{"id":"CVE-2025-38031","title":"padata: do not leak refcount in reorder_work","summary":"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 unconditi…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 < b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1","Linux >= 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 < 1a426abdf1c86882c9203dd8182f3b8274b89938","Linux >= 7000507bb0d2ceb545c0a690e0c707c897d102c2 < cceb15864e1612ebfbc10ec4e4dcd19a10c0056c","Linux >= 6f45ef616775b0ce7889b0f6077fc8d681ab30bc < 584a729615fa92f4de45480efb7e569d14be1516","Linux >= 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac < 5300e487487d7a2e3e1e6e9d8f03ed9452e4019e","Linux >= dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 < 1c65ae4988714716101555fe2b9830e33136d6fb","Linux >= dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 < d6ebcde6d4ecf34f8495fb30516645db3aea8993","Linux a54091c24220a4cd847d5b4f36d678edacddbaf0","Linux >= 5.10.235 < 5.10.238","Linux >= 5.15.179 < 5.15.185","Linux >= 6.1.129 < 6.1.141","Linux >= 6.6.76 < 6.6.93","Linux >= 6.12.13 < 6.12.31","Linux >= 6.13.2 < 6.14","Linux 6.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:48:22.271516Z"},"published":"2025-06-18","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:52:12.934Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38031","references":[{"url":"https://git.kernel.org/stable/c/b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1"},{"url":"https://git.kernel.org/stable/c/1a426abdf1c86882c9203dd8182f3b8274b89938"},{"url":"https://git.kernel.org/stable/c/cceb15864e1612ebfbc10ec4e4dcd19a10c0056c"},{"url":"https://git.kernel.org/stable/c/584a729615fa92f4de45480efb7e569d14be1516"},{"url":"https://git.kernel.org/stable/c/5300e487487d7a2e3e1e6e9d8f03ed9452e4019e"},{"url":"https://git.kernel.org/stable/c/1c65ae4988714716101555fe2b9830e33136d6fb"},{"url":"https://git.kernel.org/stable/c/d6ebcde6d4ecf34f8495fb30516645db3aea8993"}],"tags":["cve.org"],"epss":0.00214,"epssPercentile":0.11813,"ingestedAt":"2026-11-05T22:38:31.909Z","slug":"CVE-2025-38031","body":"## Overview\n\nIn 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\n\n## Affected\n\n- `Linux >= f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 < b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1`\n- `Linux >= 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 < 1a426abdf1c86882c9203dd8182f3b8274b89938`\n- `Linux >= 7000507bb0d2ceb545c0a690e0c707c897d102c2 < cceb15864e1612ebfbc10ec4e4dcd19a10c0056c`\n- `Linux >= 6f45ef616775b0ce7889b0f6077fc8d681ab30bc < 584a729615fa92f4de45480efb7e569d14be1516`\n- `Linux >= 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac < 5300e487487d7a2e3e1e6e9d8f03ed9452e4019e`\n- `Linux >= dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 < 1c65ae4988714716101555fe2b9830e33136d6fb`\n- `Linux >= dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 < d6ebcde6d4ecf34f8495fb30516645db3aea8993`\n- `Linux a54091c24220a4cd847d5b4f36d678edacddbaf0`\n- `Linux >= 5.10.235 < 5.10.238`\n- `Linux >= 5.15.179 < 5.15.185`\n- `Linux >= 6.1.129 < 6.1.141`\n- `Linux >= 6.6.76 < 6.6.93`\n- `Linux >= 6.12.13 < 6.12.31`\n- `Linux >= 6.13.2 < 6.14`\n- `Linux 6.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}