CVE-2026-0799
Publication date 5 September 2026
Last updated 25 September 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libpcap | 26.04 LTS resolute |
Fixed 1.10.6-1ubuntu1.1
|
| 24.04 LTS noble |
Fixed 1.10.4-4.1ubuntu3.1
|
|
| 22.04 LTS jammy |
Fixed 1.10.1-4ubuntu1.22.04.2
|
|
| 20.04 LTS focal |
Fixed 1.9.1-3ubuntu1.20.04.1+esm1
|
|
| 18.04 LTS bionic |
Fixed 1.8.1-6ubuntu1.18.04.2+esm1
|
|
| 16.04 LTS xenial |
Fixed 1.7.4-2ubuntu0.1+esm1
|
|
| 14.04 LTS trusty |
Fixed 1.5.3-2ubuntu0.1+esm1
|
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CVSS version: CVSS v3.0
Base score
8.7 · High
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8824-1
- libpcap vulnerability
- 25 September 2026