CVE-2025-38031

padata: do not leak refcount in reorder_work

State: Published
Severity: Not scored
Published: Jun 18, 2025
Updated: May 23, 2026
Reserved: Apr 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

padata: do not leak refcount in reorder_work

A recent patch that addressed a UAF introduced a reference count leak: the parallel_data refcount is incremented unconditionally, regardless of the return value of queue_work(). If the work item is already queued, the incremented refcount is never decremented.

Fix this by checking the return value of queue_work() and decrementing the refcount when necessary.

Resolves:

Unreferenced object 0xffff9d9f421e3d80 (size 192): comm "cryptomgr_probe", pid 157, jiffies 4294694003 hex dump (first 32 bytes): 80 8b cf 41 9f 9d ff ff b8 97 e0 89 ff ff ff ff ...A............ d0 97 e0 89 ff ff ff ff 19 00 00 00 1f 88 23 00 ..............#. backtrace (crc 838fb36): __kmalloc_cache_noprof+0x284/0x320 padata_alloc_pd+0x20/0x1e0 padata_alloc_shell+0x3b/0xa0 0xffffffffc040a54d cryptomgr_probe+0x43/0xc0 kthread+0xf6/0x1f0 ret_from_fork+0x2f/0x50 ret_from_fork_asm+0x1a/0x30

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 to before b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1Affected 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 to before 1a426abdf1c86882c9203dd8182f3b8274b89938Affected 7000507bb0d2ceb545c0a690e0c707c897d102c2 to before cceb15864e1612ebfbc10ec4e4dcd19a10c0056cAffected 6f45ef616775b0ce7889b0f6077fc8d681ab30bc to before 584a729615fa92f4de45480efb7e569d14be1516Affected 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac to before 5300e487487d7a2e3e1e6e9d8f03ed9452e4019eAffected dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 to before 1c65ae4988714716101555fe2b9830e33136d6fbAffected dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 to before d6ebcde6d4ecf34f8495fb30516645db3aea8993Affected a54091c24220a4cd847d5b4f36d678edacddbaf0Affected 5.10.235 to before 5.10.238Affected 5.15.179 to before 5.15.185Affected 6.1.129 to before 6.1.141Affected 6.6.76 to before 6.6.93Affected 6.12.13 to before 6.12.31Affected 6.13.2 to before 6.14Affected
LinuxLinux	6.14Affected before 6.14Not affected 5.10.238 through 5.10.Not affected 5.15.185 through 5.15.Not affected 6.1.141 through 6.1.Not affected 6.6.93 through 6.6.Not affected 6.12.31 through 6.12.Not affected 6.14.9 through 6.14.Not affected 6.15 and laterNot affected

Product

Versions

LinuxLinux

f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 to before b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1Affected
4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 to before 1a426abdf1c86882c9203dd8182f3b8274b89938Affected
7000507bb0d2ceb545c0a690e0c707c897d102c2 to before cceb15864e1612ebfbc10ec4e4dcd19a10c0056cAffected
6f45ef616775b0ce7889b0f6077fc8d681ab30bc to before 584a729615fa92f4de45480efb7e569d14be1516Affected
8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac to before 5300e487487d7a2e3e1e6e9d8f03ed9452e4019eAffected
dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 to before 1c65ae4988714716101555fe2b9830e33136d6fbAffected
dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 to before d6ebcde6d4ecf34f8495fb30516645db3aea8993Affected
a54091c24220a4cd847d5b4f36d678edacddbaf0Affected
5.10.235 to before 5.10.238Affected
5.15.179 to before 5.15.185Affected
6.1.129 to before 6.1.141Affected
6.6.76 to before 6.6.93Affected
6.12.13 to before 6.12.31Affected
6.13.2 to before 6.14Affected

LinuxLinux

6.14Affected
before 6.14Not affected
5.10.238 through 5.10.*Not affected
5.15.185 through 5.15.*Not affected
6.1.141 through 6.1.*Not affected
6.6.93 through 6.6.*Not affected
6.12.31 through 6.12.*Not affected
6.14.9 through 6.14.*Not affected
6.15 and laterNot affected

References

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