Vigie VulnDBEuropean-hosted Vulnerability DB
EN
Menu

scsi: core: Wake up the error handler when final completions race against each other (Linux Linux)

CVE-2026-23110
MEDIUM 4.7

En bref

Source
NVD
EPSS
EPSS 0.11 % · centile 1 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Rechercher sur…

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Wake up the error handler when final completions race against each other The fragile ordering between marking commands completed or failed so that the error handler only wakes when the last running command completes or times out has race conditions. These race conditions can cause the SCSI layer to fail to wake the error handler, leaving I/O through the SCSI host stuck as the error state cannot advance. First, there is an memory ordering issue within scsi_dec_host_busy(). The write which clears SCMD_STATE_INFLIGHT may be reordered with reads counting in scsi_host_busy(). While the local CPU will see its own write, reordering can allow other CPUs in scsi_dec_host_busy() or scsi_eh_inc_host_failed() to see a raised busy count, causing no CPU to see a host busy equal to the host_failed count. This race condition can be prevented with a memory barrier on the error path to force the write to be visible before counting host busy commands. Second, there is a general ordering issue with scsi_eh_inc_host_failed(). By counting busy commands before incrementing host_failed, it can race with a final command in scsi_dec_host_busy(), such that scsi_dec_host_busy() does not see host_failed incremented but scsi_eh_inc_host_failed() counts busy commands before SCMD_STATE_INFLIGHT is cleared by scsi_dec_host_busy(), resulting in neither waking the error handler task. This needs the call to scsi_host_busy() to be moved after host_failed is incremented to close the race condition.

Faiblesses (CWE)

  • CWE-362 — Situation de compétition

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:L/AC:H/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 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < cc872e35c0df80062abc71268d690a2f749e542e ; affected 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 6d9a367be356101963c249ebf10ea10b32886607 ; affected 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 9fdc6f28d5e81350ab1d2cac8389062bd09e61e1 ; affected 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 64ae21b9c4f0c7e60cf47a53fa7ab68852079ef0 ; affected 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 219f009ebfd1ef3970888ee9eef4c8a06357f862 ; affected 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < fe2f8ad6f0999db3b318359a01ee0108c703a8c3
Linux · Linuxaffected 5.5 ; unaffected 0 < 5.5 ; unaffected 5.10.249 ≤ 5.10.* ; unaffected 6.1.162 ≤ 6.1.* ; unaffected 6.6.122 ≤ 6.6.* ; unaffected 6.12.68 ≤ 6.12.*

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