01 Record

CVE-2025-39929

smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

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

0.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 24.0% 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 2026-10-19.

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

2025-10-04 07:30Z1 YR AGO

Last updated

2026-10-15 22:02Z13 DAYS AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.2

Document digest

9da6f980e1e5b320e638de208a9ac99d6bbc04bb1423b6623a11fd8a48a60c71

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxf198186aa9bbd60fae7a2061f4feec614d880299 to < 5aa69aabcb275a8012265233c7694076ce1d9102, f198186aa9bbd60fae7a2061f4feec614d880299 to < aa4cf7615328eae44f3b4bf5f4fde3fb390c27c6, f198186aa9bbd60fae7a2061f4feec614d880299 to < 3d7c075c878ac844e33c43e506c2fa27ac7e9689, f198186aa9bbd60fae7a2061f4feec614d880299 to < e7b7a93879558e77d950f1ff9a6f3daa385b33df, f198186aa9bbd60fae7a2061f4feec614d880299 to < 922338efaad63cfe30d459dfc59f9d69ff93ded4, f198186aa9bbd60fae7a2061f4feec614d880299 to < 0991418bf98f191d0c320bd25245fcffa1998c7e, f198186aa9bbd60fae7a2061f4feec614d880299 to < daac51c7032036a0ca5f1aa419ad1b0471d1c6e0, 4.16—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/5aa69aabcb275a8012265233c7694076ce1d9102
git.kernel.orghttps://git.kernel.org/stable/c/aa4cf7615328eae44f3b4bf5f4fde3fb390c27c6
git.kernel.orghttps://git.kernel.org/stable/c/3d7c075c878ac844e33c43e506c2fa27ac7e9689
git.kernel.orghttps://git.kernel.org/stable/c/e7b7a93879558e77d950f1ff9a6f3daa385b33df
git.kernel.orghttps://git.kernel.org/stable/c/922338efaad63cfe30d459dfc59f9d69ff93ded4
git.kernel.orghttps://git.kernel.org/stable/c/0991418bf98f191d0c320bd25245fcffa1998c7e
git.kernel.orghttps://git.kernel.org/stable/c/daac51c7032036a0ca5f1aa419ad1b0471d1c6e0
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html

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 6.16.9-1

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