CVE-2026-68158

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68158

Key Details

CVE	CVE-2026-68158
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
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:

libceph: Fix multiplication overflow in decode_new_up_state_weight()

If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted

osdmap, out-of-bounds memory accesses may occur in

decode_new_up_state_weight(). This happens because the bounds check for

the new_state part is based on calculating its length depending on a len

value read from the incoming message. This calculation may overflow

leading to an incorrect bounds check. Subsequently, out-of-bounds reads

may occur when decoding this part.

This patch switches the multiplication to use check_mul_overflow() to

abort processing the osdmap if an overflow occurred. Therefore,

osdmaps/messages containing large values for len that result in a

multiplication overflow are treated as invalid.

[ idryomov: rename new_state_len -> new_state_item_size, formatting ] (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68158
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68158

Source

Reference

NVD

CVE