01 Record

CVE-2026-43253

iommu/amd: move wait_on_sem() out of spinlock

HighPUBLISHEDCNA: Linux

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

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02 Description

iommu/amd: move wait_on_sem() out of spinlock

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited 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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 27.2% 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Low. 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

2026-05-06 11:28Z5 MO AGO

Last updated

2026-10-19 19:16Z9 DAYS AGO

Reserved

2026-05-01

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-833DeadlockBase
CWE-667Improper LockingClass
CWE-413Improper Resource LockingBase

Data version

5.2

Document digest

5c670b8dd0e92908a8dd9f3c9a90c4993998f61cc5163e2a0701992bf3cedadf

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4bf5beef578e46393f11eb69dda7d17a065e05ff to < f2f65b28d802a667119147444ec2ae33eebf9a58, 4bf5beef578e46393f11eb69dda7d17a065e05ff to < 715c263119fd1b918a9fcbd8a36ea5b604a46324, 4bf5beef578e46393f11eb69dda7d17a065e05ff to < e15768e68820142077bbca402d8e902f64ade1b0, 4bf5beef578e46393f11eb69dda7d17a065e05ff to < 496269d12072ecb219826485bdbec70c92a8eef5, 4bf5beef578e46393f11eb69dda7d17a065e05ff to < d2a0cac10597068567d336e85fa3cbdbe8ca62bf, 4.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f2f65b28d802a667119147444ec2ae33eebf9a58
git.kernel.orghttps://git.kernel.org/stable/c/715c263119fd1b918a9fcbd8a36ea5b604a46324
git.kernel.orghttps://git.kernel.org/stable/c/e15768e68820142077bbca402d8e902f64ade1b0
git.kernel.orghttps://git.kernel.org/stable/c/496269d12072ecb219826485bdbec70c92a8eef5
git.kernel.orghttps://git.kernel.org/stable/c/d2a0cac10597068567d336e85fa3cbdbe8ca62bf

07 Fixed in

Debian 12

linux
No fix yet

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

Debian 13

linux
Fixed in 6.12.85-1

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

Debian 14

linux
Fixed in 6.19.6-1

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