CVE-2026-77396— PJSIP: Heap buffer overflow in the AVI parser
Quick assessment
Affected
pjsip pjproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the PJSIP AVI parser in pjmedia/src/pjmedia/avi_player.c uses an input-file video chunk length as the number of bytes copied into a frame buffer whose capacity
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I. Basic Information for CVE-2026-77396
Vulnerability Information
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Vulnerability Title
PJSIP: Heap buffer overflow in the AVI parser
Source: CVE Program / CVE List V5
Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the PJSIP AVI parser in pjmedia/src/pjmedia/avi_player.c uses an input-file video chunk length as the number of bytes copied into a frame buffer whose capacity is derived from the declared media dimensions. A crafted AVI file can therefore cause an attacker-controlled out-of-bounds write past the heap allocation when an application plays the file or pulls its frames. The existing size assertion does not protect production release builds, where assertions are disabled. Typical local playback can crash the process, while applications that accept untrusted AVI sources expose a stronger memory-corruption condition. No fixed version is available as of this review.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-77396
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Patches & Fixes for CVE-2026-77396 (1)
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Merge commit from fork · pjsip/pjproject@7ecc658 · GitHub x_refsource_MISC
Other References for CVE-2026-77396 (1)
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Heap buffer overflow in the AVI parser · Advisory · pjsip/pjproject · GitHub x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: pjproject
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CVE-2026-84975
PJSIP: TLS server identity (hostname) verification bypass vi -
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PJSIP: Pre-authentication overflow in the telnet CLI history -
CVE-2026-57164
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CVE-2026-57163
PJSIP: Stack overflow parsing a TLS peer certificate's Subje
Same vendor: pjsip
-
CVE-2026-84975
PJSIP: TLS server identity (hostname) verification bypass vi -
CVE-2026-57166
PJSIP: Pre-authentication overflow in the telnet CLI error -
CVE-2026-57165
PJSIP: Pre-authentication overflow in the telnet CLI history -
CVE-2026-57164
PJSIP: Heap overflow in the HTTP client -
CVE-2026-57163
PJSIP: Stack overflow parsing a TLS peer certificate's Subje
Same weakness: CWE-122
-
CVE-2026-11727
IBM MQ for HPE NonStop is vulnerable to a denial of service -
CVE-2026-11716
IBM MQ for HPE NonStop is vulnerable to a denial of service -
CVE-2026-75893
Heap based buffer overflow at ipaccess_proxy_read_msg() -
CVE-2026-55556
Rsyslog: Heap buffer overflow in imhttp plugin Basic Authent -
CVE-2026-46655
virtio-win: Integer overflow causing a heap overflow in Vios
V. Comments for CVE-2026-77396
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