01 Record

CVE-2025-21963

cifs: Fix integer overflow while processing acdirmax mount option

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

cifs: Fix integer overflow while processing acdirmax mount option

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.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
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

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. 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

2025-04-01 15:46Z1 YR AGO

Last updated

2026-05-11 21:09Z3 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

01db367be0a70d5453fbaecc3eeb565203675979968380bb1c2a0111076ffe35

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 0c26edf477e093cefc41637f5bccc102e1a77399, 4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 39d086bb3558da9640ef335f97453e01d32578a1, 4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 9e438d0410a4002d24f420f2c28897ba2dc0af64, 4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 2809a79bc64964ce02e0c5f2d6bd39b9d09bdb3c, 4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 6124cbf73e3dea7591857dd63b8ccece28952afd, 4c9f948142a550af416a2bfb5e56d29ce29e92cf to < 5b29891f91dfb8758baf1e2217bef4b16b2b165b, 5.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/0c26edf477e093cefc41637f5bccc102e1a77399
git.kernel.orghttps://git.kernel.org/stable/c/39d086bb3558da9640ef335f97453e01d32578a1
git.kernel.orghttps://git.kernel.org/stable/c/9e438d0410a4002d24f420f2c28897ba2dc0af64
git.kernel.orghttps://git.kernel.org/stable/c/2809a79bc64964ce02e0c5f2d6bd39b9d09bdb3c
git.kernel.orghttps://git.kernel.org/stable/c/6124cbf73e3dea7591857dd63b8ccece28952afd
git.kernel.orghttps://git.kernel.org/stable/c/5b29891f91dfb8758baf1e2217bef4b16b2b165b
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

01 Record index

CVE-2025-21963

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21963

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References