iomap: adjust read range correctly for non-block-aligned positions (Linux Linux)

CVE-2025-68794
CRITICAL 9.8

En bref

Source
NVD
EPSS
EPSS 0.69 % · centile 53 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: iomap: adjust read range correctly for non-block-aligned positions iomap_adjust_read_range() assumes that the position and length passed in are block-aligned. This is not always the case however, as shown in the syzbot generated case for erofs. This causes too many bytes to be skipped for uptodate blocks, which results in returning the incorrect position and length to read in. If all the blocks are uptodate, this underflows length and returns a position beyond the folio. Fix the calculation to also take into account the block offset when calculating how many bytes can be skipped for uptodate blocks.

Faiblesses (CWE)

  • CWE-190 — Débordement d'entier

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected 9dc55f1389f9569acf9659e58dd836a9c70df217 < ce20f49ac9194cf81a77f01d1c316d7c17ae753c ; affected 9dc55f1389f9569acf9659e58dd836a9c70df217 < 275b37a1e5c2c8abd313e8075f6aec9a349f291b ; affected 9dc55f1389f9569acf9659e58dd836a9c70df217 < b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac ; affected 9dc55f1389f9569acf9659e58dd836a9c70df217 < 82b60ffbb532d919959702768dca04c3c0500ae5 ; affected 9dc55f1389f9569acf9659e58dd836a9c70df217 < 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e ; affected 9dc55f1389f9569acf9659e58dd836a9c70df217 < 142194fb21afe964d2d194cab1fc357cbf87e899
Linux · Linuxaffected 4.19 ; unaffected 0 < 4.19 ; unaffected 5.10.267 ≤ 5.10.* ; unaffected 5.15.218 ≤ 5.15.* ; unaffected 6.1.185 ≤ 6.1.* ; unaffected 6.6.120 ≤ 6.6.*

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