| Name | CVE-2025-54505 |
| Description | A transient execution vulnerability within AMD CPUs may allow a local user-privileged attacker to leak data via the floating point divisor unit, potentially resulting in loss of confidentiality. |
| 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-4818-1, DSA-6424-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xen (PTS) | bookworm | 4.17.5+72-g01140da4e8-1 | vulnerable |
| bookworm (security) | 4.17.7-0+deb12u1 | fixed |
| trixie | 4.20.3+127-gc42374a105-0+deb13u1 | fixed |
| trixie (security) | 4.20.4+39-gf1e1321c87-0+deb13u1 | fixed |
| forky | 4.20.3+127-gc42374a105-1 | fixed |
| sid | 4.20.4+39-gf1e1321c87-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xen | source | bullseye | (unfixed) | end-of-life | | |
| xen | source | bookworm | 4.17.7-0+deb12u1 | | DLA-4818-1 | |
| xen | source | trixie | 4.20.3+127-gc42374a105-0+deb13u1 | | DSA-6424-1 | |
| xen | source | (unstable) | 4.20.3+127-gc42374a105-1 | | | |
Notes
[bullseye] - xen <end-of-life> (not supported under bullseye)
AMD CPU HW issue:
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7053.html
https://roots.ec/blog/fpdss/
Mitigation in src:xen and src:linux:
https://xenbits.xen.org/xsa/advisory-488.html
https://git.kernel.org/linus/e55d98e7756135f32150b9b8f75d580d0d4b2dd3
The Linux kernel has its own CVE CVE-2026-31628 for the lack of mitigation, and
thus only tracked under CVE-2026-31628.