CRITICAL: CVE-2026-31501 (CVSS 9.8) — multiple products

CVE: CVE-2026-31501

CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

_See vendor advisory_

Summary

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.

Verified Sources

References

https://git.kernel.org/stable/c/d5827316debcb677679bb014885d7be92c410e11
https://git.kernel.org/stable/c/eb8c426c9803beb171f89d15fea17505eb517714

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._

Lyrie Verdict

A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.

#critical