Track vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
9.8
CVE-2026-74556: Linux kernel iSCSI driver may overflow buffer
CVE-2026-74556 · published 2 months ago
Summary
The iSCSI networking component in the Linux kernel can write more data than its fixed memory area, potentially corrupting memory. This affects Canonical Linux distributions, including cloud‑specific versions. Update the kernel to the latest patched release to fix the issue.
What to do
- Update debian linux to version 6.12.105-1.
- Update debian linux to version 7.1.8-1.
- Update linux kernel to version 7.1.8.
- Update debian linux-6.12 to version 6.12.107-1~deb12u1.
- Update canonical linux-nvidia-tegra to version 6.8.0-1035.38.
- Update debian linux to version 6.1.187-1.
- Update bellsoft linux-lts to version 6.1.189-r0.
- Update bellsoft linux-lts to version 6.12.103-r0.
- Update bellsoft linux-lts to version 6.18.46-r0.
- Update canonical linux-aws-5.15 to version 5.15.0-1117.124~20.04.1.
- Update canonical linux-azure-5.15 to version 5.15.0-1123.132~20.04.1.
- Update canonical linux-azure-fde-5.15 to version 5.15.0-1122.131~20.04.1.
- Update canonical linux-gcp-5.15 to version 5.15.0-1118.128~20.04.1.
- Update canonical linux-hwe-5.15 to version 5.15.0-198.208~20.04.1.
- Update canonical linux-ibm-5.15 to version 5.15.0-1111.115~20.04.1.
- Update canonical linux-intel-iotg-5.15 to version 5.15.0-1112.118~20.04.1.
- Update canonical linux-lowlatency-hwe-5.15 to version 5.15.0-195.205~20.04.1.
- Update canonical linux-oracle-5.15 to version 5.15.0-1114.120~20.04.1.
- Update canonical linux to version 5.15.0-198.208.
- Update canonical linux-aws to version 5.15.0-1117.124.
- Update canonical linux-azure to version 5.15.0-1123.132.
- Update canonical linux-azure-fde to version 5.15.0-1122.131.
- Update canonical linux-gcp to version 5.15.0-1118.128.
- Update canonical linux-gke to version 5.15.0-1113.119.
- Update canonical linux-gkeop to version 5.15.0-1100.108.
- Update canonical linux-ibm to version 5.15.0-1111.115.
- Update canonical linux-intel-iotg to version 5.15.0-1112.118.
- Update canonical linux-kvm to version 5.15.0-1109.114.
- Update canonical linux-lowlatency to version 5.15.0-195.205.
- Update canonical linux-oracle to version 5.15.0-1114.120.
- Update canonical linux-xilinx-zynqmp to version 5.15.0-1080.84.
- Update canonical linux-intel-iot-realtime to version 5.15.0-1109.111.
- Update canonical linux-realtime to version 5.15.0-1116.125.
- Update canonical linux-aws-fips to version 5.15.0-1117.124+fips1.
- Update canonical linux-azure-fips to version 5.15.0-1123.132+fips1.
- Update canonical linux-fips to version 5.15.0-198.208+fips1.
- Update canonical linux-gcp-fips to version 5.15.0-1118.128+fips1.
- Update canonical linux-riscv-5.15 to version 5.15.0-1111.115~20.04.1.
- Update canonical linux-nvidia to version 5.15.0-1112.113.
- Update canonical linux-bluefield to version 5.15.0-1101.103.
- Update linux linux to version c97b5265cc47775f77fd2a23d6bde0426997b233 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:Pro:14.04:LTS | canonical | linux | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-aws | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-azure | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-lts-xenial | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-aws-hwe | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-gcp | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-hwe | All versions |
| Ubuntu:16.04:LTS | canonical | linux-hwe-edge | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-kvm | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-oracle | All versions |
| Ubuntu:Pro:FIPS:16.04:LTS | canonical | linux-fips | All versions |
| Ubuntu:18.04:LTS | canonical | linux-aws-5.0 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-aws-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-aws-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-azure-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-azure-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-edge | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-gcp-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gcp-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-gcp-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gke-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gke-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gkeop-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-hwe-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-ibm-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oem | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oracle-5.0 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oracle-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-oracle-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-raspi-5.4 | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-aws-fips | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-azure-fips | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-gcp-fips | All versions |
| Ubuntu:20.04:LTS | canonical | linux-aws-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-aws-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-aws-5.15 |
< 5.15.0-1117.124~20.04.1 Fix: upgrade to 5.15.0-1117.124~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-aws-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-azure-5.15 |
< 5.15.0-1123.132~20.04.1 Fix: upgrade to 5.15.0-1123.132~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-azure-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-fde | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-azure-fde-5.15 |
< 5.15.0-1122.131~20.04.1 Fix: upgrade to 5.15.0-1122.131~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-bluefield | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-gcp-5.15 |
< 5.15.0-1118.128~20.04.1 Fix: upgrade to 5.15.0-1118.128~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke | All versions |
Showing 50 of 197. Show the rest
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:20.04:LTS | canonical | linux-gke-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gkeop | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gkeop-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-hwe-5.15 |
< 5.15.0-198.208~20.04.1 Fix: upgrade to 5.15.0-198.208~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-ibm | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-ibm-5.15 |
< 5.15.0-1111.115~20.04.1 Fix: upgrade to 5.15.0-1111.115~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-intel-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-intel-iotg-5.15 |
< 5.15.0-1112.118~20.04.1 Fix: upgrade to 5.15.0-1112.118~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-iot | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-lowlatency-hwe-5.15 |
< 5.15.0-195.205~20.04.1 Fix: upgrade to 5.15.0-195.205~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-nvidia-tegra-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.10 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.13 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.14 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.6 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-oracle-5.15 |
< 5.15.0-1114.120~20.04.1 Fix: upgrade to 5.15.0-1114.120~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-raspi | All versions |
| Ubuntu:20.04:LTS | canonical | linux-raspi2 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-riscv | All versions |
| Ubuntu:20.04:LTS | canonical | linux-riscv-5.11 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-riscv-5.15 |
< 5.15.0-1111.115~20.04.1 Fix: upgrade to 5.15.0-1111.115~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-riscv-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-xilinx-zynqmp | All versions |
| Ubuntu:22.04:LTS | canonical | linux-allwinner-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-ibm-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-intel-iot-realtime | All versions |
| Ubuntu:22.04:LTS | canonical | linux-intel-iotg |
< 5.15.0-1112.118 Fix: upgrade to 5.15.0-1112.118
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency |
< 5.15.0-195.205 Fix: upgrade to 5.15.0-195.205
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia |
< 5.15.0-1112.113 Fix: upgrade to 5.15.0-1112.113
|
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-tegra | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-tegra-igx | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-5.17 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.0 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.1 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oracle-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oracle-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-realtime | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-6.5 | All versions |
| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-realtime-6.8 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-lowlatency-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-lowlatency | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.8 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-raspi-realtime | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-xilinx | All versions |
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime-6.14 | All versions |
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime-6.17 | All versions |
| Ubuntu:26.04:LTS | canonical | linux-nvidia-bos | All versions |
| Ubuntu:26.04:LTS | canonical | linux-oem-7.0 | All versions |
| Debian:14 | debian | linux |
< 7.1.8-1 Fix: upgrade to 7.1.8-1
|
| – | linux | linux |
< c97b5265cc47775f77fd2a23d6bde0426997b233 2.6.29 |
| Debian:11 | debian | linux | All versions |
| Debian:12 | debian | linux |
< 6.1.187-1 Fix: upgrade to 6.1.187-1
|
| Debian:13 | debian | linux |
< 6.12.105-1 Fix: upgrade to 6.12.105-1
|
| Linux | linux | kernel |
>= 6.19.0, < 7.1.8 Fix: upgrade to 7.1.8
|
| Debian:12 | debian | linux-6.12 |
< 6.12.107-1~deb12u1 Fix: upgrade to 6.12.107-1~deb12u1
|
| Ubuntu:24.04:LTS | canonical | linux-nvidia-tegra |
< 6.8.0-1035.38 Fix: upgrade to 6.8.0-1035.38
|
| Alpaquita:23 | bellsoft | linux-lts |
>= 6.1.182-r0, < 6.1.189-r0 Fix: upgrade to 6.1.189-r0
|
| Alpaquita:25 | bellsoft | linux-lts |
>= 6.12.95-r0, < 6.12.103-r0 Fix: upgrade to 6.12.103-r0
|
| Alpaquita:stream | bellsoft | linux-lts |
>= 6.18.43-r0, < 6.18.46-r0 Fix: upgrade to 6.18.46-r0
|
| Ubuntu:22.04:LTS | canonical | linux |
< 5.15.0-198.208 Fix: upgrade to 5.15.0-198.208
|
| Ubuntu:22.04:LTS | canonical | linux-aws |
< 5.15.0-1117.124 Fix: upgrade to 5.15.0-1117.124
|
| Ubuntu:22.04:LTS | canonical | linux-azure |
< 5.15.0-1123.132 Fix: upgrade to 5.15.0-1123.132
|
| Ubuntu:22.04:LTS | canonical | linux-azure-fde |
< 5.15.0-1122.131 Fix: upgrade to 5.15.0-1122.131
|
| Ubuntu:22.04:LTS | canonical | linux-gcp |
< 5.15.0-1118.128 Fix: upgrade to 5.15.0-1118.128
|
| Ubuntu:22.04:LTS | canonical | linux-gke |
< 5.15.0-1113.119 Fix: upgrade to 5.15.0-1113.119
|
| Ubuntu:22.04:LTS | canonical | linux-gkeop |
< 5.15.0-1100.108 Fix: upgrade to 5.15.0-1100.108
|
| Ubuntu:22.04:LTS | canonical | linux-ibm |
< 5.15.0-1111.115 Fix: upgrade to 5.15.0-1111.115
|
| Ubuntu:22.04:LTS | canonical | linux-kvm |
< 5.15.0-1109.114 Fix: upgrade to 5.15.0-1109.114
|
| Ubuntu:22.04:LTS | canonical | linux-oracle |
< 5.15.0-1114.120 Fix: upgrade to 5.15.0-1114.120
|
| Ubuntu:22.04:LTS | canonical | linux-xilinx-zynqmp |
< 5.15.0-1080.84 Fix: upgrade to 5.15.0-1080.84
|
| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-intel-iot-realtime |
< 5.15.0-1109.111 Fix: upgrade to 5.15.0-1109.111
|
| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-realtime |
< 5.15.0-1116.125 Fix: upgrade to 5.15.0-1116.125
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-aws-fips |
< 5.15.0-1117.124+fips1 Fix: upgrade to 5.15.0-1117.124+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-azure-fips |
< 5.15.0-1123.132+fips1 Fix: upgrade to 5.15.0-1123.132+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-fips |
< 5.15.0-198.208+fips1 Fix: upgrade to 5.15.0-198.208+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-gcp-fips |
< 5.15.0-1118.128+fips1 Fix: upgrade to 5.15.0-1118.128+fips1
|
| Ubuntu:Nvidia-BlueField:22.04:LTS | canonical | linux-bluefield |
< 5.15.0-1101.103 Fix: upgrade to 5.15.0-1101.103
|
Original advisory text
scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer
In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, which is allocated for ISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP, REJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU whose DataSegmentLength exceeds that buffer. The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its data segment (sense/response data) into conn->data via iscsi_tcp_data_recv_prep(), but it does so without the same check. The only upstream bound on in.datalen is conn->max_recv_dlength, the initiator's advertised MaxRecvDataSegmentLength, which is commonly negotiated well above 8192 (open-iscsi defaults to 262144). A target that returns a SCSI Response with a DataSegmentLength between 8193 and max_recv_dlength therefore overflows the 8192-byte conn->data buffer. Once the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly like those responses: bound the data segment, receive it into conn->data when present, and otherwise complete the PDU with no data. Fold the opcode into that case group rather than duplicating the check.
References
- https://ubuntu.com/security/CVE-2026-74556 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-74556 Third Party Advisory
- https://git.kernel.org/linus/c1dea15f819cded9b3faf58f8bec72323568b6e6 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8876-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8875-1 Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
- https://git.kernel.org/stable/c/084af0253673425ce2ae62e3c7f74f0dd023711b Third Party Advisory
- https://git.kernel.org/stable/c/72815741715bd41556dac5eeb068bf0f8af06ee7 Third Party Advisory
- https://git.kernel.org/stable/c/b0aa3e8e2ab4ca92adb28a3ef41873b3363b8676 Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2026-74556 Vendor Advisory
- https://git.kernel.org/stable/c/c1dea15f819cded9b3faf58f8bec72323568b6e6 Third Party Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74556... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-74556 Vendor Advisory
- https://git.kernel.org/stable/c/a51812842084fd390590ab8dc0431f10c73ddc56 URL
- https://git.kernel.org/stable/c/a8f94cc9f0e5759252551be3a172960c57f21f54 URL
- https://git.kernel.org/stable/c/f1a3a51fc5dba0e99532379665069f1700da6b44 URL
- https://git.kernel.org/stable/c/c97b5265cc47775f77fd2a23d6bde0426997b233 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8781-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8875-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8878-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8879-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8877-1 Vendor Advisory
- https://docs.bell-sw.com/security/cves/CVE-2026-74556 Vendor Advisory
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically
- Gives an attacker full control
Severity
9.8
Critical
Timeline
Published15 Aug 2026
Updated4 Nov 2026
First seen15 Aug 2026
Sources
CVE-2026-74556 · NVD
CVE-2026-74556 · MITRE
DEBIAN-CVE-2026-74556 · OSV
UBUNTU-CVE-2026-74556 · OSV
CVE-2026-74556 · OSV
BELL-CVE-2026-74556 · OSV
Track software like this
Free during beta