Unauthenticated Remote Use-After-Free in Linux Linux Kernel Rates 9.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-31501

Key Details

CVE	CVE-2026-31501
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-15
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
Classified as	CWE-416 (Use After Free)
Exploitation prediction (EPSS)	0.38% probability of exploitation in the next 30 days (30% percentile) -- FIRST.org's EPSS model.

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: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path

cppi5_hdesc_get_psdata() returns a pointer into the CPPI descriptor.

In both emac_rx_packet() and emac_rx_packet_zc(), the descriptor is

freed via k3_cppi_desc_pool_free() before the psdata pointer is used

by emac_rx_timestamp(), which dereferences psdata[0] and psdata[1].

This constitutes a use-after-free on every received packet that goes

through the timestamp path.

Defer the descriptor free until after all accesses through the psdata

pointer are complete. For emac_rx_packet(), move the free into the

requeue label so both early-exit and success paths free the descriptor

after all accesses are done. For emac_rx_packet_zc(), move the free to

the end of the loop body after emac_dispatch_skb_zc() (which calls

emac_rx_timestamp()) has returned. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-31501
CVE	https://www.cve.org/CVERecord?id=CVE-2026-31501

Source

Reference

NVD

CVE