scsi: sg: Allow waiting for commands to complete on removed device (Linux Linux)

CVE-2022-50215
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.25 % · centile 17 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Allow waiting for commands to complete on removed device When a SCSI device is removed while in active use, currently sg will immediately return -ENODEV on any attempt to wait for active commands that were sent before the removal. This is problematic for commands that use SG_FLAG_DIRECT_IO since the data buffer may still be in use by the kernel when userspace frees or reuses it after getting ENODEV, leading to corrupted userspace memory (in the case of READ-type commands) or corrupted data being sent to the device (in the case of WRITE-type commands). This has been seen in practice when logging out of a iscsi_tcp session, where the iSCSI driver may still be processing commands after the device has been marked for removal. Change the policy to allow userspace to wait for active sg commands even when the device is being removed. Return -ENODEV only when there are no more responses to read.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
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 c6517b7942fad663cc1cf3235cbe4207cf769332 < bbc118acf7baf9e93c5e1314d14f481301af4d0f ; affected c6517b7942fad663cc1cf3235cbe4207cf769332 < f5e61d9b4a699dd16f32d5f39eb1cf98d84c92ed ; affected c6517b7942fad663cc1cf3235cbe4207cf769332 < ed9afd967cbfe7da2dc0d5e52c62a778dfe9f16b ; affected c6517b7942fad663cc1cf3235cbe4207cf769332 < f135c65085eed869d10e4e7923ce1015288618da ; affected c6517b7942fad663cc1cf3235cbe4207cf769332 < 408bfa1489a3cfe7150b81ab0b0df99b23dd5411 ; affected c6517b7942fad663cc1cf3235cbe4207cf769332 < 8c004b7dbb340c1e5889f5fb9e5baa6f6e5303e8
Linux · Linuxaffected 2.6.30 ; unaffected 0 < 2.6.30 ; unaffected 4.9.326 ≤ 4.9.* ; unaffected 4.14.291 ≤ 4.14.* ; unaffected 4.19.256 ≤ 4.19.* ; unaffected 5.4.211 ≤ 5.4.*

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