CVE-2026-31675

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-31675

Key Details

CVE	CVE-2026-31675
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
Classified as	CWE-125 (Out-of-bounds Read)

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/sched: sch_netem: fix out-of-bounds access in packet corruption

In netem_enqueue(), the packet corruption logic uses

get_random_u32_below(skb_headlen(skb)) to select an index for

modifying skb->data. When an AF_PACKET TX_RING sends fully non-linear

packets over an IPIP tunnel, skb_headlen(skb) evaluates to 0.

Passing 0 to get_random_u32_below() takes the variable-ceil slow path

which returns an unconstrained 32-bit random integer. Using this

unconstrained value as an offset into skb->data results in an

out-of-bounds memory access.

Fix this by verifying skb_headlen(skb) is non-zero before attempting

to corrupt the linear data area. Fully non-linear packets will silently

bypass the corruption logic. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-31675
CVE	https://www.cve.org/CVERecord?id=CVE-2026-31675

Source

Reference

NVD

CVE