smb: client: fix potential UAF in smb2_close_cached_fid() (Linux Linux)

CVE-2025-40328
HIGH 8.8

At a glance

Source
NVD
EPSS
EPSS 0.46 % · percentile 40 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_close_cached_fid() find_or_create_cached_dir() could grab a new reference after kref_put() had seen the refcount drop to zero but before cfid_list_lock is acquired in smb2_close_cached_fid(), leading to use-after-free. Switch to kref_put_lock() so cfid_release() is called with cfid_list_lock held, closing that gap.

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected ebe98f1447bbccf8228335c62d86af02a0ed23f7 < bb3355ce9dcaba1b4a766f98b2ad373cab6cd626 ; affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 < cb52d9c86d70298de0ab7c7953653898cbc0efd6 ; affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 < 065bd62412271a2d734810dd50336cae88c54427 ; affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 < bdb596ceb4b7c3f28786a33840263728217fbcf5 ; affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 < 734e99623c5b65bf2c03e35978a0b980ebc3c2f8
Linux · Linuxaffected 6.1 ; unaffected 0 < 6.1 ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.117 ≤ 6.6.* ; unaffected 6.12.58 ≤ 6.12.* ; unaffected 6.17.8 ≤ 6.17.*

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