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CVE-2026-33165

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in versio
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8df9ff5212cdc2858fc106394910474af31f6d5c43e014ba02e7f14d1f410454
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"libde265","vendor":"strukturag","versions":[{"status":"affected","version":"< 1.0.17"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/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:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /containers/cna/references/1
{"name":"https://github.com/strukturag/libde265/releases/tag/v1.0.17","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libde265/releases/tag/v1.0.17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /containers/cna/references/2
{"name":"https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:31c1e73bdcd9a42871dd7365b42fdb17499084990aa011e9305d841aaf04023a · sha256:516add0bd53882bc… · /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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