01 Record

CVE-2025-37947

ksmbd: prevent out-of-bounds stream writes by validating *pos

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

ksmbd: prevent out-of-bounds stream writes by validating *pos

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total 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

0.65% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 51.1% of scored records. A rank, not a probability.

NVD base score

7.8 (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:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-30.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2025-05-20 16:01Z1 YR AGO

Last updated

2026-08-05 11:58Z2 MO AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

469bcd5b92e0f1350ccc1e2a7625f5aebcdf0cde0973294933ba449be496dff8

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf to < 7f61da79df86fd140c7768e668ad846bfa7ec8e1, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 04c8a38c60346bb5a7c49b276de7233f703ce9cb, 0626e6641f6b467447c81dd7678a69c66f7746cf to < d62ba16563a86aae052f96d270b3b6f78fca154c, 0626e6641f6b467447c81dd7678a69c66f7746cf to < e6356499fd216ed6343ae0363f4c9303f02c5034, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 0ca6df4f40cf4c32487944aaf48319cb6c25accc, 5.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1
git.kernel.orghttps://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb
git.kernel.orghttps://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c
git.kernel.orghttps://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034
git.kernel.orghttps://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc
github.comhttps://github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-37947.cexploit
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.140-1

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

Debian 13

linux
Fixed in 6.12.29-1

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

Debian 14

linux
Fixed in 6.12.29-1

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