RHSA-2026:18048HighCVSS 8.2

Red Hat Security Advisory: jq security update

Published
May 18, 2026
Last Modified
October 2, 2026

🔗 CVE IDs covered (2)

CVE-2026-39979 →CVE-2026-40164 →

📋 Description

CVE-2026-39979 — jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers CVE-2026-40164 — jq: jq: Denial of Service via crafted JSON object causing hash collisions

🎯 Affected products16

  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-0:1.5-12.el8_4.5.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-0:1.5-12.el8_4.5.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-debuginfo-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-debuginfo-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-debuginfo-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-debuginfo-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-debugsource-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-debugsource-0:1.5-12.el8_4.5.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • jq-debugsource-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • jq-debugsource-0:1.5-12.el8_4.5.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To mitigate this issue, manually ensure that every buffer is NUL-terminated before passing it to the 'jv_parse_sized' function. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (5)