CVE-2025-40099

cifs: parse_dfs_referrals: prevent oob on malformed input

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

30 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/15c73964da9df994302f579ed14ee5fdbce7a332 https://git.kernel.org/stable/c/6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 https://git.kernel.org/stable/c/8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 https://git.kernel.org/stable/c/bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 https://git.kernel.org/stable/c/cfacc7441f760e4a73cc71b6ff1635261d534657