Read the docs
TI-2026-63780 Aliases CVE-2026-96442GHSA-hmfx-447r-rwh3

Emacs: emacs: arbitrary code execution in flymake mode

Priority LOW 35CWE-94Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 5 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-94.

Summary

A code execution flaw was found in Emacs, affecting versions prior to 31.2. The Flymake mode using language backends other than Lisp would execute arbitrary code from the edited file while performing syntax checking. Viewing or editing untrusted files using Emacs could lead to arbitrary code execution with the privileges of the user running Emacs.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00201 10th percentileScored 2026-11-07
Fix Partial GNU Emacs (GNU Emacs): 31.2Red Hat: 3 advisoriesRed Hat: 5 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GNU EmacsGNU Emacsbefore 31.231.2Patch availableCNA
Red HatRed Hat Enterprise Linux 10—1:29.4-14.el10_2.3Patch availableCNA
Red HatRed Hat Enterprise Linux 8—1:26.1-15.el8_10.4Patch availableCNA
Red HatRed Hat Enterprise Linux 8—1:26.1-15.el8_10.4Patch availableCNA
Red HatRed Hat Enterprise Linux 9—1:27.2-18.el9_8.3Patch availableCNA
Red HatRed Hat Enterprise Linux 6——No fix listedCNA
Red HatRed Hat Enterprise Linux 7——No fix listedCNA
  • GNU Emacs VendorGNU Emacs Affected before 31.2 Fixed in 31.2 Patch available CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 1:29.4-14.el10_2.3 Patch available CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1:26.1-15.el8_10.4 Patch available CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1:26.1-15.el8_10.4 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1:27.2-18.el9_8.3 Patch available CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/a:redhat:enterprise_linux:8::appstream8—Red Hat
cpe:/o:redhat:enterprise_linux:8::baseos8—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
cpe:/o:redhat:rhel_els:66—Red Hat
cpe:/o:redhat:rhel_els:77—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
  • cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
  • cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat

Remediation

  • Fix · CNA GNU Emacs (GNU Emacs) Fixed in 31.2

Red Hat 3 advisories

  • RHSA-2026:90800 Released 2026-10-27 · Red Hat rating Important
    emacs security update
    • Red Hat Enterprise Linux AppStream (v. 8) emacs-1:26.1-15.el8_10.4, emacs-common-1:26.1-15.el8_10.4, emacs-lucid-1:26.1-15.el8_10.4 +2
    • Red Hat Enterprise Linux BaseOS (v. 8) emacs-1:26.1-15.el8_10.4, emacs-filesystem-1:26.1-15.el8_10.4
  • RHSA-2026:85245 Released 2026-10-19 · Red Hat rating Important
    emacs security update
    • Red Hat Enterprise Linux AppStream (v. 9) emacs-1:27.2-18.el9_8.3, emacs-common-1:27.2-18.el9_8.3, emacs-filesystem-1:27.2-18.el9_8.3 +2
  • RHSA-2026:84591 Released 2026-10-19 · Red Hat rating Important
    emacs security update
    • Red Hat Enterprise Linux AppStream (v. 10) emacs-1:29.4-14.el10_2.3, emacs-common-1:29.4-14.el10_2.3, emacs-lucid-1:29.4-14.el10_2.3 +1
    • Red Hat Enterprise Linux BaseOS (v. 10) emacs-1:29.4-14.el10_2.3, emacs-filesystem-1:29.4-14.el10_2.3

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:84591
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:90800
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:85245
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:84591
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:90800

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-96442
  2. 2026-10-03 Alias added: GHSA-hmfx-447r-rwh3
  3. 2026-10-19 Fix available: emacs@1:29.4-14.el10_2.3 · CNA
  4. 2026-10-19 1 new reference · CNA
  5. 2026-10-19 Fix available: RHSA-2026:84591 · Red Hat
  6. 2026-10-19 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · Red Hat
  7. 2026-10-20 Fix available: RHSA-2026:85245 · Red Hat
  8. 2026-10-20 Fix available: emacs@1:27.2-18.el9_8.3 · CNA
  9. 2026-10-20 1 new reference · CNA
  10. 2026-10-20 Fix available: Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  11. 2026-10-27 Fix available: emacs@1:26.1-15.el8_10.4 · CNA
  12. 2026-10-27 1 new reference · CNA
  13. 2026-10-27 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8) · Red Hat
  14. 2026-10-29 Fix available: RHSA-2026:90800 · Red Hat

References

Advisory 3

Other 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences