Medium [CVE-2026-74561] avoid unlocked f6i_list walk in nh_rt_cache_flush
This medium-severity Red Hat Linux advisory covers CVE-2026-74561 affecting Red Hat Enterprise Linux 10, Red Hat package: kernel.
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Summary
A flaw was found in the Linux kernel, specifically within its nexthop component responsible for network routing. A timing issue, known as a race condition, allows the system to access memory after it has been freed.
This occurs when the kernel attempts to flush its routing cache while other operations are simultaneously modifying IPv6 routes. An attacker could potentially exploit this vulnerability to cause a system crash, leading to a denial of service, or in some cases, execute unauthorized code.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-825.
Affected Red Hat products: Red Hat Enterprise Linux 10. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel.
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 1 hour 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 1 hour 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 1 hour ago·verify at source
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