iommu/amd: move wait_on_sem() out of spinlock (Linux Linux)

CVE-2026-43253
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.34 % · centile 28 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: move wait_on_sem() out of spinlock With iommu.strict=1, the existing completion wait path can cause soft lockups under stressed environment, as wait_on_sem() busy-waits under the spinlock with interrupts disabled. Move the completion wait in iommu_completion_wait() out of the spinlock. wait_on_sem() only polls the hardware-updated cmd_sem and does not require iommu->lock, so holding the lock during the busy wait unnecessarily increases contention and extends the time with interrupts disabled.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 4bf5beef578e46393f11eb69dda7d17a065e05ff < 69d9339c02eddfc2a345be7220651068a3684383 ; affected 4bf5beef578e46393f11eb69dda7d17a065e05ff < f2f65b28d802a667119147444ec2ae33eebf9a58 ; affected 4bf5beef578e46393f11eb69dda7d17a065e05ff < 715c263119fd1b918a9fcbd8a36ea5b604a46324 ; affected 4bf5beef578e46393f11eb69dda7d17a065e05ff < e15768e68820142077bbca402d8e902f64ade1b0 ; affected 4bf5beef578e46393f11eb69dda7d17a065e05ff < 496269d12072ecb219826485bdbec70c92a8eef5 ; affected 4bf5beef578e46393f11eb69dda7d17a065e05ff < d2a0cac10597068567d336e85fa3cbdbe8ca62bf
Linux · Linuxaffected 4.9 ; unaffected 0 < 4.9 ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.* ; unaffected 6.12.75 ≤ 6.12.* ; unaffected 6.18.16 ≤ 6.18.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD