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CVE-2026-90263 btrfs: check if root is readonly when setting posix acl

🗓️ 17 Sep 2026 16:08:00Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

btrfs in Linux kernel allows setting POSIX ACL on read-only root via missing readonly check.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-90263
17 Sep 202616:08
cve
debiancve
Debian CVE
CVE-2026-90263
17 Sep 202616:08
debiancve
euvd
EUVD
EUVD-2026-81856
17 Sep 202616:08
euvd
nvd
NVD
CVE-2026-90263
17 Sep 202617:17
nvd
osv
OSV
AZL-102465 CVE-2026-90263 affecting package kernel 6.6.150.1-1
17 Sep 202617:17
osv
osv
OSV
DEBIAN-CVE-2026-90263
17 Sep 202617:17
osv
osv
OSV
UBUNTU-CVE-2026-90263
18 Sep 202600:00
osv
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/btrfs/acl.c"
    ],
    "versions": [
      {
        "version": "353c2ea735e4b54fb6250861e67b51b1bcb47198",
        "lessThan": "d5602f96ff1e266f069b4d0d94f441050e057e06",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "353c2ea735e4b54fb6250861e67b51b1bcb47198",
        "lessThan": "01c2f41fc441f75b3f9326443372faceb1cb6638",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/btrfs/acl.c"
    ],
    "versions": [
      {
        "version": "5.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.2",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.6",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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17 Sep 2026 16:08Current
EPSS0.00189
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