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Medium RHSA-2026:90996 1 CVE

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published Nov 13, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 3

ReleasePackageFixed in
Red Hat · Hardened Images 1 hummingbird:1 zchunk 0:1.5.5-1.hum1
Red Hat · Hardened Images 1 hummingbird:1 zchunk-devel 0:1.5.5-1.hum1
Red Hat · Hardened Images 1 hummingbird:1 zchunk-libs 0:1.5.5-1.hum1

Vulnerabilities 1

  • Medium 4.3
    CVE-2026-117556

    zchunk before 1.5.5 Heap Out-of-Bounds Read via read_preface()

    zchunk before 1.5.5 contains a heap out-of-bounds read vulnerability in read_preface() in src/lib/header.c that passes the total header length instead of remaining bytes to compint parsing functions. Attackers can supply a crafted .zck file whose header ends …

    zchunk zchunk zchunk zchunk Debian Ubuntu Azure Linux

References

  • article
    https://images.redhat.com/
  • report
    https://access.redhat.com/security/cve/CVE-2026-117556
  • article
    https://access.redhat.com/security/updates/classification/
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_90996.json
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2561968
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-117556
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-117556
  • article
    https://github.com/zchunk/zchunk
  • article
    https://github.com/zchunk/zchunk/blob/1.5.4/src/lib/header.c#L167
  • article
    https://github.com/zchunk/zchunk/commit/02b371a64bf98245df97315d07c684a0ca5ea1df
  • article
    https://github.com/zchunk/zchunk/issues/119
  • article
    https://github.com/zchunk/zchunk/releases/tag/1.5.5
  • article
    https://www.vulncheck.com/advisories/zchunk-before-1.5.5-heap-out-of-bounds-read-via-read-preface