In the Linux kernel, the following vulnerability has been resolved:
acct: perform last write from workqueue
In [1] it was reported that the acct(2) system call can be used to
trigger NULL deref in cases where it is set to write to a file that
triggers an internal lookup. This can e.g., happen when pointing acc(2)
to /sys/power/resume. At the point the where the write to this file
happens the calling task has already exited and called exit_fs(). A
lookup will thus trigger a NULL-deref when accessing current->fs.
Reorganize the code so that the the final write happens from the
workqueue but with the caller's credentials. This preserves the
(strange) permission model and has almost no regression risk.
This api should stop to exist though.
References
Configurations
Configuration 1 (hide)
|
History
13 Mar 2025, 16:28
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/5c928e14a2ccd99462f2351ead627b58075bb736 - Patch | |
| References | () https://git.kernel.org/stable/c/5a59ced8ffc71973d42c82484a719c8f6ac8f7f7 - Patch | |
| References | () https://git.kernel.org/stable/c/5d5b936cfa4b0d5670ca7420ef165a074bc008eb - Patch | |
| References | () https://git.kernel.org/stable/c/8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e - Patch | |
| References | () https://git.kernel.org/stable/c/5ee8da9bea70dda492d61f075658939af33d8410 - Patch | |
| References | () https://git.kernel.org/stable/c/b03782ae707cc45e65242c7cddd8e28f1c22cde5 - Patch | |
| References | () https://git.kernel.org/stable/c/a8136afca090412a36429cb6c2543c714d9c0f84 - Patch | |
| References | () https://git.kernel.org/stable/c/56d5f3eba3f5de0efdd556de4ef381e109b973a9 - Patch |
13 Mar 2025, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
12 Mar 2025, 10:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-03-12 10:15
Updated : 2025-03-13 16:28
NVD link : CVE-2025-21846
Mitre link : CVE-2025-21846
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference