CVE-2026-64370 (GCVE-0-2026-64370)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-09-08 08:50
VLAI
Title
posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path
Summary
In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak. Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < afed3cdc1cca133f804fcf57ff228974f424b23a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8a270b1258797f61b61da44f8bfd41a581b5c85b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d605d00085adc3fddf67de01dc2a44aebf1a3fb5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e5ffc638faf5dc7d9dc85c9a95e10bf97442e0c0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < eb4cec29a78334d09bcfb41c0660cdd62ba05843 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7776f9226e99eb49d97492b0b445027cfcb189da (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8f06363446c5d043c9a7c008b250040e9de98cf9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 87bd2ad568e15b90d5f7d4bcd70342d05dad649c (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  },
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                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*",
                    "matchCriteriaId": "6F62EECE-8FB1-4D57-85D8-CB9E23CF313C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "4F76C298-81DC-43E4-8FC9-DC005A2116EF",
                    "vulnerable": true
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                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "0AB349B2-3F78-4197-882B-90ADB3BF645A",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "6AC88830-A9BC-4607-B572-A4B502FC9FD0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*",
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                    "vulnerable": true
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                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path\n\nIn do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference\nvia get_pid() and stores it in timer.it.cpu.pid. If the subsequent\nposix_cpu_timer_set() call fails, the function returns immediately\nwithout calling posix_cpu_timer_del() to release the pid reference,\ncausing a leak.\n\nFix it by calling posix_cpu_timer_del() before the unlock-and-return\non the error path, consistent with the other exit paths in the same\nfunction."
          }
        ],
        "id": "CVE-2026-64370",
        "lastModified": "2026-09-08T15:23:56.573",
        "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": "2026-07-25T10:17:19.880",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7776f9226e99eb49d97492b0b445027cfcb189da"
          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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          },
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            "tags": [
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            "tags": [
              "Patch"
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          },
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            "tags": [
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          },
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            "tags": [
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          },
          {
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            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/eb4cec29a78334d09bcfb41c0660cdd62ba05843"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.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": "Low",
      "current_release_date": "2026-09-08T23:08:21+00:00",
      "cve": "CVE-2026-64370",
      "id": "CVE-2026-64370",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64370.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:50:56Z",
      "cve": "CVE-2026-64370",
      "id": "CVE-2026-64370",
      "initial_release_date": "2026-07-25T16:00:47Z",
      "product_status:known_affected": "279",
      "product_status:known_not_affected": "97",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64370",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64370.json",
      "version": "8"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.