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CVE-2026-33636

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels remain. Because the implementation works backward from the end of the row, the fina
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2e4a8c7ff4b3cc541d18a58f9681abd884c042974c07782d496b11799de956a2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"libpng","vendor":"pnggroup","versions":[{"status":"affected","version":">= 1.6.36, < 1.6.56"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869","tags":["x_refsource_MISC"],"url":"https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/references/1
{"name":"https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3","tags":["x_refsource_MISC"],"url":"https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/references/2
{"name":"https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d295038c22398b23d931b3614e95f25e374eabca65c72325e5d042baa88f3e87 · sha256:14ab9719397f8bd7… · /containers/cna/references/0

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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