CVE-2026-52954

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-52954

Key Details

CVE	CVE-2026-52954
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-617 (Reachable Assertion)

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:

libceph: handle rbtree insertion error in decode_choose_args()

A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself

contains a CRUSH map. The received CRUSH map may optionally contain

choose_args that get decoded in decode_choose_args(). In this function,

num_choose_arg_maps is read from the message, and a corresponding number

of crush_choose_arg_maps gets decoded afterwards. Each

crush_choose_arg_map has a choose_args_index, which serves as the key

when inserting it into the choose_args rbtree of the decoded crush_map.

If a (potentially corrupted) message contains two crush_choose_arg_maps

with the same index, the assertion in insert_choose_arg_map() triggers a

kernel BUG when trying to insert the second crush_choose_arg_map.

This patch fixes the issue by switching to the non-asserting rbtree

insertion function and rejecting the message if the insertion fails.

[ idryomov: changelog ] (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-52954
CVE	https://www.cve.org/CVERecord?id=CVE-2026-52954

Source

Reference

NVD

CVE