Riskcovery

CVE-2025-40099

cifs: parse_dfs_referrals: prevent oob on malformed input

State
Published
Severity
9.4 Critical
Published
Oct 30, 2025
Updated
Oct 15, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

cifs: parse_dfs_referrals: prevent oob on malformed input

Malicious SMB server can send invalid reply to FSCTL_DFS_GET_REFERRALS

- reply smaller than sizeof(struct get_dfs_referral_rsp) - reply with number of referrals smaller than NumberOfReferrals in the header

Processing of such replies will cause oob.

Return -EINVAL error on such replies to prevent oob-s.

Scores

CVSSScoreVectorSource
3.19.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before cfacc7441f760e4a73cc71b6ff1635261d534657Affected
  • 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 15c73964da9df994302f579ed14ee5fdbce7a332Affected
  • 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058Affected
  • 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before bb0f2e66e1ac043a5b238f5bcab4f26f3c317039Affected
  • 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9Affected
LinuxLinux
  • 4.11Affected
  • before 4.11Not affected
  • 6.1.158 through 6.1.*Not affected
  • 6.6.114 through 6.6.*Not affected
  • 6.12.55 through 6.12.*Not affected
  • 6.17.5 through 6.17.*Not affected
  • 6.18 and laterNot affected

References

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