VulnerabilityDeferred
CVE-2025-49177
The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
MEDIUM 6.1EPSS 0.41%
Does this matter?
Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.
Description
A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2025:10258
- https://access.redhat.com/errata/RHSA-2025:9303
- https://access.redhat.com/errata/RHSA-2025:9304
- https://access.redhat.com/security/cve/CVE-2025-49177
- https://bugzilla.redhat.com/show_bug.cgi?id=2369955
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/ab02fb96b1c701c3bb47617d965522c34befa6af
- https://www.x.org/wiki/Development/Security/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.