- 8.7HighCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 99% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.
Timeline
ID reserved
By Tcpdump
- 8 months later
· 8 months later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| TcpdumpCNA (assigner) | 3.1 | High8.7 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High8.7 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 99% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- affected < 1.10.7
What to do
Solution: Upgrade to libpcap 1.10.7.
Workaround: Validate every filter program that has not been produced by a local call to pcap_compile().
Exploitation: A functional exploit exists.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-72015 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-0799)Record last updated .