CVE-2026-74608Critical· 9.8▾ Midnight

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_try_adding_channels() cifs_try_adding_channels() takes a temporary reference to an interface before dropping iface_lock

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_try_adding_channels() cifs_try_adding_channels() takes a temporary reference to an interface before dropping iface_lock. If cif…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score54/ 100 · Moderate

impact 53.9 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 22, 2026

Updated

Oct 16, 2026

CVSS

9.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

54 · Moderate

EPSS

0.48% · p41

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 14.

0.5% → 0.5%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 55 days

Aug 22, 2026Published
Disclosed via NVD
Oct 14, 2026EPSS first tracked
0.5%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= cbc53148cc0946b72d62a3c53870cb22ce4ec284 < 64d7584e62ac8cdc750455c5fdc6008fc2de4f06
Linux >= cff97d683a083b862a8bb24309e0f4d2d928128a < c292d4686f717c03e5022fc4ae7c782f39a94915
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 47dfac48bce7198ad4f1a388fc8c9491f878ac3b
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 1ffacbadc14530e55b8d86f7b917524f6a0fb891
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 4986410316b1ae0e63c6ce418e4eb196723626e7
Linux 22a6c5b3425f327e7f4c3606a72277dce82c7d83
Linux >= 6.1.78 < 6.1.183
Linux >= 6.6.17 < 6.6.152
Linux >= 6.7.5 < 6.8
Linux 6.8

Full technical detail▾

Overview

In the Linux kernel, the following vulnerability has been resolved:

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

cifs_try_adding_channels() takes a temporary reference to an interface before dropping iface_lock. If cifs_ses_add_channel() fails, it drops that reference and then increments iface->weight_fulfilled.

A concurrent interface list refresh can remove the list reference while channel creation is in progress. In that case, the failure-path kref_put() releases the last reference and frees iface. Updating weight_fulfilled afterward then accesses freed memory.

Increment weight_fulfilled before dropping the temporary reference, keeping iface alive for the final access.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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CVE-2026-74608Critical· 9.8▾ Midnight

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_try_adding_channels() cifs_try_adding_channels() takes a temporary reference to an interface before dropping iface_lock

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score54/ 100 · Moderate

impact 53.9 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 22, 2026

Updated

Oct 16, 2026

CVSS

9.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

54 · Moderate

EPSS

0.48% · p41

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 14.

0.5% → 0.5%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 55 days

Aug 22, 2026Published
Disclosed via NVD
Oct 14, 2026EPSS first tracked
0.5%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= cbc53148cc0946b72d62a3c53870cb22ce4ec284 < 64d7584e62ac8cdc750455c5fdc6008fc2de4f06
Linux >= cff97d683a083b862a8bb24309e0f4d2d928128a < c292d4686f717c03e5022fc4ae7c782f39a94915
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 47dfac48bce7198ad4f1a388fc8c9491f878ac3b
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 1ffacbadc14530e55b8d86f7b917524f6a0fb891
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805
Linux >= 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 < 4986410316b1ae0e63c6ce418e4eb196723626e7
Linux 22a6c5b3425f327e7f4c3606a72277dce82c7d83
Linux >= 6.1.78 < 6.1.183
Linux >= 6.6.17 < 6.6.152
Linux >= 6.7.5 < 6.8
Linux 6.8

Full technical detail▾

Overview

In the Linux kernel, the following vulnerability has been resolved:

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

Increment weight_fulfilled before dropping the temporary reference, keeping iface alive for the final access.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org