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Linux KSMBD can crash systems or leak data
published 2 years ago
Summary
Multiple Linux kernel builds that include the KSMBD file‑sharing component are affected. A flaw in how KSMBD processes certain requests can cause the system to crash or expose information to an attacker. Apply the latest kernel updates for the listed Ubuntu variants or rebuild with the patched kernel to protect your servers.
What to do
- Update canonical linux-azure-5.15 to version 5.15.0-1060.69~20.04.1.
- Update canonical linux-azure-fde-5.15 to version 5.15.0-1060.69~20.04.1.1.
- Update canonical linux-gcp-5.15 to version 5.15.0-1055.63~20.04.1.
- Update canonical linux-gkeop-5.15 to version 5.15.0-1040.46~20.04.1.
- Update canonical linux-hwe-5.15 to version 5.15.0-102.112~20.04.1.
- Update canonical linux-ibm-5.15 to version 5.15.0-1050.53~20.04.1.
- Update canonical linux-intel-iotg-5.15 to version 5.15.0-1052.58~20.04.1.
- Update canonical linux-lowlatency-hwe-5.15 to version 5.15.0-102.112~20.04.1.
- Update canonical linux-oracle-5.15 to version 5.15.0-1055.61~20.04.1.
- Update canonical linux to version 5.15.0-102.112.
- Update canonical linux-azure to version 5.15.0-1060.69.
- Update canonical linux-azure-fde to version 5.15.0-1060.69.1.
- Update canonical linux-gcp to version 5.15.0-1055.63.
- Update canonical linux-gke to version 5.15.0-1054.59.
- Update canonical linux-gkeop to version 5.15.0-1040.46.
- Update canonical linux-ibm to version 5.15.0-1050.53.
- Update canonical linux-intel-iotg to version 5.15.0-1052.58.
- Update canonical linux-kvm to version 5.15.0-1054.59.
- Update canonical linux-lowlatency to version 5.15.0-102.112.
- Update canonical linux-nvidia to version 5.15.0-1048.48.
- Update canonical linux-oracle to version 5.15.0-1055.61.
- Update canonical linux-raspi to version 5.15.0-1050.53.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:20.04:LTS | canonical | linux-azure-5.15 |
< 5.15.0-1060.69~20.04.1 Fix: upgrade to 5.15.0-1060.69~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-azure-fde-5.15 |
< 5.15.0-1060.69~20.04.1.1 Fix: upgrade to 5.15.0-1060.69~20.04.1.1
|
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.15 |
< 5.15.0-1055.63~20.04.1 Fix: upgrade to 5.15.0-1055.63~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-gkeop-5.15 |
< 5.15.0-1040.46~20.04.1 Fix: upgrade to 5.15.0-1040.46~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.15 |
< 5.15.0-102.112~20.04.1 Fix: upgrade to 5.15.0-102.112~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-ibm-5.15 |
< 5.15.0-1050.53~20.04.1 Fix: upgrade to 5.15.0-1050.53~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-intel-iotg-5.15 |
< 5.15.0-1052.58~20.04.1 Fix: upgrade to 5.15.0-1052.58~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-lowlatency-hwe-5.15 |
< 5.15.0-102.112~20.04.1 Fix: upgrade to 5.15.0-102.112~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.15 |
< 5.15.0-1055.61~20.04.1 Fix: upgrade to 5.15.0-1055.61~20.04.1
|
| Ubuntu:22.04:LTS | canonical | linux |
< 5.15.0-102.112 Fix: upgrade to 5.15.0-102.112
|
| Ubuntu:22.04:LTS | canonical | linux-azure |
< 5.15.0-1060.69 Fix: upgrade to 5.15.0-1060.69
|
| Ubuntu:22.04:LTS | canonical | linux-azure-fde |
< 5.15.0-1060.69.1 Fix: upgrade to 5.15.0-1060.69.1
|
| Ubuntu:22.04:LTS | canonical | linux-gcp |
< 5.15.0-1055.63 Fix: upgrade to 5.15.0-1055.63
|
| Ubuntu:22.04:LTS | canonical | linux-gke |
< 5.15.0-1054.59 Fix: upgrade to 5.15.0-1054.59
|
| Ubuntu:22.04:LTS | canonical | linux-gkeop |
< 5.15.0-1040.46 Fix: upgrade to 5.15.0-1040.46
|
| Ubuntu:22.04:LTS | canonical | linux-ibm |
< 5.15.0-1050.53 Fix: upgrade to 5.15.0-1050.53
|
| Ubuntu:22.04:LTS | canonical | linux-intel-iotg |
< 5.15.0-1052.58 Fix: upgrade to 5.15.0-1052.58
|
| Ubuntu:22.04:LTS | canonical | linux-kvm |
< 5.15.0-1054.59 Fix: upgrade to 5.15.0-1054.59
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency |
< 5.15.0-102.112 Fix: upgrade to 5.15.0-102.112
|
| Ubuntu:22.04:LTS | canonical | linux-nvidia |
< 5.15.0-1048.48 Fix: upgrade to 5.15.0-1048.48
|
| Ubuntu:22.04:LTS | canonical | linux-oracle |
< 5.15.0-1055.61 Fix: upgrade to 5.15.0-1055.61
|
| Ubuntu:22.04:LTS | canonical | linux-raspi |
< 5.15.0-1050.53 Fix: upgrade to 5.15.0-1050.53
|
Original advisory text
linux, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities
Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate certain data structure fields when parsing lease
contexts, leading to an out-of-bounds read vulnerability. A remote attacker
could use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2023-1194)
Quentin Minster discovered that a race condition existed in the KSMBD
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A remote attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2023-32254)
It was discovered that a race condition existed in the KSMBD implementation
in the Linux kernel when handling session connections, leading to a use-
after-free vulnerability. A remote attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-32258)
It was discovered that the KSMBD implementation in the Linux kernel did not
properly validate buffer sizes in certain operations, leading to an integer
underflow and out-of-bounds read vulnerability. A remote attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2023-38427)
Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate SMB request protocol IDs, leading to a out-of-
bounds read vulnerability. A remote attacker could possibly use this to
cause a denial of service (system crash). (CVE-2023-38430)
Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate packet header sizes in certain situations,
leading to an out-of-bounds read vulnerability. A remote attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2023-38431)
It was discovered that the KSMBD implementation in the Linux kernel did not
properly handle session setup requests, leading to an out-of-bounds read
vulnerability. A remote attacker could use this to expose sensitive
information. (CVE-2023-3867)
Pratyush Yadav discovered that the Xen network backend implementation in
the Linux kernel did not properly handle zero length data request, leading
to a null pointer dereference vulnerability. An attacker in a guest VM
could possibly use this to cause a denial of service (host domain crash).
(CVE-2023-46838)
It was discovered that the IPv6 implementation of the Linux kernel did not
properly manage route cache memory usage. A remote attacker could use this
to cause a denial of service (memory exhaustion). (CVE-2023-52340)
It was discovered that the device mapper driver in the Linux kernel did not
properly validate target size during certain memory allocations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-52429, CVE-2024-23851)
Yang Chaoming discovered that the KSMBD implementation in the Linux kernel
did not properly validate request buffer sizes, leading to an out-of-bounds
read vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2024-22705)
Chenyuan Yang discovered that the btrfs file system in the Linux kernel did
not properly handle read operations on newly created subvolumes in certain
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-23850)
It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel, leading to a null pointer dereference vulnerability. A
privileged local attacker could use this to possibly cause a denial of
service (system crash). (CVE-2024-24860)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Architecture specifics;
- Block layer;
- Cryptographic API;
- Android drivers;
- EDAC drivers;
- GPU drivers;
- Media drivers;
- Multifunction device drivers;
- MTD block device drivers;
- Network drivers;
- NVME drivers;
- TTY drivers;
- Userspace I/O drivers;
- EFI Variable file system;
- F2FS file system;
- GFS2 file system;
- SMB network file system;
- BPF subsystem;
- IPv6 Networking;
- Network Traffic Control;
- AppArmor security module;
(CVE-2023-52463, CVE-2023-52445, CVE-2023-52462, CVE-2023-52609,
CVE-2023-52448, CVE-2023-52457, CVE-2023-52464, CVE-2023-52456,
CVE-2023-52454, CVE-2023-52438, CVE-2023-52480, CVE-2023-52443,
CVE-2023-52442, CVE-2024-26631, CVE-2023-52439, CVE-2023-52612,
CVE-2024-26598, CVE-2024-26586, CVE-2024-26589, CVE-2023-52444,
CVE-2023-52436, CVE-2024-26633, CVE-2024-26597, CVE-2023-52458,
CVE-2024-26591, CVE-2023-52449, CVE-2023-52467, CVE-2023-52441,
CVE-2023-52610, CVE-2023-52451, CVE-2023-52469, CVE-2023-52470)
did not properly validate certain data structure fields when parsing lease
contexts, leading to an out-of-bounds read vulnerability. A remote attacker
could use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2023-1194)
Quentin Minster discovered that a race condition existed in the KSMBD
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A remote attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2023-32254)
It was discovered that a race condition existed in the KSMBD implementation
in the Linux kernel when handling session connections, leading to a use-
after-free vulnerability. A remote attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-32258)
It was discovered that the KSMBD implementation in the Linux kernel did not
properly validate buffer sizes in certain operations, leading to an integer
underflow and out-of-bounds read vulnerability. A remote attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2023-38427)
Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate SMB request protocol IDs, leading to a out-of-
bounds read vulnerability. A remote attacker could possibly use this to
cause a denial of service (system crash). (CVE-2023-38430)
Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate packet header sizes in certain situations,
leading to an out-of-bounds read vulnerability. A remote attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2023-38431)
It was discovered that the KSMBD implementation in the Linux kernel did not
properly handle session setup requests, leading to an out-of-bounds read
vulnerability. A remote attacker could use this to expose sensitive
information. (CVE-2023-3867)
Pratyush Yadav discovered that the Xen network backend implementation in
the Linux kernel did not properly handle zero length data request, leading
to a null pointer dereference vulnerability. An attacker in a guest VM
could possibly use this to cause a denial of service (host domain crash).
(CVE-2023-46838)
It was discovered that the IPv6 implementation of the Linux kernel did not
properly manage route cache memory usage. A remote attacker could use this
to cause a denial of service (memory exhaustion). (CVE-2023-52340)
It was discovered that the device mapper driver in the Linux kernel did not
properly validate target size during certain memory allocations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-52429, CVE-2024-23851)
Yang Chaoming discovered that the KSMBD implementation in the Linux kernel
did not properly validate request buffer sizes, leading to an out-of-bounds
read vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2024-22705)
Chenyuan Yang discovered that the btrfs file system in the Linux kernel did
not properly handle read operations on newly created subvolumes in certain
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-23850)
It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel, leading to a null pointer dereference vulnerability. A
privileged local attacker could use this to possibly cause a denial of
service (system crash). (CVE-2024-24860)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Architecture specifics;
- Block layer;
- Cryptographic API;
- Android drivers;
- EDAC drivers;
- GPU drivers;
- Media drivers;
- Multifunction device drivers;
- MTD block device drivers;
- Network drivers;
- NVME drivers;
- TTY drivers;
- Userspace I/O drivers;
- EFI Variable file system;
- F2FS file system;
- GFS2 file system;
- SMB network file system;
- BPF subsystem;
- IPv6 Networking;
- Network Traffic Control;
- AppArmor security module;
(CVE-2023-52463, CVE-2023-52445, CVE-2023-52462, CVE-2023-52609,
CVE-2023-52448, CVE-2023-52457, CVE-2023-52464, CVE-2023-52456,
CVE-2023-52454, CVE-2023-52438, CVE-2023-52480, CVE-2023-52443,
CVE-2023-52442, CVE-2024-26631, CVE-2023-52439, CVE-2023-52612,
CVE-2024-26598, CVE-2024-26586, CVE-2024-26589, CVE-2023-52444,
CVE-2023-52436, CVE-2024-26633, CVE-2024-26597, CVE-2023-52458,
CVE-2024-26591, CVE-2023-52449, CVE-2023-52467, CVE-2023-52441,
CVE-2023-52610, CVE-2023-52451, CVE-2023-52469, CVE-2023-52470)
References
- https://ubuntu.com/security/notices/USN-6725-1 Vendor Advisory
- https://ubuntu.com/security/CVE-2023-1194 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-3867 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-32254 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-32258 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-38427 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-38430 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-38431 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-46838 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52340 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52429 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52436 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52438 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52439 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52441 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52442 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52443 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52444 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52445 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52448 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52449 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52451 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52454 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52456 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52457 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52458 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52462 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52463 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52464 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52467 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52469 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52470 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52480 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52609 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52610 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52612 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-22705 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-23850 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-23851 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-24860 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26586 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26589 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26591 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26597 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26598 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26631 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26633 Third Party Advisory
Timeline
Published9 Apr 2024
Updated22 Oct 2026
First seen22 Oct 2026
Sources
USN-6725-1 · OSV
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