CVE-2026-52981

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-52981

Key Details

CVE	CVE-2026-52981
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 none; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-401 (Missing Release of Memory after Effective Lifetime)

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:

neigh: let neigh_xmit take skb ownership

neigh_xmit always releases the skb, except when no neighbour table is

found. But even the first added user of neigh_xmit (mpls) relied on

neigh_xmit to release the skb (or queue it for tx).

sashiko reported:

If neigh_xmit() is called with an uninitialized neighbor table (for

example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT

and bypasses its internal out_kfree_skb error path. Because the return

value of neigh_xmit() is ignored here, does this leak the SKB?

Assume full ownership and remove the last code path that doesn't

xmit or free skb. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-52981
CVE	https://www.cve.org/CVERecord?id=CVE-2026-52981

Source

Reference

NVD

CVE