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TI-2025-26730 Aliases CVE-2025-40058GHSA-hwfw-95mf-c924

iommu/vt-d: Disallow dirty tracking if incoherent page walk

Priority LOW 37Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 10 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.00163 5th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.12.53, 6.17.3, 6.18Red Hat: 2 advisoriesRed Hat: 10 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.7 and later6.12.53, 6.17.3, 6.18Patch availableCNA
  • Linux VendorLinux Affected 6.7 and later Fixed in 6.12.53, 6.17.3, 6.18 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.12.53, 6.17.3, 6.18

Red Hat 2 advisories

  • RHSA-2025:22854 Released 2025-12-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.20.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.20.1.el10_1, kernel-64k-devel-6.12.0-124.20.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.20.1.el10_1, kernel-64k-6.12.0-124.20.1.el10_1, kernel-64k-core-6.12.0-124.20.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.20.1.el10_1, libperf-6.12.0-124.20.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.20.1.el10_1, kernel-rt-64k-6.12.0-124.20.1.el10_1, kernel-rt-64k-core-6.12.0-124.20.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.20.1.el10_1, kernel-rt-core-6.12.0-124.20.1.el10_1, kernel-rt-debug-6.12.0-124.20.1.el10_1 +9
  • RHSA-2025:22405 Released 2025-12-01 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.11.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.11.1.el9_7, kernel-64k-devel-5.14.0-611.11.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.11.1.el9_7, kernel-64k-5.14.0-611.11.1.el9_7, kernel-64k-core-5.14.0-611.11.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.11.1.el9_7, libperf-5.14.0-611.11.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.11.1.el9_7, kernel-rt-64k-5.14.0-611.11.1.el9_7, kernel-rt-64k-core-5.14.0-611.11.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.11.1.el9_7, kernel-rt-core-5.14.0-611.11.1.el9_7, kernel-rt-debug-5.14.0-611.11.1.el9_7 +9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:22405
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:22405
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:22405
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:22405
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:22405
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40058
  2. 2026-10-03 Alias added: GHSA-hwfw-95mf-c924

References

Other 3

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences