CVE-2026-31912

OOBR in libpcap before 1.10.7

CVE-2026-31912 is fixed in 4 products on 1 platform, first by FEDORA-2026-4401B94AD0, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0011
1st percentile

libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer 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-2026-31912 Sep 14, 2026
libpcap · Fedora 43 14:1.10.7-1.fc43 FEDORA-2026-4401B94AD0 Sep 10, 2026
libpcap · amzn 2023 14:1.10.7-1.amzn2023.0.1 ALAS2023-2026-3100 Sep 28, 2026
libpcap · opensuse-leap 16.0 1.10.5-160000.5.1 OPENSUSE-SU-2026:21940-1 Sep 23, 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 · amzn 2023 14:1.10.7-1.amzn2023.0.1 ALAS2023-2026-3100 Sep 28, 2026

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