High [CVE-2026-0799] Out-of-bounds read and write vulnerability allows arbitrary memory access
This high-severity Red Hat Linux advisory covers CVE-2026-0799 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
A flaw was found in libpcap. The Berkeley Packet Filter (BPF) interpreter in libpcap does not properly validate register indexes in BPF instructions.
A local attacker could craft a malicious filter program to trigger an out-of-bounds read and write vulnerability. This could allow the attacker to read and write arbitrary operating system process memory, potentially leading to information disclosure or arbitrary code execution.
Red Hat severity: Important — CVSS 8.7 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H). Weakness: CWE-125.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: libpcap.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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