vfio/platform: Create persistent IRQ handlers (Linux Linux)

CVE-2024-26813
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.23 % · centile 14 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: vfio/platform: Create persistent IRQ handlers The vfio-platform SET_IRQS ioctl currently allows loopback triggering of an interrupt before a signaling eventfd has been configured by the user, which thereby allows a NULL pointer dereference. Rather than register the IRQ relative to a valid trigger, register all IRQs in a disabled state in the device open path. This allows mask operations on the IRQ to nest within the overall enable state governed by a valid eventfd signal. This decouples @masked, protected by the @locked spinlock from @trigger, protected via the @igate mutex. In doing so, it's guaranteed that changes to @trigger cannot race the IRQ handlers because the IRQ handler is synchronously disabled before modifying the trigger, and loopback triggering of the IRQ via ioctl is safe due to serialization with trigger changes via igate. For compatibility, request_irq() failures are maintained to be local to the SET_IRQS ioctl rather than a fatal error in the open device path. This allows, for example, a userspace driver with polling mode support to continue to work regardless of moving the request_irq() call site. This necessarily blocks all SET_IRQS access to the failed index.

Faiblesses (CWE)

  • CWE-476 — Déréférencement de pointeur nul

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 57f972e2b341dd6a73533f9293ec55d584a5d833 < 07afdfd8a68f9eea8db0ddc4626c874f29d2ac5e ; affected 57f972e2b341dd6a73533f9293ec55d584a5d833 < 09452c8fcbd7817c06e8e3212d99b45917e603a5 ; affected 57f972e2b341dd6a73533f9293ec55d584a5d833 < cc5838f19d39a5fef04c468199699d2a4578be3a ; affected 57f972e2b341dd6a73533f9293ec55d584a5d833 < 7932db06c82c5b2f42a4d1a849d97dba9ce4a362 ; affected 57f972e2b341dd6a73533f9293ec55d584a5d833 < 62d4e43a569b67929eb3319780be5359694c8086 ; affected 57f972e2b341dd6a73533f9293ec55d584a5d833 < d6bedd6acc0bcb1e7e010bc046032e47f08d379f
Linux · Linuxaffected 4.1 ; unaffected 0 < 4.1 ; unaffected 5.4.274 ≤ 5.4.* ; unaffected 5.10.215 ≤ 5.10.* ; unaffected 5.15.154 ≤ 5.15.* ; unaffected 6.1.84 ≤ 6.1.*

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