CVE-2025-40099cifs: parse_dfs_referrals: prevent oob on malformed input
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 9.4 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4ecce920e13ace16a5ba45efe8909946c28fb2ad before cfacc7441f760e4a73cc71b6ff1635261d534657; from 4ecce920e13ace16a5ba45efe8909946c28fb2ad before 15c73964da9df994302f579ed14ee5fdbce7a332; from 4ecce920e13ace16a5ba45efe8909946c28fb2ad before 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058; from 4ecce920e13ace16a5ba45efe8909946c28fb2ad before bb0f2e66e1ac043a5b238f5bcab4f26f3c317039; from 4ecce920e13ace16a5ba45efe8909946c28fb2ad before 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 | CNA record |
References
- https://git.kernel.org/stable/c/cfacc7441f760e4a73cc71b6ff1635261d534657
- https://git.kernel.org/stable/c/15c73964da9df994302f579ed14ee5fdbce7a332
- https://git.kernel.org/stable/c/8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058
- https://git.kernel.org/stable/c/bb0f2e66e1ac043a5b238f5bcab4f26f3c317039
- https://git.kernel.org/stable/c/6447b0e355562a1ff748c4a2ffb89aae7e84d2c9
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.