CVE-2026-74581

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-74581

Key Details

CVE	CVE-2026-74581
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-14
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

net: ipv6: clear suppressed fib6 rule result

fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),

but leaves res->rt6 pointing at the released rt6_info.

If no later rule supplies a replacement, fib6_rule_lookup() still sees

res.rt6 and returns that stale dst to its caller. A suppressing rule can

therefore leak a released route back to rt6_lookup(), and the next put

hits rcuref_put_slowpath() from dst_release().

Clear res->rt6 when suppressing the route so suppressed lookups fall

through to the null dst instead of reusing the released one. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74581
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74581

Source

Reference

NVD

CVE