libcss through 0.9.2 contains a NULL pointer dereference vulnerability in mq_parse_media_query() that allows remote attackers to crash consumers by supplying media lists ending in a comma. Attackers can serve a stylesheet whose @media or @import media list has a trailing comma, causing NetSurf or other parsers to crash.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 3
- StatusPublished → DeferredNVD modified 2026-10-27 16:04
- StatusReceived → PublishedNVD modified 2026-10-26 21:52
- First seenCVSS 7.1NVD modified 2026-10-26 22:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 5
- https://github.com/netsurf-browser/libcss
- https://github.com/netsurf-browser/libcss/blob/release/0.9.2/src/parse/mq.c#L984
- https://github.com/netsurf-browser/libcss/commit/006ffc4096040da13690abc380e5f828ec08284d
- https://hackmd.io/@haindpwn/libcss-media-list-null-deref
- https://www.vulncheck.com/advisories/libcss-through-0.9.2-null-pointer-dereference-via-media-query-parser