CVE-2022-49085

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49085
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 Patch
https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 Patch
https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 Patch
https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 Patch
https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 Patch
https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 Patch
https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 Patch
https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 Patch
https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*
History

25 Mar 2025, 16:21

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 - () https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 - Patch
References () https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 - () https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 - Patch
References () https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 - () https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 - Patch
References () https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 - () https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 - Patch
References () https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 - () https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 - Patch
References () https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 - () https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 - Patch
References () https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 - () https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 - Patch
References () https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 - () https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 - Patch
References () https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e - () https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*

27 Feb 2025, 18:15

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drbd: Arregla cinco errores de use-after-free en get_initial_state En get_initial_state, llama a notify_initial_state_done(skb,..) si cb->args[5]==1. Si genlmsg_put() falló en notify_initial_state_done(), el skb será liberado por nlmsg_free(skb). Entonces get_initial_state saldrá y el skb liberado será utilizado por el valor de retorno skb->len, que es un error de uaf. Lo que es peor, el mismo problema va aún más allá: skb también se puede liberar en las llamadas notify_*_state_change -> notify_*_state a continuación. Por lo tanto, ocurrieron 4 errores de uaf adicionales. Mi parche permite que las funciones llamadas al problema: notify_initial_state_done y notify_*_state_change devuelvan un código de error si ocurren errores. Para que los códigos de error se puedan propagar y los errores de uaf se puedan evitar, la v2 informa una advertencia de compilación. Esta v3 corrigió esta advertencia y se compiló correctamente en mi entorno local sin advertencias adicionales. v2: https://lore.kernel.org/patchwork/patch/1435218/
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

26 Feb 2025, 07:00

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:00

Updated : 2025-03-25 16:21

NVD link : CVE-2022-49085

Mitre link : CVE-2022-49085

CVE.ORG link : CVE-2022-49085

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free