Description
A flaw was found in xdgmime. A heap-based buffer overflow can be triggered in _xdg_mime_magic_parse_magic_line() in the xdgmimemagic.c file on little-endian systems when an attacker-controlled MIME magic file in a user-writable XDG data location (e.g., in the $XDG_DATA_HOME/mime/magic path) is parsed by an application performing MIME type detection (e.g., via g_content_type_guess()). When performing byte-swap, incorrect pointer arithmetic on the write side causes an out-of-bounds write of 2 bytes, resulting in an application crash or memory corruption.
References10
- access.redhat.com/errata/RHSA-2026:64799
- access.redhat.com/errata/RHSA-2026:64800
- access.redhat.com/errata/RHSA-2026:66451
- access.redhat.com/errata/RHSA-2026:67956
- access.redhat.com/errata/RHSA-2026:70636
- access.redhat.com/errata/RHSA-2026:71403
- access.redhat.com/errata/RHSA-2026:71404
- access.redhat.com/errata/RHSA-2026:71405
- access.redhat.com/errata/RHSA-2026:72394
- access.redhat.com/errata/RHSA-2026:72395
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H - EPSS — exploit probability
- 0% percentile: 20 · as of 14 November 2026
- CWE
- CWE-122
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