GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-80531 (GCVE-0-2026-80531)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-27 05:01
VLAI
Title
xfs: avoid UAF on sc->tempip in xrep_tempfile_create
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: avoid UAF on sc->tempip in xrep_tempfile_create LOLLM noticed a potential UAF if the tempfile creation code fails after it set sc->tempip. Fix that.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 84c14ee39dd388d73054181c70b3f42af7ddc238 , < 08a20776ce33a2a52d856911e447c59424f0465a (git)
Affected: 84c14ee39dd388d73054181c70b3f42af7ddc238 , < cd1f876d1bc2e94f271e07c606cacd85b109108a (git)
Affected: 84c14ee39dd388d73054181c70b3f42af7ddc238 , < 96246a3200d32a43766152e56bc7ae2d93604d74 (git)
Affected: 84c14ee39dd388d73054181c70b3f42af7ddc238 , < 0c88e10d12de9ca7cbed1467bb1b52310101bff8 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (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.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/scrub/tempfile.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "08a20776ce33a2a52d856911e447c59424f0465a",
              "status": "affected",
              "version": "84c14ee39dd388d73054181c70b3f42af7ddc238",
              "versionType": "git"
            },
            {
              "lessThan": "cd1f876d1bc2e94f271e07c606cacd85b109108a",
              "status": "affected",
              "version": "84c14ee39dd388d73054181c70b3f42af7ddc238",
              "versionType": "git"
            },
            {
              "lessThan": "96246a3200d32a43766152e56bc7ae2d93604d74",
              "status": "affected",
              "version": "84c14ee39dd388d73054181c70b3f42af7ddc238",
              "versionType": "git"
            },
            {
              "lessThan": "0c88e10d12de9ca7cbed1467bb1b52310101bff8",
              "status": "affected",
              "version": "84c14ee39dd388d73054181c70b3f42af7ddc238",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/scrub/tempfile.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "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": "6.12.105",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: avoid UAF on sc-\u003etempip in xrep_tempfile_create\n\nLOLLM noticed a potential UAF if the tempfile creation code fails after\nit set sc-\u003etempip.  Fix that."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is only reachable via XFS_IOC_SCRUB_METADATA or XFS_IOC_SCRUBV_METADATA ioctl on an open XFS file descriptor (xfs_file_ioctl -\u003e xfs_ioc_scrub_metadata -\u003e xfs_scrub_metadata -\u003e xrep_setup_* -\u003e xrep_tempfile_create); it is not exposed through NFS, SMB, or other network-facing kernel services.\nAC:L - An attacker with ioctl access can deterministically hit the error path by invoking online repair (XFS_SCRUB_IFLAG_REPAIR) and forcing tempfile creation to fail after xfs_icreate sets sc-\u003etempip (e.g., ENOSPC from filling the filesystem or EIO), without races or uncontrollable victim state.\nPR:L - Both scrub ioctl handlers enforce capable(CAP_SYS_ADMIN), which is obtainable by unprivileged users who map root in a user namespace and mount their own XFS filesystem to run online scrub/repair, consistent with other XFS scrub CVE scoring.\nUI:N - Exploitation requires no victim interaction; the attacker issues the scrub/repair ioctl themselves once they have the required privileges and can induce the tempfile-creation failure.\nS:U - Impact is kernel memory corruption and crash within the same kernel security domain during XFS online repair teardown; this does not cross VM, container, or IOMMU security boundaries.\nC:H - On failure after sc-\u003etempip is set, xrep_tempfile_create releases the inode but left a dangling pointer; xchk_teardown then calls xrep_tempfile_rele which performs xfs_is_metadir_inode, xfs_iunlock, and xchk_irele on freed xfs_inode memory\u2014a use-after-free enabling arbitrary kernel read.\nI:H - The stale sc-\u003etempip is dereferenced in xrep_tempfile_rele for locking, metadir cleanup, and inode release on freed memory; UAF on xfs_inode structures can corrupt heap metadata and be leveraged for arbitrary kernel write or control-flow hijacking.\nA:H - Use-after-free on sc-\u003etempip during xchk_teardown provokes double-free, invalid inode lock operations, or kernel oops/panic when online repair setup fails after partial tempfile creation, causing complete host denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T05:01:25.229Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/08a20776ce33a2a52d856911e447c59424f0465a"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd1f876d1bc2e94f271e07c606cacd85b109108a"
        },
        {
          "url": "https://git.kernel.org/stable/c/96246a3200d32a43766152e56bc7ae2d93604d74"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c88e10d12de9ca7cbed1467bb1b52310101bff8"
        }
      ],
      "title": "xfs: avoid UAF on sc-\u003etempip in xrep_tempfile_create",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80531",
    "datePublished": "2026-08-26T14:37:08.594Z",
    "dateReserved": "2026-08-26T14:34:25.764Z",
    "dateUpdated": "2026-08-27T05:01:25.229Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80531",
      "date": "2026-09-17",
      "epss": "0.00128",
      "percentile": "0.02851"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80531\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-26T15:17:07.140\",\"lastModified\":\"2026-08-27T06:17:33.500\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfs: avoid UAF on sc-\u003etempip in xrep_tempfile_create\\n\\nLOLLM noticed a potential UAF if the tempfile creation code fails after\\nit set sc-\u003etempip.  Fix that.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/xfs/scrub/tempfile.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"84c14ee39dd388d73054181c70b3f42af7ddc238\",\"lessThan\":\"08a20776ce33a2a52d856911e447c59424f0465a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84c14ee39dd388d73054181c70b3f42af7ddc238\",\"lessThan\":\"cd1f876d1bc2e94f271e07c606cacd85b109108a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84c14ee39dd388d73054181c70b3f42af7ddc238\",\"lessThan\":\"96246a3200d32a43766152e56bc7ae2d93604d74\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"84c14ee39dd388d73054181c70b3f42af7ddc238\",\"lessThan\":\"0c88e10d12de9ca7cbed1467bb1b52310101bff8\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/xfs/scrub/tempfile.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08a20776ce33a2a52d856911e447c59424f0465a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0c88e10d12de9ca7cbed1467bb1b52310101bff8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/96246a3200d32a43766152e56bc7ae2d93604d74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd1f876d1bc2e94f271e07c606cacd85b109108a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-02T19:03:23+00:00",
      "cve": "CVE-2026-80531",
      "id": "CVE-2026-80531",
      "initial_release_date": "2026-08-26T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfs: avoid UAF on sc-\u003etempip in xrep_tempfile_create",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80531.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:12:01Z",
      "cve": "CVE-2026-80531",
      "id": "CVE-2026-80531",
      "initial_release_date": "2026-08-27T00:12:31Z",
      "product_status:known_affected": "29",
      "product_status:known_not_affected": "324",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80531",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80531.json",
      "version": "6"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.