CVE-2026-90043

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90043

Key Details

CVE	CVE-2026-90043
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; 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:

zram: fix slot lock bit position on big-endian 64-bit

The slot lock is a bit operation on the whole __lock word, which flags and

ac_time alias as two u32s. On little-endian the lock bit lands in the

position ZRAM_ENTRY_LOCK reserves in flags, so the aliasing works out. On

64-bit big-endian it lands in ac_time instead: with

ZRAM_TRACK_ENTRY_ACTIME enabled, storing the access time from

mark_slot_accessed() or slot_free() wipes out the held lock bit, letting

another CPU take the same slot lock; an access time value with that bit

set makes the slot look locked forever.

Shift the lock bit into the flags half of the word on big-endian 64-bit. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90043
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90043

Source

Reference

NVD

CVE