HighFix available
libde265 — security advisory
libde265 commit 4d45a6b contains a NULL pointer dereference vulnerability in the NAL parsing path. When de265_push_NAL() is called with a zero-length NAL unit, the resulting NAL_unit may retain a NULL backing buffer, which is subsequently passed as the destination argument to memcpy() in NAL_unit::set_data(). Although the copy length is zero, this violates the nonnull requirement of memcpy() and results in undefined behavior, causing process termination in UBSan-instrumented builds and denial of service.
- Products
- libde265
- Affected versions
- 1.0.12-2, 1.0.13-1, 1.0.15-1, 1.0.15-1build1, 1.0.15-1build2, 1.0.15-1build3, 1.0.15-1ubuntu0.1, 1.0.16-1, 1.0.16-1build1, 1.0.16-1ubuntu0.1~esm1, 1.0.2-1build1, 1.0.2-2, 1.0.2-2build1, 1.0.2-2ubuntu0.16.04.1~esm1, 1.0.2-2ubuntu0.16.04.1~esm2, 1.0.2-2ubuntu0.16.04.1~esm3, 1.0.2-2ubuntu0.16.04.1~esm4, 1.0.2-2ubuntu0.16.04.1~esm5, 1.0.2-2ubuntu0.16.04.1~esm6, 1.0.2-2ubuntu0.18.04.1~esm1, 1.0.2-2ubuntu0.18.04.1~esm2, 1.0.2-2ubuntu0.18.04.1~esm3, 1.0.2-2ubuntu0.18.04.1~esm4, 1.0.2-2ubuntu0.18.04.1~esm5, 1.0.2-2ubuntu0.18.04.1~esm6, 1.0.3-1build1, 1.0.4-1, 1.0.4-1build1, 1.0.4-1ubuntu0.1, 1.0.4-1ubuntu0.2, 1.0.4-1ubuntu0.3, 1.0.4-1ubuntu0.4, 1.0.4-1ubuntu0.4+esm1, 1.0.4-1ubuntu0.4+esm2, 1.0.8-1, 1.0.8-1ubuntu0.1, 1.0.8-1ubuntu0.2, 1.0.8-1ubuntu0.3, 1.0.8-1ubuntu0.3+esm1, 1.0.8-1ubuntu0.3+esm2
- Fixed versions
- 1.0.15-1ubuntu0.2, 1.0.16-1ubuntu0.1~esm2, 1.0.2-2ubuntu0.16.04.1~esm7, 1.0.2-2ubuntu0.18.04.1~esm7, 1.0.4-1ubuntu0.4+esm3, 1.0.8-1ubuntu0.3+esm3
- CVEs
- CVE-2026-88373
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 13:10 UTC · Revision 1
Source evidence
libde265 commit 4d45a6b contains a NULL pointer dereference vulnerability in the NAL parsing path. When de265_push_NAL() is called with a zero-length NAL unit, the resulting NAL_unit may retain a NULL backing buffer, which is subsequently passed as the destination argument to memcpy() in NAL_unit::set_data(). Although the copy length is zero, this violates the nonnull requirement of memcpy() and results in undefined behavior, causing process termination in UBSan-instrumented builds and denial of service.
osv:UBUNTU-CVE-2026-88373
libde265
Fixed versions: 1.0.2-2ubuntu0.16.04.1~esm7
libde265
Fixed versions: 1.0.2-2ubuntu0.18.04.1~esm7
libde265
Fixed versions: 1.0.4-1ubuntu0.4+esm3
libde265
Fixed versions: 1.0.8-1ubuntu0.3+esm3
libde265
Fixed versions: 1.0.15-1ubuntu0.2
libde265
Fixed versions: 1.0.16-1ubuntu0.1~esm2
Complete source record
{
"id": "15a30c7df342c97af9b454641de6474a346b165530e479e4eba1536988b8ad89",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-88373",
"method": "structured",
"payload": {
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"value": "1.0.4-1ubuntu0.4",
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{
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{
"value": "1.0.15-1build2",
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{
"value": "1.0.15-1build3",
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"name": {
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"value": "1.0.16-1ubuntu0.1~esm2",
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"value": "1.0.16-1",
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"value": "1.0.16-1build1",
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"availability": "No subscription required"
}
},
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"package": {
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"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
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}
],
"modified": "2026-10-10T01:00:03.151476194Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-88373",
"https://www.cve.org/CVERecord?id=CVE-2026-88373",
"https://ubuntu.com/security/notices/USN-8909-1"
]
},
"related_cves": [
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"value": "CVE-2026-88373",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 124837,
"published_at": "2026-09-24T17:17:00+00:00"
}