CVE-2026-33164: struktur libde265 Heap-based Buffer Overflow
CVSS: 8.7v4.0HighAnalyzed
AliasesALPINE-CVE-2026-33164UBUNTU-CVE-2026-33164DEBIAN-CVE-2026-33164
Published 20-03-2026Last modified 23-03-2026
Vulnerability summary
CVE-2026-33164 is a high (CVSS 8.7) Heap-based Buffer Overflow vulnerability in struktur libde265. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.7/10
010
High · v4.0 (CVE.org)EPSS score
0.53%
0%100%
Low · +0.19 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 20-03-2026PublishedVulnerability first disclosed.
- 23-03-2026Last modifiedVulnerability information updated.
Description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a malformed H.265 PPS NAL unit causes a segmentation fault in pic_parameter_set::set_derived_values(). This issue has been patched in version 1.0.17.
CVSS metrics
7 scores · 5 sources · 2 versionsHigh 8.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- NVDNIST8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
High 7.5Preferred score · OSV · Alpine (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
+0.19 pp
From 0.35% on 20-09-2026
20-09-202620-10-2026
EPSS score0.53%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundLibde265
Maturity: poc
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-476NULL Pointer DereferenceThe product dereferences a pointer that it expects to be valid but is NULL.
Affected systems
Alpine1 product
- libde265< 1.0.18-r0
Debian1 product
- libde265< 1.0.11-1+deb12u3 | < 1.0.15-1+deb13u2 | < 1.0.18-1
Struktur1 product
- libde265< 1.0.17
Strukturag1 product
- libde265< 1.0.17
Ubuntu1 product
- libde265< 1.0.2-2ubuntu0.16.04.1~esm6 | < 1.0.2-2ubuntu0.18.04.1~esm6 | < 1.0.4-1ubuntu0.4+esm2 | < 1.0.8-1ubuntu0.3+esm2 | < 1.0.15-1ubuntu0.1 | All versions (No fix recorded) | < 1.0.16-1ubuntu0.1~esm1
5 vendors · 5 products
References
7 links- github.com/strukturag/libde265/security/advisories/GHSA-wqrf-6rf5-v78rX Refsource CONFIRMREPORTExploitVendor Advisory
