libpcap crafted BPF filters can walk process memory
Crafted BPF filters can cause libpcap to walk process memory (rpcap / filter handling). Operators should upgrade to the fixed libpcap release cited by the vendor/NVD for their train.
Also tracked as CVE-2026-0799 · libpcap BPF rpcap
- First observed
- Sep 5, 2026
- Last observed
- Sep 5, 2026
- Last reviewed
- Sep 20, 2026
- Tracking ended
- Sep 5, 2026
Uncertainty and limitations
Read the evidence limits before acting on this record.
Exact fixed version must be confirmed against NVD/vendor for your libpcap package train.
- Pack lacked detailed fixed-version list; confirm against NVD/distro advisories.
- Impact depends on bpf/rpcap exposure in your capture stack.
- HOL blog is operator guidance, not a substitute for upstream advisories.
Timeline
Reviewed events, oldest first, each tied to a verified source.
- Disclosure
CVE-2026-0799 disclosed for libpcap BPF/rpcap memory walk.
- Update
HOL Guard published operator blog coverage for CVE-2026-0799.
Publication clock: 380.0 hours from reviewed disclosure timestamp to HOL publication; 12-hour critical target; historical backfill outside target.
Guard coverage and non-coverage
What Guard's reviewed coverage assertions do and do not claim for this campaign.
No Guard coverage mapping is published for this record.
Defensive policy guidance
Reviewed starting points for defending against this campaign's artifact classes.
No campaign-specific policy guidance is published.
Reviewed artifacts and indicators
Published values are defanged (for example hxxps and [.] blocks) so nothing here is copy-paste executable.
Reviewed artifacts
The specific artifacts this record concerns, as reviewed. Names and versions are shown as text; a registry link is not recorded here.
libpcapgenericpackage
Sources
Every claim on this record is traceable to the sources below.
Reviewed in full by HOL Guard Security Publishing.
- Published
- Last full review
- Last modified
Record HGTC-2026-26BFDFE4.