btrfs: fix abort logic in btrfs_replace_file_extents (Linux Linux)

CVE-2021-47433
HIGH 8.1

En bref

Source
NVD
EPSS
EPSS 0.58 % · centile 48 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix abort logic in btrfs_replace_file_extents Error injection testing uncovered a case where we'd end up with a corrupt file system with a missing extent in the middle of a file. This occurs because the if statement to decide if we should abort is wrong. The only way we would abort in this case is if we got a ret != -EOPNOTSUPP and we called from the file clone code. However the prealloc code uses this path too. Instead we need to abort if there is an error, and the only error we _don't_ abort on is -EOPNOTSUPP and only if we came from the clone file code.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HLinux
CVSS 3.1HIGH 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 8fccebfa534c7984864394fa03608305e4929aae < 0e32a2b85c7d92ece86c17dfef390c5ed79c6378 ; affected 8fccebfa534c7984864394fa03608305e4929aae < 0e309e1152fc34ef75991d9d69b165dbf75bf26c ; affected 8fccebfa534c7984864394fa03608305e4929aae < 4afb912f439c4bc4e6a4f3e7547f2e69e354108f
Linux · Linuxaffected 5.10 ; unaffected 0 < 5.10 ; unaffected 5.10.75 ≤ 5.10.* ; unaffected 5.14.14 ≤ 5.14.* ; unaffected 5.15 ≤ *

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