CVE-2026-23180

Name	CVE-2026-23180
Description	In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: add bounds check for if_id in IRQ handler The IRQ handler extracts if_id from the upper 16 bits of the hardware status register and uses it to index into ethsw->ports[] without validation. Since if_id can be any 16-bit value (0-65535) but the ports array is only allocated with sw_attr.num_ifs elements, this can lead to an out-of-bounds read potentially. Add a bounds check before accessing the array, consistent with the existing validation in dpaa2_switch_rx().
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4499-1, DSA-6141-1, DSA-6163-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.251-1	fixed
	bookworm	6.1.159-1	vulnerable
	bookworm (security)	6.1.164-1	fixed
	trixie	6.12.73-1	fixed
	trixie (security)	6.12.74-2	fixed
	forky, sid	6.19.8-1	fixed
linux-6.1 (PTS)	bullseye (security)	6.1.164-1~deb11u1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	(not affected)
linux	source	bookworm	6.1.164-1	DSA-6163-1
linux	source	trixie	6.12.73-1	DSA-6141-1
linux	source	(unstable)	6.18.10-1
linux-6.1	source	bullseye	6.1.164-1~deb11u1	DLA-4499-1

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/31a7a0bbeb006bac2d9c81a2874825025214b6d8 (6.19)