CVE-2025-40058
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Disallow dirty tracking if incoherent page walk Dirty page tracking relies on the IOMMU atomically updating the dirty bit in the paging-structure entry. For this operation to succeed, the paging- structure memory must be coherent between the IOMMU and the CPU. In another word, if the iommu page walk is incoherent, dirty page tracking doesn't work. The Intel VT-d specification, Section 3.10 "Snoop Behavior" states: "Remapping hardware encountering the need to atomically update A/EA/D bits in a paging-structure entry that is not snooped will result in a non- recoverable fault." To prevent an IOMMU from being incorrectly configured for dirty page tracking when it is operating in an incoherent mode, mark SSADS as supported only when both ecap_slads and ecap_smpwc are supported.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| rocky | 9 | fixed | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.17.6-1 |
| debian | sid | fixed | 6.17.6-1 |
| debian | trixie | fixed | 6.12.57-1 |
| almalinux | 9 | fixed | kernel-64k-debug-devel-5.14.0-611.11.1.el9_7.aarch64.rpm |
References
- https://access.redhat.com/errata/RHSA-2025:22405
- https://www.suse.com/security/cve/CVE-2025-40058.html
- https://errata.rockylinux.org/RLSA-2025:22405
- https://security-tracker.debian.org/tracker/CVE-2025-40058
- https://bugzilla.redhat.com/2393172
- https://bugzilla.redhat.com/2396934
- https://bugzilla.redhat.com/2400598
- https://bugzilla.redhat.com/2400628
- https://bugzilla.redhat.com/2402699
- https://bugzilla.redhat.com/2404105
- https://bugzilla.redhat.com/2406776
- https://bugzilla.redhat.com/2414741
- https://errata.almalinux.org/9/ALSA-2025-22405.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.