SB2026090406 - Multiple vulnerabilities in libde265

Description

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free (CVE-ID: N/A)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose information or execute arbitrary code.

The vulnerability exists due to use-after-free in decoder_context::reset() when processing a dependent H.265 slice after a decoder reset. A remote attacker can trick the victim into processing a crafted H.265 stream to disclose information or execute arbitrary code.

User interaction is required.

2) Race condition (CVE-ID: N/A)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper synchronization in the threaded WPP decode path when decoding a crafted H.265/HEVC bitstream. A remote attacker can submit a crafted H.265/HEVC bitstream to cause a denial of service.

Exploitation is scheduling-dependent and requires libde265 worker threads to be enabled.

Remediation

Install update from vendor's website.

References

• https://github.com/strukturag/libde265/security/advisories/GHSA-mm7m-v26f-wf8x
• https://github.com/strukturag/libde265/security/advisories/GHSA-xp3h-6f5r-8cxp