CVE-2025-40099

CVE-2025-40099

Critical · published October 30, 2025

CVSS v3.1
9.4
EPSS
0%
Percentile
34.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00410 · 34.1th percentile
Published
2025-10-30T14:15Z
References (5)
https://git.kernel.org/stable/c/15c73964da9df994302f579ed14ee5fdbce7a332 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cfacc7441f760e4a73cc71b6ff1635261d534657 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 30 OCT 09:48Z
    cifs: parse_dfs_referrals: prevent oob on malformed input
    cvelistv5