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CVE-2026-80809 (GCVE-0-2026-80809)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-09-04 15:13
VLAI
Title
ocfs2: fix missing metadata reservation for large xattrs
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix missing metadata reservation for large xattrs [BUG] lsetxattr() panics the kernel when setting a large xattr value on a fragmented filesystem where the file already has an external xattr block. [CAUSE] ocfs2_calc_xattr_set_need() never reserves metadata blocks for a new xattr value's extent tree when the file already has an external xattr block. The not_found path leaves meta_add at zero, so meta_ac is NULL when ocfs2_xattr_extend_allocation() runs. A new value root has room for a single extent record. On a fragmented filesystem, the allocator cannot satisfy the xattr value in one contiguous run, so each non-contiguous run requires its own extent record. When the value root's extent list is full and meta_ac is NULL, ocfs2_add_clusters_in_btree() returns RESTART_META, and ocfs2_xattr_extend_allocation() hits BUG_ON(why == RESTART_META). [FIX] The case where no xattr block exists yet already calls ocfs2_extend_meta_needed(&def_xv.xv.xr_list) to reserve value tree metadata. Add the same reservation to the case where an xattr block already exists, making the two cases consistent. Replace the BUG_ON with a -ENOSPC return so that if RESTART_META is returned despite the reservation, the error propagates to userspace instead of panicking the kernel.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 743ac908282ac97ef6e73ac3a92df2cc8ecb7479 (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 04ba24bce61c917b5b3009f0db470cbb72e26a0d (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < b4663405ae29d36011cd712d243456f3f9ab700d (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 6a009f1e61b11d9e23d3c5aa1dacfb010945da45 (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 6176313622e34fa3e2b66b9d0682d1e1c6b365c5 (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < a3ccb57086dd7652d5ecb826486144198a98a8e9 (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 50f0cbec45b0f3fd7e1263d01916518dbf31eb3f (git)
Affected: a78f9f4668949a6588b8872f162e86685c63d023 , < 0cdc7dde00ec63ac714271fa8b2918d630b8da1a (git)
Affected: 92f61d8a31e270f9391e7bcc0ac638bd4262a8e0 (git)
Affected: 2.6.34.2 , < 2.6.35 (semver)
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Linux Linux Affected: 2.6.35
Unaffected: 0 , < 2.6.35 (semver)
Unaffected: 5.10.267 , ≤ 5.10.* (semver)
Unaffected: 5.15.218 , ≤ 5.15.* (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix missing metadata reservation for large xattrs\n\n[BUG]\nlsetxattr() panics the kernel when setting a large xattr value on a\nfragmented filesystem where the file already has an external xattr\nblock.\n\n[CAUSE]\nocfs2_calc_xattr_set_need() never reserves metadata blocks for a new\nxattr value\u0027s extent tree when the file already has an external xattr\nblock. The not_found path leaves meta_add at zero, so meta_ac is NULL\nwhen ocfs2_xattr_extend_allocation() runs.\n\nA new value root has room for a single extent record. On a fragmented\nfilesystem, the allocator cannot satisfy the xattr value in one\ncontiguous run, so each non-contiguous run requires its own extent\nrecord. When the value root\u0027s extent list is full and meta_ac is NULL,\nocfs2_add_clusters_in_btree() returns RESTART_META, and\nocfs2_xattr_extend_allocation() hits BUG_ON(why == RESTART_META).\n\n[FIX]\nThe case where no xattr block exists yet already calls\nocfs2_extend_meta_needed(\u0026def_xv.xv.xr_list) to reserve value tree\nmetadata. Add the same reservation to the case where an xattr block\nalready exists, making the two cases consistent.\n\nReplace the BUG_ON with a -ENOSPC return so that if RESTART_META is\nreturned despite the reservation, the error propagates to userspace\ninstead of panicking the kernel."
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On a fragmented\\nfilesystem, the allocator cannot satisfy the xattr value in one\\ncontiguous run, so each non-contiguous run requires its own extent\\nrecord. When the value root\u0027s extent list is full and meta_ac is NULL,\\nocfs2_add_clusters_in_btree() returns RESTART_META, and\\nocfs2_xattr_extend_allocation() hits BUG_ON(why == RESTART_META).\\n\\n[FIX]\\nThe case where no xattr block exists yet already calls\\nocfs2_extend_meta_needed(\u0026def_xv.xv.xr_list) to reserve value tree\\nmetadata. Add the same reservation to the case where an xattr block\\nalready exists, making the two cases consistent.\\n\\nReplace the BUG_ON with a -ENOSPC return so that if RESTART_META is\\nreturned despite the reservation, the error propagates to userspace\\ninstead of panicking the kernel.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ocfs2/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"743ac908282ac97ef6e73ac3a92df2cc8ecb7479\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"04ba24bce61c917b5b3009f0db470cbb72e26a0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"b4663405ae29d36011cd712d243456f3f9ab700d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"6a009f1e61b11d9e23d3c5aa1dacfb010945da45\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"6176313622e34fa3e2b66b9d0682d1e1c6b365c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"a3ccb57086dd7652d5ecb826486144198a98a8e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"50f0cbec45b0f3fd7e1263d01916518dbf31eb3f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a78f9f4668949a6588b8872f162e86685c63d023\",\"lessThan\":\"0cdc7dde00ec63ac714271fa8b2918d630b8da1a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"92f61d8a31e270f9391e7bcc0ac638bd4262a8e0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2.6.34.2\",\"lessThan\":\"2.6.35\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ocfs2/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.35\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.35\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.267\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.218\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.185\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.154\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.106\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04ba24bce61c917b5b3009f0db470cbb72e26a0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0cdc7dde00ec63ac714271fa8b2918d630b8da1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/50f0cbec45b0f3fd7e1263d01916518dbf31eb3f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6176313622e34fa3e2b66b9d0682d1e1c6b365c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a009f1e61b11d9e23d3c5aa1dacfb010945da45\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/743ac908282ac97ef6e73ac3a92df2cc8ecb7479\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a3ccb57086dd7652d5ecb826486144198a98a8e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b4663405ae29d36011cd712d243456f3f9ab700d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
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      "current_release_date": "2026-09-10T01:51:11Z",
      "cve": "CVE-2026-80809",
      "id": "CVE-2026-80809",
      "initial_release_date": "2026-09-05T00:26:59Z",
      "product_status:known_affected": "341",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80809",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80809.json",
      "version": "5"
    }
  }
}



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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.