01 Record

CVE-2026-74608

smb: client: Fix use-after-free in cifs_try_adding_channels()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

smb: client: Fix use-after-free in cifs_try_adding_channels()

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 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

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 40.9% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/A:H

NVD analysis status

Received. NVD last modified this record on 2026-10-16.

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

2026-08-22 15:31Z2 MO AGO

Last updated

2026-10-16 19:06Z12 DAYS AGO

Reserved

2026-08-15

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

cac7ea3c2ddf5d7be0291d2c7f54808879704d3bd8ce094198e2f3b68cce55fa

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxcbc53148cc0946b72d62a3c53870cb22ce4ec284 to < 64d7584e62ac8cdc750455c5fdc6008fc2de4f06, cff97d683a083b862a8bb24309e0f4d2d928128a to < c292d4686f717c03e5022fc4ae7c782f39a94915, 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 to < 47dfac48bce7198ad4f1a388fc8c9491f878ac3b, 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 to < 1ffacbadc14530e55b8d86f7b917524f6a0fb891, 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 to < 1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805, 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 to < 4986410316b1ae0e63c6ce418e4eb196723626e7, 22a6c5b3425f327e7f4c3606a72277dce82c7d83, 6.1.78 to < 6.1.183, 6.6.17 to < 6.6.152, 6.7.5 to < 6.8, 6.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06
git.kernel.orghttps://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915
git.kernel.orghttps://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b
git.kernel.orghttps://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891
git.kernel.orghttps://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805
git.kernel.orghttps://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7

07 Fixed in

Debian 12

linux
Fixed in 6.1.187-1
linux-6.12
Fixed in 6.12.107-1~deb12u1

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

Debian 13

linux
Fixed in 6.12.105-1

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

Debian 14

linux
Fixed in 7.1.9-1

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