An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function. The patch added a size validation check lsize + 8 > size, but it does not account for the GST_ROUND_UP_2(lsize) used in the actual offset calculation. When lsize is an odd number, the parser advances more bytes than validated, causing OOB read.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://access.redhat.com/security/cve/CVE-2026-1940
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2436932
secalert@redhat.com
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4854
secalert@redhat.com
https://gstreamer.freedesktop.org/security/sa-2026-0001.html
secalert@redhat.com
https://security-tracker.debian.org/tracker/CVE-2026-1940
secalert@redhat.com