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CVE-2023-1393
A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys…
High7.8EPSS 0.38%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.
Timeline
ID reserved
By redhat
- 16 days later
· 16 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.38% · top 67% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
xorg-server
- affected xorg-server 21.1.8
References (11)
- https://www.openwall.com/lists/oss-security/2023/03/29/1 (opens in a new tab)x_transferred
- FEDORA-2023-eb3c27ff25 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-b7835960ac (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-b87fd3a628 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-f754e7abfd (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-66d5af0278 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-239bae4b57 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-fe18ae3e85 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2023-6f3f9ee721 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202305-30 (opens in a new tab)vendor-advisoryx_transferred
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/26ef545b3502f61ca722a7a3373507e88ef64110 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-1393)Record last updated .