cbcvebase.
CVE-2025-21726
published 2025-02-27

CVE-2025-21726: In the Linux kernel, the following vulnerability has been resolved: padata: avoid UAF for reorder_work Although the previous patch can avoid ps and ps UAF for…

PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.23%
13.4th percentile
In the Linux kernel, the following vulnerability has been resolved:

padata: avoid UAF for reorder_work

Although the previous patch can avoid ps and ps UAF for _do_serial, it
can not avoid potential UAF issue for reorder_work. This issue can
happen just as below:

crypto_request crypto_request crypto_del_alg
padata_do_serial
...
padata_reorder
// processes all remaining
// requests then breaks
while (1) {
if (!padata)
break;
...
}

padata_do_serial
// new request added
list_add
// sees the new request
queue_work(reorder_work)
padata_reorder
queue_work_on(squeue->work)
...


padata_serial_worker
// completes new request,
// no more outstanding
// requests

crypto_del_alg
// free pd


invoke_padata_reorder
// UAF of pd

To avoid UAF for 'reorder_work', get 'pd' ref before put 'reorder_work'
into the 'serial_wq' and put 'pd' ref until the 'serial_wq' finish.

Affected

29 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
debianlinux-6.1< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 5.4.19 < 5.55.5
linuxlinux>= 5.5.3 < 5.65.6
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe14c6209efea2208597dbd3e52dc87a0d1a8f2dbe1
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < 7000507bb0d2ceb545c0a690e0c707c897d102c27000507bb0d2ceb545c0a690e0c707c897d102c2
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < 6f45ef616775b0ce7889b0f6077fc8d681ab30bc6f45ef616775b0ce7889b0f6077fc8d681ab30bc
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < a54091c24220a4cd847d5b4f36d678edacddbaf0a54091c24220a4cd847d5b4f36d678edacddbaf0
linuxlinux>= bbefa1dd6a6d53537c11624752219e39959d04fb < dd7d37ccf6b11f3d95e797ebe4e9e886d0332600dd7d37ccf6b11f3d95e797ebe4e9e886d0332600
linuxlinux_kernel>= 0 < 5.10.237-15.10.237-1
linuxlinux_kernel>= 0 < 6.1.129-16.1.129-1
linuxlinux_kernel>= 0 < 6.12.13-16.12.13-1
linuxlinux_kernel>= 0 < 6.12.13-16.12.13-1
linuxlinux_kernel>= 0 < 5.15.0-140.1505.15.0-140.150
linuxlinux_kernel>= 0 < 6.8.0-64.676.8.0-64.67
linuxlinux_kernel>= 0 < 5.4.0-225.2455.4.0-225.245
linuxlinux_kernel>= 5.11 < 5.15.795.15.79
linuxlinux_kernel>= 5.16 < 6.1.1296.1.129
linuxlinux_kernel>= 5.4.19 < 5.55.5
linuxlinux_kernel>= 5.5.3 < 5.10.2355.10.235

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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