OOBR and OOBW in libpcap before 1.10.7
CVE-2026-0799 is fixed in 6 products on 1 platform, first by libpcap0.8t64 1.10.6-1ubuntu1.1, released September 5, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libpcap · Debian 14 | 1.10.7-1 | DEBIAN-CVE-2026-0799 | Sep 14, 2026 |
| libpcap · Fedora 43 | 14:1.10.7-1.fc43 | FEDORA-2026-4401B94AD0 | Sep 10, 2026 |
| libpcap · RHEL 10 | 1.10.4-7.el10_2.1 | RHSA-2026:74442 | Oct 2, 2026 |
| libpcap · RHEL 8 | 14:1.9.1-6.el8_10 | RHSA-2026:76045 | Oct 5, 2026 |
| libpcap · RHEL 9 | 14:1.10.0-4.el9_8.1 | RHSA-2026:74441 | Oct 2, 2026 |
| libpcap · almalinux 10 | 14:1.10.4-7.el10_2.1 | ALSA-2026:74442 | Oct 1, 2026 |
| libpcap · almalinux 8 | 14:1.9.1-6.el8_10 | ALSA-2026:76045 | Oct 5, 2026 |
| libpcap · almalinux 9 | 14:1.10.0-4.el9_8.1 | ALSA-2026:74441 | Oct 1, 2026 |
| libpcap · amzn 2023 | 14:1.10.7-1.amzn2023.0.1 | ALAS2023-2026-3100 | Sep 28, 2026 |
| libpcap · ol 10 | 14:1.10.4-7.el10_2.1 | ELSA-2026-74442 | Oct 1, 2026 |
| libpcap · ol 8 | 14:1.9.1-6.el8_10 | ELSA-2026-76045 | Oct 5, 2026 |
| libpcap · ol 9 | 14:1.10.0-4.el9_8.1 | ELSA-2026-74441 | Oct 1, 2026 |
| libpcap · opensuse-leap 16.0 | 1.10.5-160000.5.1 | OPENSUSE-SU-2026:21940-1 | Sep 23, 2026 |
| libpcap · rocky 10 | 4:1.10.4-7.el10_2.1 | RLSA-2026:74442 | Oct 2, 2026 |
| libpcap · rocky 8 | 4:1.9.1-6.el8_10 | RLSA-2026:76045 | Oct 7, 2026 |
| libpcap · rocky 9 | 4:1.10.0-4.el9_8.1 | RLSA-2026:74441 | Oct 2, 2026 |
| libpcap · sles 15.6 | 1.10.4-150600.3.12.1 | SUSE-SU-2026:4194-1 | Sep 15, 2026 |
| libpcap · sles 15.7 | 1.10.5-150700.3.13.1 | SUSE-SU-2026:4188-1 | Sep 15, 2026 |
| libpcap · sles 16.0 | 1.10.5-160000.5.1 | SUSE-SU-2026:23907-1 | Sep 23, 2026 |
| libpcap-debuginfo · Fedora 43 | 14:1.10.7-1.fc43 | FEDORA-2026-4401B94AD0 | Sep 10, 2026 |
| libpcap-debuginfo · amzn 2023 | 14:1.10.7-1.amzn2023.0.1 | ALAS2023-2026-3100 | Sep 28, 2026 |
| libpcap-debugsource · Fedora 43 | 14:1.10.7-1.fc43 | FEDORA-2026-4401B94AD0 | Sep 10, 2026 |
| libpcap-debugsource · amzn 2023 | 14:1.10.7-1.amzn2023.0.1 | ALAS2023-2026-3100 | Sep 28, 2026 |
| libpcap-devel · Fedora 43 | 14:1.10.7-1.fc43 | FEDORA-2026-4401B94AD0 | Sep 10, 2026 |
| libpcap-devel · RHEL 8 | 14:1.9.1-6.el8_10 | RHSA-2026:76045 | Oct 5, 2026 |
| libpcap-devel · RHEL 9 | 14:1.10.0-4.el9_8.1 | RHSA-2026:74441 | Oct 2, 2026 |
| libpcap-devel · almalinux 10 | 14:1.10.4-7.el10_2.1 | ALSA-2026:74442 | Oct 1, 2026 |
| libpcap-devel · almalinux 8 | 14:1.9.1-6.el8_10 | ALSA-2026:76045 | Oct 5, 2026 |
| libpcap-devel · almalinux 9 | 14:1.10.0-4.el9_8.1 | ALSA-2026:74441 | Oct 1, 2026 |
| libpcap-devel · amzn 2023 | 14:1.10.7-1.amzn2023.0.1 | ALAS2023-2026-3100 | Sep 28, 2026 |
| libpcap-devel · ol 10 | 14:1.10.4-7.el10_2.1 | ELSA-2026-74442 | Oct 1, 2026 |
| libpcap-devel · ol 8 | 14:1.9.1-6.el8_10 | ELSA-2026-76045 | Oct 5, 2026 |
| libpcap-devel · ol 9 | 14:1.10.0-4.el9_8.1 | ELSA-2026-74441 | Oct 1, 2026 |
| libpcap0.8 · Ubuntu 18.04.6 LTS (bionic) | 1.8.1-6ubuntu1.18.04.2+esm1 | libpcap0.8 1.8.1-6ubuntu1.18.04.2+esm1 | Sep 28, 2026 |
| libpcap0.8 · Ubuntu 20.04 LTS (focal) | 1.9.1-3ubuntu1.20.04.1+esm1 | libpcap0.8 1.9.1-3ubuntu1.20.04.1+esm1 | Sep 28, 2026 |
| libpcap0.8 · Ubuntu 22.04.1 LTS (jammy) | 1.10.1-4ubuntu1.22.04.2 | libpcap0.8 1.10.1-4ubuntu1.22.04.2 | Sep 28, 2026 |
| libpcap0.8t64 · Ubuntu 24.04.5 LTS (noble) | 1.10.4-4.1ubuntu3.1 | libpcap0.8t64 1.10.4-4.1ubuntu3.1 | Sep 28, 2026 |
| libpcap0.8t64 · Ubuntu 26.04.1 LTS (resolute) | 1.10.6-1ubuntu1.1 | libpcap0.8t64 1.10.6-1ubuntu1.1 | Sep 5, 2026 |
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