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CVE-2026-49337

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:461e9408bfa407cd3ed8ff9a15d58f7455a99a721b03786b4828112613c05925
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":"< 1.0.20"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"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:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /containers/adp/0/references/0
{"name":"https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:688efb0fd16e6ff9f261c237c19b64151098191a11b0c040bda13919febd61ff · sha256:c6d7c69e680df37d… · /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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