CVE-2026-74720

Name	CVE-2026-74720
Description	In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer state for commuted arithmetic When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields. Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.
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-4777-1, DLA-4788-1, DSA-6466-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bookworm	6.1.176-1	vulnerable
	bookworm (security)	6.1.187-1	fixed
	trixie	6.12.107-1	fixed
	trixie (security)	6.12.111-1	fixed
	forky, sid	7.2.8-1	fixed
linux-6.12 (PTS)	bookworm (security)	6.12.111-1~deb12u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	bookworm	6.1.187-1	DLA-4777-1
linux	source	trixie	6.12.105-1	DSA-6466-1
linux	source	(unstable)	7.1.9-1
linux-6.12	source	bookworm	6.12.107-1~deb12u1	DLA-4788-1

https://git.kernel.org/linus/a4c6f804b44c5c790269b25e0e61cf4e9f117c86 (7.2-rc7)