CVE-2026-68143

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68143

Key Details

CVE	CVE-2026-68143
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
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:

net: slip: serialize receive against buffer reallocation

sl_realloc_bufs() replaces rbuff and updates buffsize while holding

sl->lock. slip_receive_buf() reads those fields and writes through rbuff

without holding the lock.

An MTU change can therefore race with receive processing. An MTU shrink

can expose the new smaller rbuff with the old larger bound, causing an

out-of-bounds write. A receive callback which already loaded the old

rbuff can instead continue writing after that buffer has been freed.

Serialize receive processing with sl_realloc_bufs() by holding sl->lock

while consuming each receive batch. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68143
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68143

Source

Reference

NVD

CVE