CVE-2026-26967
published 2026-02-20CVE-2026-26967: PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow…
PriorityP431medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.29%
21.1th percentile
PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| pjsip | pjproject | < f821c214e52b11bae11e4cd3c7f0864538fb5491 | f821c214e52b11bae11e4cd3c7f0864538fb5491 |
| pjsip | pjsip | < 2.17 | 2.17 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv4.08.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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
osv8.1HIGH
vendor_redhat8.1HIGH
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Red Hat
pjsip: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow
vendor_redhat·2026-02-20·CVSS 8.1
CVE-2026-26967 [HIGH] CWE-120 pjsip: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow
pjsip: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow
PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.
A flaw was found in PJSIP. A remote attacker could exploit a heap-based buffer overflow vulnerability in the H.264 unpacketizer by sending specia
OSV
CVE-2026-26967: PJSIP is a free and open source multimedia communication library written in C
osv·2026-02-20·CVSS 8.1
CVE-2026-26967 [HIGH] CVE-2026-26967: PJSIP is a free and open source multimedia communication library written in C
PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-26967 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.1
CVE-2026-26967 [HIGH] CVE-2026-26967 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-26967 :
NixOS vulnerability analysis and mitigation
PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491 .
Source : NVD
## 8.1
Score
Published February 20, 2026
Severity HIGH
CNA Score 8.1
Affected Technologies
NixOS
Linux Ubuntu
Has Public Exploit No
Has CISA KE
Bugzilla
CVE-2026-26967 pjproject: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow [fedora-all]
bugzilla·2026-02-20·CVSS 5.3
CVE-2026-26967 [MEDIUM] CVE-2026-26967 pjproject: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow [fedora-all]
CVE-2026-26967 pjproject: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
2026-02-20
Published