01 Record

CVE-2026-45944

iommu/vt-d: Clear Present bit before tearing down context entry

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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02 Description

iommu/vt-d: Clear Present bit before tearing down context entry

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.1% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-21.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-27 12:18Z5 MO AGO

Last updated

2026-10-21 12:41Z8 DAYS AGO

Reserved

2026-05-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.2

Document digest

fe2432bbb6b6278954d27c1e8f1f221a1f188836f2a80b61443090ad990555db

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxba39592764ed20cee09aae5352e603a27bf56b0d to < ab4aeab2d630e68be60ccbea3fcf76fa7c281a18, ba39592764ed20cee09aae5352e603a27bf56b0d to < c716a59e9977d751e5eb54bcfa6a80124cb5067b, ba39592764ed20cee09aae5352e603a27bf56b0d to < d2138abc8f0a7fce4101b7229b43b06811ed083d, ba39592764ed20cee09aae5352e603a27bf56b0d to < a922dbafb4a674d958d702038232d09a30daf770, ba39592764ed20cee09aae5352e603a27bf56b0d to < c1e4f1dccbe9d7656d1c6872ebeadb5992d0aaa2, 2.6.24—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ab4aeab2d630e68be60ccbea3fcf76fa7c281a18
git.kernel.orghttps://git.kernel.org/stable/c/c716a59e9977d751e5eb54bcfa6a80124cb5067b
git.kernel.orghttps://git.kernel.org/stable/c/d2138abc8f0a7fce4101b7229b43b06811ed083d
git.kernel.orghttps://git.kernel.org/stable/c/a922dbafb4a674d958d702038232d09a30daf770
git.kernel.orghttps://git.kernel.org/stable/c/c1e4f1dccbe9d7656d1c6872ebeadb5992d0aaa2

07 Fixed in

Debian 12

linux
No fix yet
linux-6.12
Fixed in 6.12.100-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.100-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.18.14-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.