Giflib contains a double-free vulnerability that is the result of a shallow copy in GifMakeSavedImage and incorrect error handling. The conditions needed to trigger this vulnerability are difficult but may be possible.
References
- https://access.redhat.com/errata/RHSA-2026:16008
- https://access.redhat.com/errata/RHSA-2026:16009
- https://access.redhat.com/errata/RHSA-2026:16030
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:19154
- https://access.redhat.com/errata/RHSA-2026:19367
- https://access.redhat.com/errata/RHSA-2026:19724
- https://access.redhat.com/errata/RHSA-2026:19725
- https://access.redhat.com/errata/RHSA-2026:25096
- https://access.redhat.com/errata/RHSA-2026:8858
- https://access.redhat.com/errata/RHSA-2026:8859
- https://access.redhat.com/errata/RHSA-2026:8861
- https://access.redhat.com/errata/RHSA-2026:8883
- https://access.redhat.com/errata/RHSA-2026:8884
- https://access.redhat.com/errata/RHSA-2026:8885
- https://access.redhat.com/errata/RHSA-2026:8886
- https://access.redhat.com/errata/RHSA-2026:8887
- https://access.redhat.com/errata/RHSA-2026:9290
- https://access.redhat.com/errata/RHSA-2026:9291
- https://access.redhat.com/errata/RHSA-2026:9292
- https://access.redhat.com/errata/RHSA-2026:9294
- https://access.redhat.com/errata/RHSA-2026:9295
- https://access.redhat.com/security/cve/CVE-2026-23868
- https://bugzilla.redhat.com/show_bug.cgi?id=2446207
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23868.json
- https://sourceforge.net/p/giflib/code/ci/f5b7267aed3665ef025c13823e454170d031c106/tree/gifalloc.c?diff=5146815377b7395944cb683a08c43eee3f631eb7
- https://www.facebook.com/security/advisories/cve-2026-23868