{"id":"CVE-2026-124307","aliases":["EUVD-2026-119279","GHSA-crhc-4fp3-m233"],"status":"published","title":"Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","severity":{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0011,"percentile":0.01294,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-11-07T14:17:50Z","modified":"2026-11-10T10:46:15Z","products":[{"vendor":"fraunhoferhhi","product":"vvdec"}],"references":[{"url":"https://github.com/fraunhoferhhi/vvdec/issues/391","tags":["issue-tracking","report"]},{"url":"https://github.com/fraunhoferhhi/vvdec/issues/390","tags":["issue-tracking","report"]},{"url":"https://github.com/fraunhoferhhi/vvdec/commit/1eddb30c4b8e02f3d13ba24aa7e52f1aa7b08c01","tags":["patch","fix"]},{"url":"https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/Slice.h#L2570","tags":["technical-description","article"]},{"url":"https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/ParameterSetManager.h#L97","tags":["technical-description","article"]},{"url":"https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/CABACReader.cpp#L428-L429","tags":["technical-description","article"]},{"url":"https://github.com/fraunhoferhhi/vvdec","tags":["product","package"]},{"url":"https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-heap-use-after-free-via-alf-aps-redefinition","tags":["third-party-advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/11/09/21","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124307","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-crhc-4fp3-m233"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124307.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-124307","title":"Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","status":"published","published":"2026-11-07T14:17:50.302Z","modified":"2026-11-09T22:41:36.454Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-09T21:34:55.566109Z"}],"euvd":[{"id":"EUVD-2026-119279","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","status":"published","published":"2026-11-07T14:17:50Z","modified":"2026-11-09T22:41:36Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-07T18:10:08.696559Z"}],"ghsa":[{"id":"GHSA-crhc-4fp3-m233","title":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows...","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","status":"published","published":"2026-11-07T15:30:29Z","modified":"2026-11-09T21:31:46Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"medium"}],"cwes":["CWE-416"],"updated_at":"2026-11-09T21:50:03.505275Z"}],"nvd":[{"id":"CVE-2026-124307","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","status":"published","published":"2026-11-07T15:17:14.28Z","modified":"2026-11-09T23:17:19.117Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-09T22:15:55.053522Z"}],"osv":[{"id":"CVE-2026-124307","title":"Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition","description":"Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.","status":"published","published":"2026-11-07T14:17:50.302Z","modified":"2026-11-10T10:46:15.863875761Z","cvss":[{"version":"4.0","score":5.8,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T10:57:25.458985Z"}]}}