CVE-2026-80756 (GCVE-0-2026-80756)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-11-06 17:05
VLAI
Title
selinux: do not cancel a policy conversion that never started
Summary
In the Linux kernel, the following vulnerability has been resolved: selinux: do not cancel a policy conversion that never started sel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes() fails, and that helper dereferences the outgoing policy to cancel its sidtab conversion. On the first policy load there is no outgoing policy: security_load_policy() returns early for that case, before it converts anything, and state->policy is still NULL. A first load that fails while building the selinuxfs tree therefore takes a NULL dereference in selinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load. Skip the cancel when there is no old policy, mirroring the check security_load_policy() already makes before it converts.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:03 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 2d29983104f06f5b0babcd5a25a0f0408272cd27 (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < a4f182f8715cb0819445f0850cd5436828f4bafc (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1059789ae9f99cbbe3a78e361e9c0976beb5958b (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1acc317d67a755a45e32419a15d70e403fa43f0e (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < a42932c6aa33d0aac683cacdf1ec7009b955ba5d (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1b4ff94ae7c580c880291519fb0e3e2bd075beef (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7 (git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.266 , ≤ 5.10.* (semver)
Unaffected: 5.15.217 , ≤ 5.15.* (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.153 , ≤ 6.6.* (semver)
Unaffected: 6.12.105 , ≤ 6.12.* (semver)
Unaffected: 6.18.46 , ≤ 6.18.* (semver)
Unaffected: 7.1.10 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                    "timestamp": "2026-11-06T17:03:09.106850Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-11-06T17:03:10.305Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "security/selinux/ss/services.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "2d29983104f06f5b0babcd5a25a0f0408272cd27",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "a4f182f8715cb0819445f0850cd5436828f4bafc",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "1059789ae9f99cbbe3a78e361e9c0976beb5958b",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "1acc317d67a755a45e32419a15d70e403fa43f0e",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "a42932c6aa33d0aac683cacdf1ec7009b955ba5d",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "1b4ff94ae7c580c880291519fb0e3e2bd075beef",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "219c96de5d9b6b4af7e8576ad897b774cc3ee9a7",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                },
                {
                  "lessThan": "e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e",
                  "status": "affected",
                  "version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "security/selinux/ss/services.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.10"
                },
                {
                  "lessThan": "5.10",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.266",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.217",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.184",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.153",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.105",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.46",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.1.*",
                  "status": "unaffected",
                  "version": "7.1.10",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "7.2",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.266",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.217",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.184",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.153",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.105",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.46",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.1.10",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.2",
                      "versionStartIncluding": "5.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: do not cancel a policy conversion that never started\n\nsel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()\nfails, and that helper dereferences the outgoing policy to cancel its\nsidtab conversion. On the first policy load there is no outgoing policy:\nsecurity_load_policy() returns early for that case, before it converts\nanything, and state-\u003epolicy is still NULL. A first load that fails while\nbuilding the selinuxfs tree therefore takes a NULL dereference in\nselinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load.\n\nSkip the cancel when there is no old policy, mirroring the check\nsecurity_load_policy() already makes before it converts."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-03T08:26:34.396Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27"
            },
            {
              "url": "https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc"
            },
            {
              "url": "https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b"
            },
            {
              "url": "https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e"
            },
            {
              "url": "https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d"
            },
            {
              "url": "https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef"
            },
            {
              "url": "https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"
            },
            {
              "url": "https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"
            }
          ],
          "title": "selinux: do not cancel a policy conversion that never started",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-80756",
        "datePublished": "2026-09-03T08:26:34.396Z",
        "dateReserved": "2026-08-26T14:34:25.791Z",
        "dateUpdated": "2026-11-06T17:05:53.807Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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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.
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  • 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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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