abort() in libpcap before 1.10.7 on an invalid BPF opcode
Summary
| CVE | CVE-2026-31911 |
|---|---|
| State | PUBLISHED |
| Assigner | Tcpdump |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-05 19:16:55 UTC |
| Updated | 2026-09-05 19:16:55 UTC |
| Description | libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode. In particular uncommon use cases a crafted filter program can terminate the OS process. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-617 | CWE-617 CWE-617 Reachable Assertion
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | The Tcpdump Group | Libpcap | affected 1.10.7 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/the-tcpdump-group/libpcap/commit/a715bcdde830299cba4171514385... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: FuzzAnything Organization (en)
Additional Advisory Data
Solutions
CNA: Upgrade to libpcap 1.10.7.
Exploits
CNA: A functional exploit exists.
There are currently no legacy QID mappings associated with this CVE.