CVE-2026-77219
GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader
02 Description
GNU Emacs < 31.0.91 Heap Over-Read via PBM/PPM/PGM Image Loader
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.12% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 2.0% of scored records. A rank, not a probability.
- NVD base score
- 6.9 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-12.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-21 20:20Z2 MO AGO
- Last updated
- 2026-10-01 15:21Z27 DAYS AGO
- Reserved
- 2026-08-20
- Assigning CNA
- VulnCheck
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.9)
- CNA CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- Data version
- 5.2
- Document digest
- d26d5f967b8dd2b47264dc67fe2920d809eb62b30d463a02aa548e8eefcb6586
05 Affected products
06 References
- debbugs.gnu.orgBug Reporthttps://debbugs.gnu.org/cgi/bugreport.cgi?bug=81344
- github.comRelease Taghttps://github.com/emacs-mirror/emacs/releases/tag/emacs-31.0.91
- github.comPatch Commithttps://github.com/emacs-mirror/emacs/commit/b07e634e4cf45162ae0178e32092b040587f2c6c
- www.vulncheck.comhttps://www.vulncheck.com/advisories/gnu-emacs-heap-over-read-via-pbm-ppm-pgm-image-loader
07 Fixed in
AlmaLinux 8
- emacs Fixed in 1:26.1-15.el8_10.2
- emacs-common Fixed in 1:26.1-15.el8_10.2
- emacs-filesystem Fixed in 1:26.1-15.el8_10.2
- emacs-lucid Fixed in 1:26.1-15.el8_10.2
- emacs-nox Fixed in 1:26.1-15.el8_10.2
- emacs-terminal Fixed in 1:26.1-15.el8_10.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- emacs Fixed in 1:27.2-18.el9_8.2
- emacs-common Fixed in 1:27.2-18.el9_8.2
- emacs-filesystem Fixed in 1:27.2-18.el9_8.2
- emacs-lucid Fixed in 1:27.2-18.el9_8.2
- emacs-nox Fixed in 1:27.2-18.el9_8.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- emacs Fixed in 1:29.4-14.el10_2.3
- emacs-common Fixed in 1:29.4-14.el10_2.3
- emacs-filesystem Fixed in 1:29.4-14.el10_2.3
- emacs-lucid Fixed in 1:29.4-14.el10_2.3
- emacs-nw Fixed in 1:29.4-14.el10_2.3
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- emacs Fixed in 1:26.1-15.el8_10.2
- emacs-common Fixed in 1:26.1-15.el8_10.2
- emacs-filesystem Fixed in 1:26.1-15.el8_10.2
- emacs-lucid Fixed in 1:26.1-15.el8_10.2
- emacs-nox Fixed in 1:26.1-15.el8_10.2
- emacs-terminal Fixed in 1:26.1-15.el8_10.2
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- emacs Fixed in 1:27.2-18.el9_8.2
- emacs-common Fixed in 1:27.2-18.el9_8.2
- emacs-filesystem Fixed in 1:27.2-18.el9_8.2
- emacs-lucid Fixed in 1:27.2-18.el9_8.2
- emacs-nox Fixed in 1:27.2-18.el9_8.2
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- emacs Fixed in 1:29.4-14.el10_2.3
- emacs-common Fixed in 1:29.4-14.el10_2.3
- emacs-filesystem Fixed in 1:29.4-14.el10_2.3
- emacs-lucid Fixed in 1:29.4-14.el10_2.3
- emacs-nw Fixed in 1:29.4-14.el10_2.3
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- emacs No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- emacs No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- emacs No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- emacs No fix yet
- xemacs21 No fix yet
- xemacs21-packages No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- emacs24 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- emacs25 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- emacs No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- emacs No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- emacs No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 26.04 LTS
- emacs No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.