CVE-2025-38031
Full vulnerability record from the local CVENow database.
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
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-06-18 10:15:35.230000
Last modified
2026-11-05 21:18:05.213000
View original CVE JSON
{
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-06-18T10:15:35.230",
"lastModified": "2026-11-05T21:18:05.213",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npadata: do not leak refcount in reorder_work\n\nA recent patch that addressed a UAF introduced a reference count leak:\nthe parallel_data refcount is incremented unconditionally, regardless\nof the return value of queue_work(). If the work item is already queued,\nthe incremented refcount is never decremented.\n\nFix this by checking the return value of queue_work() and decrementing\nthe refcount when necessary.\n\nResolves:\n\nUnreferenced object 0xffff9d9f421e3d80 (size 192):\n comm \"cryptomgr_probe\", pid 157, jiffies 4294694003\n hex dump (first 32 bytes):\n 80 8b cf 41 9f 9d ff ff b8 97 e0 89 ff ff ff ff ...A............\n d0 97 e0 89 ff ff ff ff 19 00 00 00 1f 88 23 00 ..............#.\n backtrace (crc 838fb36):\n __kmalloc_cache_noprof+0x284/0x320\n padata_alloc_pd+0x20/0x1e0\n padata_alloc_shell+0x3b/0xa0\n 0xffffffffc040a54d\n cryptomgr_probe+0x43/0xc0\n kthread+0xf6/0x1f0\n ret_from_fork+0x2f/0x50\n ret_from_fork_asm+0x1a/0x30"
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: padata: no se filtra el recuento de referencias en reorder_work. Un parche reciente que solucionó un UAF introdujo una fuga en el recuento de referencias: el recuento de referencias de parallel_data se incrementa incondicionalmente, independientemente del valor de retorno de queue_work(). Si el elemento de trabajo ya está en cola, el recuento incrementado nunca se decrementa. Para solucionar esto, verifique el valor de retorno de queue_work() y decremente el recuento cuando sea necesario. Resuelve: Objeto no referenciado 0xffff9d9f421e3d80 (tamaño 192): comm \"cryptomgr_probe\", pid 157, jiffies 4294694003 volcado hexadecimal (primeros 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 ..............#. seguimiento inverso (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"
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