CVE catalog

CVE-2026-88265

A flaw was found in crun. After pivot_root, reopening…

A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

Severity: High · CVSS 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published: Sep 9, 2026, 12:00:00 AM UTC
Updated: Sep 10, 2026, 9:17:03 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.12% · Oct 27, 2026

Projects and upstream resources

[crun][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debiantrixie	crun	`1.21-1`	Affected	[CVE-2026-88265]
Debiansid	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debiansid	crun	`1.28-1`	Affected	[CVE-2026-88265]
Debianforky	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debianforky	crun	`1.28-1`	Affected	[CVE-2026-88265]
Debianbookworm	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debianbookworm	crun	`1.8.1-1+deb12u1`	Affected	[CVE-2026-88265]

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debianbookworm	crun	`1.8.1-1+deb12u1`	Affected	[CVE-2026-88265]
Debianforky	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debianforky	crun	`1.28-1`	Affected	[CVE-2026-88265]
Debiansid	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debiansid	crun	`1.28-1`	Affected	[CVE-2026-88265]
Debiantrixie	crun	Not reported	AffectedDistribution reports no fix	[CVE-2026-88265]
Debiantrixie	crun	`1.21-1`	Affected	[CVE-2026-88265]

Original provider fields

{
  "package_releases": [
    {
      "name": "crun",
      "status": "vulnerable",
      "release": "sid",
      "version": "1.28-1"
    },
    {
      "name": "crun",
      "status": "vulnerable",
      "release": "forky",
      "version": "1.28-1"
    },
    {
      "name": "crun",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1.21-1"
    },
    {
      "name": "crun",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.8.1-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1147401,
      "name": "crun",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1147401,
      "name": "crun",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1147401,
      "name": "crun",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1147401,
      "name": "crun",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

[Debian bug #1147401]

Publisher notes

[trixie] crun: Minor issue, revisit when fixed upstream [bookworm] crun: Minor issue, revisit when fixed upstream

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[crun]Unknown
Details (2)
- 1.8.1-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · crun · debian · bookworm; nvd · crun · debian · 12
- 1.8.1-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · crun · debian · bookworm; nvd · crun · debian · 12

[Debian 13 (Trixie)]

[crun]Unknown
Details (2)
- 1.21-1 · amd64 · trixie
  Affected
  nvd · crun · debian · 13
- 1.21-1 · arm64 · trixie
  Affected
  nvd · crun · debian · 13

Observed: Oct 23, 2026, 9:28:27 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]