Use After Free in Ffmpeg
CVE-2022-48434
libavcodec/pthread_frame.c in FFmpeg before 5.1.2, as used in VLC and other products, leaves stale hwaccel state in worker threads, which allows attackers to trigger a use-after-free and execute arbitrary code in some circumstances (e.g., hardware re-initialization upon a mid-video SPS change when Direct3D11 is used).
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.ffmpeg.org/gitweb/ffmpeg.git/commit/cc867f2c09d2b69cee8a0eccd62aff002cbbfe11 (Patch, Mailing List)
- news.ycombinator.com/item (Exploit, Third Party Advisory, Issue Tracking)
- wrv.github.io/h26forge.pdf (Technical Description)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202312-14 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-48434?
- CVE-2022-48434 is a high-severity vulnerability in Ffmpeg, classified under Use After Free. CVSS score: 8.1/10. Published 2023-03-29.
- How severe is CVE-2022-48434?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2022-48434 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.