CVE-2026-99270

Last refreshed2026-11-03

Status: UPDATED | Advisory ID: CVE-2026-99270

Key Details

CVE	CVE-2026-99270
CVSS Score / Version	8.1 (High) / CVSS v3.1
Updated	2026-11-03
CVSS Vector	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is high; 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:

tcp: Fix potential UAF in reqsk_timer_handler().

When TCP socket migration fails at inet_ehash_insert() in

reqsk_timer_handler(), we jump to the no_ownership: label

and free the new reqsk immediately with __reqsk_free().

Thus, we must stop the new reqsk's timer before jumping to the

label, but the timer might be missed since the cited commit,

resulting in UAF.

As we are in the original reqsk's timer context, we can safely

call timer_delete_sync() for the new reqsk.

Let's pass false to __inet_csk_reqsk_queue_drop() to stop

the new reqsk's timer. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-99270
CVE	https://www.cve.org/CVERecord?id=CVE-2026-99270

Source

Reference

NVD

CVE