CVE-2025-38031 (GCVE-0-2025-38031)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-05-23 15:58
VLAI
Title
padata: do not leak refcount in reorder_work
Summary
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0 , < b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1 (git)
Affected: 4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1 , < 1a426abdf1c86882c9203dd8182f3b8274b89938 (git)
Affected: 7000507bb0d2ceb545c0a690e0c707c897d102c2 , < cceb15864e1612ebfbc10ec4e4dcd19a10c0056c (git)
Affected: 6f45ef616775b0ce7889b0f6077fc8d681ab30bc , < 584a729615fa92f4de45480efb7e569d14be1516 (git)
Affected: 8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac , < 5300e487487d7a2e3e1e6e9d8f03ed9452e4019e (git)
Affected: dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 , < 1c65ae4988714716101555fe2b9830e33136d6fb (git)
Affected: dd7d37ccf6b11f3d95e797ebe4e9e886d0332600 , < d6ebcde6d4ecf34f8495fb30516645db3aea8993 (git)
Affected: a54091c24220a4cd847d5b4f36d678edacddbaf0 (git)
Affected: 5.10.235 , < 5.10.238 (semver)
Affected: 5.15.179 , < 5.15.185 (semver)
Affected: 6.1.129 , < 6.1.141 (semver)
Affected: 6.6.76 , < 6.6.93 (semver)
Affected: 6.12.13 , < 6.12.31 (semver)
Affected: 6.13.2 , < 6.14 (semver)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 5.10.238 , ≤ 5.10.* (semver)
Unaffected: 5.15.185 , ≤ 5.15.* (semver)
Unaffected: 6.1.141 , ≤ 6.1.* (semver)
Unaffected: 6.6.93 , ≤ 6.6.* (semver)
Unaffected: 6.12.31 , ≤ 6.12.* (semver)
Unaffected: 6.14.9 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "90320558-E553-4EF5-8A0B-0F5D20113BD2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*",
                    "matchCriteriaId": "C300BA32-5854-4B59-A00A-18A402F291D0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "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"
          },
          {
            "lang": "es",
            "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 solucion\u00f3 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 est\u00e1 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 (tama\u00f1o 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"
          }
        ],
        "id": "CVE-2025-38031",
        "lastModified": "2026-06-17T09:15:54.870",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-06-18T10:15:35.230",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1a426abdf1c86882c9203dd8182f3b8274b89938"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1c65ae4988714716101555fe2b9830e33136d6fb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5300e487487d7a2e3e1e6e9d8f03ed9452e4019e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/584a729615fa92f4de45480efb7e569d14be1516"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b9ad8e50e8589607e68e6c4cefa7f72bf35a2cb1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cceb15864e1612ebfbc10ec4e4dcd19a10c0056c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d6ebcde6d4ecf34f8495fb30516645db3aea8993"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-03T07:20:16+00:00",
      "cve": "CVE-2025-38031",
      "id": "CVE-2025-38031",
      "initial_release_date": "2025-06-18T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: padata: do not leak refcount in reorder_work",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38031.json",
      "version": "3"
    }
  }
}



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