01 Record

CVE-2025-40099

cifs: parse_dfs_referrals: prevent oob on malformed input

CriticalPUBLISHEDCNA: Linux

CNA base score9.4 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

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02 Description

cifs: parse_dfs_referrals: prevent oob on malformed input

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 34.9% of scored records. A rank, not a probability.

NVD base score

9.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-10-19.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2025-10-30 09:48Z12 MO AGO
Last updated: 2026-10-15 22:02Z13 DAYS AGO
Reserved: 2025-04-16
Assigning CNA: Linux
Record state: PUBLISHED
Severity: Critical (CVSS 9.4)
CNA CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: c9dc0f0c004365474b4d23ed0f0f1e76e78d62a7b2ea4c545e6c4ab60b7e6b6e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad to < cfacc7441f760e4a73cc71b6ff1635261d534657, 4ecce920e13ace16a5ba45efe8909946c28fb2ad to < 15c73964da9df994302f579ed14ee5fdbce7a332, 4ecce920e13ace16a5ba45efe8909946c28fb2ad to < 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058, 4ecce920e13ace16a5ba45efe8909946c28fb2ad to < bb0f2e66e1ac043a5b238f5bcab4f26f3c317039, 4ecce920e13ace16a5ba45efe8909946c28fb2ad to < 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9, 4.11—

06 References

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

07 Fixed in

Debian 12

linux
Fixed in 6.1.158-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.57-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.17.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.