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CVE-2026-56000

Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d0f589374ca5c5b0d0fcb698014eb0584c972cf18b28365f35a43ec92bf51bdf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","packageName":"xwayland","product":"xwayland","repo":"https://gitlab.freedesktop.org/xorg/xserver/","vendor":"X.Org","versions":[{"lessThan":"24.1.13","status":"affected","version":"0","versionType":"rpmver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/affected/1

{"defaultStatus":"unaffected","packageName":"xorg-x11-server","product":"xorg-x11-server","repo":"https://gitlab.freedesktop.org/xorg/xserver/","vendor":"X.Org","versions":[{"lessThan":"21.1.24","status":"affected","version":"0","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","packageName":"xwayland","product":"xwayland","repo":"https://gitlab.freedesktop.org/xorg/xserver/","vendor":"X.Org","versions":[{"lessThan":"24.1.13","status":"affected","version":"0","versionType":"rpmver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/affected/1
{"defaultStatus":"unaffected","packageName":"xorg-x11-server","product":"xorg-x11-server","repo":"https://gitlab.freedesktop.org/xorg/xserver/","vendor":"X.Org","versions":[{"lessThan":"21.1.24","status":"affected","version":"0","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"CWE-416 Use after free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["patch"],"url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/2779affbdb4354e894f490e56f962527d6125043"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://www.openwall.com/lists/oss-security/2026/07/08/2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f948f74392b1cca2359cf1f069635fce90630f4a73f1eb19560c9140102f4762 · sha256:587fcf346e34a202… · /containers/cna/references/1

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.

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