CVE-2026-50262: Red Hat Enterprise Linux 10 · Out-of-bounds Read
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 5.5 Medium.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 5 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10xorg-x11-server-Xwayland | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportxorg-x11-server-Xwayland | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONtigervnc | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportxorg-x11-server | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supporttigervnc | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8xorg-x11-server-Xwayland | Affected– | Fixed in– |
AI-suggested
A security update fixing this vulnerability is available from Red Hat as detailed in advisory RHSA-2026:26562. Applying the official patch to the xorg-x11-server and xorg-x11-server-Xwayland packages will remediate the issue. No additional mitigation steps are required as the vendor has provided an official fix.
Description
CVE-2026-50262 is an out-of-bounds read vulnerability in the X.Org X server and Xwayland components of Red Hat Enterprise Linux 10. The flaw occurs in the __glXDisp_ChangeDrawableAttributes() function due to improper size validation, allowing reading beyond the intended buffer and potentially disclosing information. A related write path exists but requires byte-swapped clients, which are disabled by default. The vulnerability has a medium severity with a CVSS score of 5.5. Red Hat has issued an advisory including a security update that addresses this and several other related X.Org X server vulnerabilities.
References
- access.redhat.com/errata/RHSA-2026:26562 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26566 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26590 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26610 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26709 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28923 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29844 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36083 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36085 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36086 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36087 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36632 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36633 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36634 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36768 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36791 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36792 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36798 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:38502 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:38810 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46377 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46382 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46385 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46392 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46456 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46460 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:46473 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:49519 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-50262 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2485387 (opens in a new tab)
- gitlab.freedesktop.org/xorg/xserver/-/commit/6d459e4daf715bea8abdafa8fb130be2f8a1d145 (opens in a new tab)
- lists.x.org/archives/xorg-announce/2026-June/003702.html (opens in a new tab)
- redhat.atlassian.net/browse/PSIRTSUPT-16950 (opens in a new tab)