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High8.2Red Hat Linux

High [CVE-2026-39979] out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers

This high-severity Red Hat Linux advisory covers CVE-2026-39979 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

CVE-2026-39979 Published Apr 13, 2026
CVE-2026-39979
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers. Red Hat rates this important (CVSS 8.2).

Weakness: CWE-125. Affected package(s): rhaiis/model-opt-cuda-rhel9:1782352950, rhaiis/vllm-spyre-rhel9:1782352919, jq, rhcos, rhaiis/model-opt-cuda-rhel9:1780681984, rhaiis/vllm-rocm-rhel9:1782353093.

Resolved in Red Hat advisory RHSA-2026:26542 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 21 more.

Affected versions
  • rhaiis/model-opt-cuda-rhel9:1782352950
  • rhaiis/vllm-spyre-rhel9:1782352919
  • jq-0:1.6-12.el9_0.3
  • jq-0:1.6-15.el9_2.3
  • rhcos-414.92.202606231112-0
  • jq-0:1.6-16.el9_4.2
  • rhcos-418.94.202606051320-0
  • rhcos-4.19.9.6.202606031700-0
  • rhcos-412.86.202606140301-0
  • jq-0:1.6-19.el9_8.2
  • jq-0:1.6-17.el9_6.4
  • jq-0:1.7.1-11.el10_1.0.2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:26542

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:26542 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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