01 Record

CVE-2026-31711

smb: server: fix active_num_conn leak on transport allocation failure

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: server: fix active_num_conn leak on transport allocation failure

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.55% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 46.0% of scored records. A rank, not a probability.
NVD base score: 7.5 (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:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-10-15.
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

2026-05-01 13:56Z6 MO AGO

Last updated

2026-10-15 01:18Z14 DAYS AGO

Reserved

2026-03-09

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
CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

752baab8f7a7c9c8ad22ffd080d1830cb81e4a4065d2eee3f6bcf3f3170a1ed7

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4210c3555db4b38bade92331b153e583261f05f9 to < dc2e7d595d68cf1be1ba64e3d30ebf3266bf7242, d5d7847e57ac69fa99c18b363a34419bcdb5a281 to < 60734c8bc3b4aa0672e251f08dda81977e4b5387, 0d0d4680db22eda1eea785c47bbf66a9b33a8b16 to < 97f8d2648ef4871e4cd335e2d769cb40054a6772, 0d0d4680db22eda1eea785c47bbf66a9b33a8b16 to < 295a9fc6789d1011c36ded9f0f2907bb34fa0de4, 0d0d4680db22eda1eea785c47bbf66a9b33a8b16 to < 283027aa93380380a0994f35dde3ec95318f2654, 0d0d4680db22eda1eea785c47bbf66a9b33a8b16 to < fb48185bcd946d42de7017cf27f912f8ab26acf0, 0d0d4680db22eda1eea785c47bbf66a9b33a8b16 to < 6551300dc452ac16a855a83dbd1e74899542d3b3, 5.15.91 to < 5.15.210, 6.1.9 to < 6.1.175, 6.2—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/dc2e7d595d68cf1be1ba64e3d30ebf3266bf7242
git.kernel.orghttps://git.kernel.org/stable/c/60734c8bc3b4aa0672e251f08dda81977e4b5387
git.kernel.orghttps://git.kernel.org/stable/c/97f8d2648ef4871e4cd335e2d769cb40054a6772
git.kernel.orghttps://git.kernel.org/stable/c/295a9fc6789d1011c36ded9f0f2907bb34fa0de4
git.kernel.orghttps://git.kernel.org/stable/c/283027aa93380380a0994f35dde3ec95318f2654
git.kernel.orghttps://git.kernel.org/stable/c/fb48185bcd946d42de7017cf27f912f8ab26acf0
git.kernel.orghttps://git.kernel.org/stable/c/6551300dc452ac16a855a83dbd1e74899542d3b3
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784472.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.176-1

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

Debian 13

linux
Fixed in 6.12.85-1

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

Debian 14

linux
Fixed in 7.0.3-1

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