DOS / potential heap overwrite in mkv demuxing using bzip decompression. Integer overflow in matroskademux element in bzip decompression function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.
NVD Severity
Other trackers
Mailing lists
GitHub (code, issues), Aports (code, issues)


Type URI
Third Party Advisory
Mailing List

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:gstreamer_project:gstreamer:*:*:*:*:*:*:*:* gstreamer >= None < 1.20.3

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
gstreamer 3.15-main 1.18.5-r0 Natanael Copa <> possibly vulnerable
gstreamer 3.14-main 1.18.4-r0 Natanael Copa <> possibly vulnerable
gstreamer 3.13-main 1.18.4-r0 Natanael Copa <> possibly vulnerable