CVE-2026-0799

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.

High
CVSS
8.7
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0011
1st percentile

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

ProductFixed inFixReleased
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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