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CVE-2026-4426

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d350cccc0d92c29c0eaa0fad9d90a296ae1c4f4f029cb42c57281b214bf10545
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"libarchive","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/2

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"libarchive-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"3.8.7-1.hum1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/6

Affected products and versions

7 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"libarchive","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/2
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"libarchive-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"3.8.7-1.hum1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"libarchive","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/affected/6

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1335","description":"Incorrect Bitwise Shift of Integer","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"RHSA-2026:8944","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8944"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/references/0
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-4426"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/references/1
{"name":"RHBZ#2449010","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2449010"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/references/2
{"url":"https://github.com/libarchive/libarchive/pull/2897"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:777fa36d11d73ed8584200db12436849531da9e313390e91f6da67a1454437c3 · sha256:7f64a1c9f65efe77… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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