cbcvebase.
CVE-2025-21846
published 2025-03-12

CVE-2025-21846: 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…

PriorityP423medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.6th percentile
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.

Affected

29 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.133-1 (bookworm)linux 6.1.133-1 (bookworm)
debianlinux-6.1< linux 6.1.133-1 (bookworm)linux 6.1.133-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b03782ae707cc45e65242c7cddd8e28f1c22cde5b03782ae707cc45e65242c7cddd8e28f1c22cde5
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5d5b936cfa4b0d5670ca7420ef165a074bc008eb5d5b936cfa4b0d5670ca7420ef165a074bc008eb
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5ee8da9bea70dda492d61f075658939af33d84105ee8da9bea70dda492d61f075658939af33d8410
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5c928e14a2ccd99462f2351ead627b58075bb7365c928e14a2ccd99462f2351ead627b58075bb736
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5a59ced8ffc71973d42c82484a719c8f6ac8f7f75a59ced8ffc71973d42c82484a719c8f6ac8f7f7
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a8136afca090412a36429cb6c2543c714d9c0f84a8136afca090412a36429cb6c2543c714d9c0f84
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 56d5f3eba3f5de0efdd556de4ef381e109b973a956d5f3eba3f5de0efdd556de4ef381e109b973a9
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.237-15.10.237-1
linuxlinux_kernel>= 0 < 6.1.133-16.1.133-1
linuxlinux_kernel>= 0 < 6.12.17-16.12.17-1
linuxlinux_kernel>= 0 < 6.12.17-16.12.17-1
linuxlinux_kernel>= 0 < 5.4.0-216.2365.4.0-216.236
linuxlinux_kernel>= 0 < 5.15.0-140.1505.15.0-140.150
linuxlinux_kernel>= 0 < 6.8.0-78.786.8.0-78.78
linuxlinux_kernel>= 2.6.12 < 6.1.1306.1.130
linuxlinux_kernel>= 6.13 < 6.13.56.13.5
linuxlinux_kernel>= 6.2 < 6.6.806.6.80
linuxlinux_kernel>= 6.7 < 6.12.176.12.17

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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