Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package emacs-common (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-EMACSCOMMON-19258458
- published26 Aug 2026
- disclosed21 Aug 2026
Introduced: 21 Aug 2026
CVE-2026-77219 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream emacs-common package and not the emacs-common package as distributed by RHEL.
GNU Emacs before 31.0.91 contains an integer overflow in the PBM/PPM/PGM image loader that allows an attacker to leak heap memory contents by supplying a crafted image with large dimensions and an elevated max color index. The image loader multiplies image dimensions and channel count using signed integer arithmetic; for sufficiently large values, the result wraps to a negative number, bypassing the bounds check and causing the pixel reader to access heap memory past the end of the allocated buffer. The over-read contents are interpreted as pixel color values and rendered on screen.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2521196
- https://access.redhat.com/security/cve/CVE-2026-77219
- https://access.redhat.com/errata/RHSA-2026:84591
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81344
- https://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c
- https://github.com/emacs-mirror/emacs/releases/tag/emacs-31.0.91
- https://www.vulncheck.com/advisories/gnu-emacs-heap-over-read-via-pbm-ppm-pgm-image-loader