What is CVE-2026-98174?

CVE-2026-98174 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10. CVE-2026-98174 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98174?

CVE-2026-98174 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-98174?

Yes, CVE-2026-98174 has been patched. Fixed versions include 6.6.158, 6.12.112, 6.18.54 and others.

Is CVE-2026-98174 actively exploited?

CVE-2026-98174 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-98174

High

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix rlist race and missing initialization TCP_Server_Info.rlist is allocated via kzalloc which zeros both ->next and ->prev to NULL instead of pointing to itself, making list_empty() always return false and list_add() dereference a NULL ->prev pointer. Also, cifs_signal_cifsd_for_reconnect() can be called concurrently from multiple cifsd threads, allowing the same server's rlist node to be added twice into the local list, corrupting it.

Package Linux Kernel

Published 2026-10-06

Last modified 2026-10-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Fixed in 6.6.158, 6.12.112, 6.18.54, 7.2.8, 7.3-rc4 and their respective stable series.

Fixed in

✓ 6.6.158 6.6.x ✓ 6.12.112 6.12.x ✓ 6.18.54 6.18.x ✓ 7.2.8 7.2.x ✓ 7.3-rc4

References

5 total

Details

CVE ID CVE-2026-98174

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-10-06

Modified 2026-10-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-98174?

CVE-2026-98174 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . CVE-2026-98174 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-98174?

CVE-2026-98174 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-98174?

Yes. CVE-2026-98174 has been patched. Fixed versions include 6.6.158, 6.12.112, 6.18.54 and others.
Is CVE-2026-98174 actively exploited?

No. CVE-2026-98174 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.