CVE-2025-38031: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 5.10.235, before 5.10.238 (fixed in 5.10.238); from 5.15.179, before 5.15.185 (fixed in 5.15.185); from 6.1.129, before 6.1.141 (fixed in 6.1.141); from 6.6.76, before 6.6.93 (fixed in 6.6.93); from 6.12.13, before 6.12.31 (fixed in 6.12.31); from 6.13.2, before 6.14.9 (fixed in 6.14.9); …

Published 2025-06-18. Last modified 2026-06-17.