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CVE-2021-47310: Linux kernel may access freed network memory
CVE-2021-47310 · published 2 years ago
Summary
The Linux kernel used in Ubuntu (standard, Azure, AWS, LTS Xenial, AWS HWE) could continue to use internal network data after it has been released. This use‑after‑free mistake can cause system crashes or let malicious code take control. Apply the latest kernel updates from Canonical to resolve the issue.
What to do
- Update canonical linux-azure to version 4.15.0-1124.137~14.04.1.
- Update canonical linux-aws-hwe to version 4.15.0-1112.119~16.04.1.
- Update canonical linux-azure to version 4.15.0-1124.137~16.04.1.
- Update canonical linux-gcp to version 4.15.0-1109.123~16.04.1.
- Update canonical linux-hwe to version 4.15.0-159.167~16.04.1.
- Update canonical linux-oracle to version 4.15.0-1081.89~16.04.1.
- Update canonical linux to version 4.15.0-159.167.
- Update canonical linux-aws to version 4.15.0-1112.119.
- Update canonical linux-aws-5.4 to version 5.4.0-1057.60~18.04.1.
- Update canonical linux-azure-4.15 to version 4.15.0-1124.137.
- Update canonical linux-azure-5.4 to version 5.4.0-1059.62~18.04.1.
- Update canonical linux-gcp-4.15 to version 4.15.0-1109.123.
- Update canonical linux-gcp-5.4 to version 5.4.0-1053.57~18.04.1.
- Update canonical linux-hwe-5.4 to version 5.4.0-87.98~18.04.1.
- Update canonical linux-kvm to version 4.15.0-1100.102.
- Update canonical linux-oracle to version 4.15.0-1081.89.
- Update canonical linux-oracle-5.4 to version 5.4.0-1055.59~18.04.1.
- Update canonical linux-raspi-5.4 to version 5.4.0-1044.48~18.04.1.
- Update canonical linux-aws-fips to version 4.15.0-2054.56.
- Update canonical linux-azure-fips to version 4.15.0-2036.40.
- Update canonical linux-fips to version 4.15.0-1070.79.
- Update canonical linux-gcp-fips to version 4.15.0-2019.21.
- Update canonical linux to version 5.4.0-88.99.
- Update canonical linux-aws to version 5.4.0-1057.60.
- Update canonical linux-azure to version 5.4.0-1059.62.
- Update canonical linux-bluefield to version 5.4.0-1019.22.
- Update canonical linux-gcp to version 5.4.0-1053.57.
- Update canonical linux-gkeop to version 5.4.0-1024.25.
- Update canonical linux-ibm to version 5.4.0-1005.6.
- Update canonical linux-kvm to version 5.4.0-1047.49.
- Update canonical linux-oracle to version 5.4.0-1055.59.
- Update canonical linux-raspi to version 5.4.0-1044.48.
- Update canonical linux-aws-fips to version 5.4.0-1069.73+fips2.
- Update canonical linux-azure-fips to version 5.4.0-1073.76+fips1.
- Update canonical linux-fips to version 5.4.0-1034.40.
- Update canonical linux-gcp-fips to version 5.4.0-1067.71~20.04.1.
- Update debian linux to version 5.14.6-1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:Pro:14.04:LTS | canonical | linux-azure |
< 4.15.0-1124.137~14.04.1 Fix: upgrade to 4.15.0-1124.137~14.04.1
|
| 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-lts-xenial | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-aws | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-aws-hwe |
< 4.15.0-1112.119~16.04.1 Fix: upgrade to 4.15.0-1112.119~16.04.1
|
| Ubuntu:Pro:16.04:LTS | canonical | linux-azure |
< 4.15.0-1124.137~16.04.1 Fix: upgrade to 4.15.0-1124.137~16.04.1
|
| Ubuntu:Pro:16.04:LTS | canonical | linux-gcp |
< 4.15.0-1109.123~16.04.1 Fix: upgrade to 4.15.0-1109.123~16.04.1
|
| Ubuntu:Pro:16.04:LTS | canonical | linux-hwe |
< 4.15.0-159.167~16.04.1 Fix: upgrade to 4.15.0-159.167~16.04.1
|
| 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 |
< 4.15.0-1081.89~16.04.1 Fix: upgrade to 4.15.0-1081.89~16.04.1
|
| Ubuntu:Pro:FIPS:16.04:LTS | canonical | linux-fips | All versions |
| Ubuntu:18.04:LTS | canonical | linux |
< 4.15.0-159.167 Fix: upgrade to 4.15.0-159.167
|
| Ubuntu:18.04:LTS | canonical | linux-aws |
< 4.15.0-1112.119 Fix: upgrade to 4.15.0-1112.119
|
| Ubuntu:18.04:LTS | canonical | linux-aws-5.4 |
< 5.4.0-1057.60~18.04.1 Fix: upgrade to 5.4.0-1057.60~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-azure-4.15 |
< 4.15.0-1124.137 Fix: upgrade to 4.15.0-1124.137
|
| Ubuntu:18.04:LTS | canonical | linux-azure-5.4 |
< 5.4.0-1059.62~18.04.1 Fix: upgrade to 5.4.0-1059.62~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-gcp-4.15 |
< 4.15.0-1109.123 Fix: upgrade to 4.15.0-1109.123
|
| Ubuntu:18.04:LTS | canonical | linux-gcp-5.4 |
< 5.4.0-1053.57~18.04.1 Fix: upgrade to 5.4.0-1053.57~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-hwe-5.4 |
< 5.4.0-87.98~18.04.1 Fix: upgrade to 5.4.0-87.98~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-kvm |
< 4.15.0-1100.102 Fix: upgrade to 4.15.0-1100.102
|
| Ubuntu:18.04:LTS | canonical | linux-oracle |
< 4.15.0-1081.89 Fix: upgrade to 4.15.0-1081.89
|
| Ubuntu:18.04:LTS | canonical | linux-oracle-5.4 |
< 5.4.0-1055.59~18.04.1 Fix: upgrade to 5.4.0-1055.59~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-raspi-5.4 |
< 5.4.0-1044.48~18.04.1 Fix: upgrade to 5.4.0-1044.48~18.04.1
|
| Ubuntu:18.04:LTS | canonical | linux-aws-5.0 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-aws-5.3 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-5.3 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-edge | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gcp | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gcp-5.3 | 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:18.04:LTS | canonical | linux-hwe | All versions |
| Ubuntu:18.04:LTS | canonical | linux-hwe-edge | 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:FIPS-updates:18.04:LTS | canonical | linux-aws-fips |
< 4.15.0-2054.56 Fix: upgrade to 4.15.0-2054.56
|
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-azure-fips |
< 4.15.0-2036.40 Fix: upgrade to 4.15.0-2036.40
|
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-fips |
< 4.15.0-1070.79 Fix: upgrade to 4.15.0-1070.79
|
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-gcp-fips |
< 4.15.0-2019.21 Fix: upgrade to 4.15.0-2019.21
|
| Ubuntu:Pro:FIPS:18.04:LTS | canonical | linux-aws-fips | All versions |
| Ubuntu:Pro:FIPS:18.04:LTS | canonical | linux-azure-fips | All versions |
| Ubuntu:Pro:FIPS:18.04:LTS | canonical | linux-fips | All versions |
| Ubuntu:Pro:FIPS:18.04:LTS | canonical | linux-gcp-fips | All versions |
| Ubuntu:20.04:LTS | canonical | linux |
< 5.4.0-88.99 Fix: upgrade to 5.4.0-88.99
|
Showing 50 of 120. Show the rest
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:20.04:LTS | canonical | linux-aws |
< 5.4.0-1057.60 Fix: upgrade to 5.4.0-1057.60
|
| Ubuntu:20.04:LTS | canonical | linux-azure |
< 5.4.0-1059.62 Fix: upgrade to 5.4.0-1059.62
|
| Ubuntu:20.04:LTS | canonical | linux-bluefield |
< 5.4.0-1019.22 Fix: upgrade to 5.4.0-1019.22
|
| Ubuntu:20.04:LTS | canonical | linux-gcp |
< 5.4.0-1053.57 Fix: upgrade to 5.4.0-1053.57
|
| Ubuntu:20.04:LTS | canonical | linux-gkeop |
< 5.4.0-1024.25 Fix: upgrade to 5.4.0-1024.25
|
| Ubuntu:20.04:LTS | canonical | linux-ibm |
< 5.4.0-1005.6 Fix: upgrade to 5.4.0-1005.6
|
| Ubuntu:20.04:LTS | canonical | linux-kvm |
< 5.4.0-1047.49 Fix: upgrade to 5.4.0-1047.49
|
| Ubuntu:20.04:LTS | canonical | linux-oracle |
< 5.4.0-1055.59 Fix: upgrade to 5.4.0-1055.59
|
| Ubuntu:20.04:LTS | canonical | linux-raspi |
< 5.4.0-1044.48 Fix: upgrade to 5.4.0-1044.48
|
| Ubuntu:20.04:LTS | canonical | linux-aws-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-aws-5.13 | All versions |
| 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:20.04:LTS | canonical | linux-azure-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-fde | 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:20.04:LTS | canonical | linux-gcp-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke-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:20.04:LTS | canonical | linux-hwe-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-intel-5.13 | 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:20.04:LTS | canonical | linux-oracle-5.8 | 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:20.04:LTS | canonical | linux-riscv-5.8 | All versions |
| Ubuntu:Pro:FIPS-updates:20.04:LTS | canonical | linux-aws-fips |
< 5.4.0-1069.73+fips2 Fix: upgrade to 5.4.0-1069.73+fips2
|
| Ubuntu:Pro:FIPS-updates:20.04:LTS | canonical | linux-azure-fips |
< 5.4.0-1073.76+fips1 Fix: upgrade to 5.4.0-1073.76+fips1
|
| Ubuntu:Pro:FIPS-updates:20.04:LTS | canonical | linux-fips |
< 5.4.0-1034.40 Fix: upgrade to 5.4.0-1034.40
|
| Ubuntu:Pro:FIPS-updates:20.04:LTS | canonical | linux-gcp-fips |
< 5.4.0-1067.71~20.04.1 Fix: upgrade to 5.4.0-1067.71~20.04.1
|
| Ubuntu:Pro:FIPS:20.04:LTS | canonical | linux-aws-fips | All versions |
| Ubuntu:Pro:FIPS:20.04:LTS | canonical | linux-azure-fips | All versions |
| Ubuntu:Pro:FIPS:20.04:LTS | canonical | linux-fips | All versions |
| Ubuntu:Pro:FIPS:20.04:LTS | canonical | linux-gcp-fips | 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-azure-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.2 | 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-gcp-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.2 | 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-intel-iot-realtime | All versions |
| 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-nvidia-6.2 | 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-realtime | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-5.19 | 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:24.04:LTS | canonical | linux-raspi-realtime | All versions |
| – | linux | linux_kernel |
>= 3.10, < 4.4.277 >= 4.5, < 4.9.277 >= 4.10, < 4.14.241 >= 4.15, < 4.19.199 >= 4.20, < 5.4.135 >= 5.5, < 5.10.53 >= 5.11, < 5.13.5 5.14 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Debian:12 | debian | linux |
< 5.14.6-1 Fix: upgrade to 5.14.6-1
|
Original advisory text
In the Linux kernel, the following vulnerability has been resolved: net: ti: fix UAF in tlan_remove_one priv is netdev private data and it cannot be used after free_netdev() call. Using priv after ...
In the Linux kernel, the following vulnerability has been resolved: net: ti: fix UAF in tlan_remove_one priv is netdev private data and it cannot be used after free_netdev() call. Using priv after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function.
References
- https://ubuntu.com/security/CVE-2021-47310 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2021-47310 Third Party Advisory
- https://git.kernel.org/linus/0336f8ffece62f882ab3012820965a786a983f70 Third Party Advisory
- https://git.kernel.org/stable/c/a18a8d9cfbb112ad72e625372849adc3986fd6bf Third Party Advisory
- https://git.kernel.org/stable/c/c263ae8c7e4c482387de5e6c89e213f8173fe8b6 Third Party Advisory
- https://git.kernel.org/stable/c/0538b0ab7d2c396e385694228c7cdcd2d2c514e9 Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-47310 Vendor Advisory
- https://git.kernel.org/stable/c/a0a817b2d308fac090a05cbbe80988e073ac5193 Third Party Advisory
- https://git.kernel.org/stable/c/b7e5563f2a7862a9e4796abb9908b092f677e3c1 Third Party Advisory
- https://git.kernel.org/stable/c/f2a062fcfe1d6f1b0a86fa76ae21c277d65f4405 Third Party Advisory
- https://git.kernel.org/stable/c/93efab0ef2a607fff9166d447c4035f98b5db342 Third Party Advisory
- https://git.kernel.org/stable/c/0336f8ffece62f882ab3012820965a786a983f70 Third Party Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-416Use After Free
Timeline
Published21 May 2024
Updated4 Nov 2026
First seen2 Apr 2026
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Free during beta