CVE-2026-77219: GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader

highCVSS 7.1CVE-2026-77219

CSIRTS triage

vendor: GNU product: GNU Emacs Memory corruptionaffected: < 31.0.91

What: Heap over-read vulnerability in the PBM/PPM/PGM image loader.
Who is affected: GNU Emacs versions before 31.0.91 used to open untrusted image files.
Urgency: High severity (CVSS 7.1); memory corruption via image processing can lead to code execution or denial of service.
Action: Upgrade GNU Emacs to version 31.0.91 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77219

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-772190.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-77219	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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