Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-27456

util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b204e99b6fcfbf8e7e6bf6755f96d64302c3b976e28d6e0a4b298a7fc3388567
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"util-linux","vendor":"util-linux","versions":[{"status":"affected","version":"< 2.41.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/util-linux/util-linux/commit/5e390467b26a3cf3fecc04e1a0d482dff3162fc4","tags":["x_refsource_MISC"],"url":"https://github.com/util-linux/util-linux/commit/5e390467b26a3cf3fecc04e1a0d482dff3162fc4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/references/1
{"name":"https://github.com/util-linux/util-linux/releases/tag/v2.41.4","tags":["x_refsource_MISC"],"url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/references/2
{"name":"https://github.com/util-linux/util-linux/security/advisories/GHSA-qq4x-vfq4-9h9g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-qq4x-vfq4-9h9g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-qq4x-vfq4-9h9g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac219a8b0f008da101e62a25a8be83c251462bf4288c0c1156aac0753f15747e · sha256:0370686cd4f02d5e… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer