What is CVE-2026-98175?

CVE-2026-98175 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 3.10.107 onward and patched in 6.6.158, 6.12.112, 6.18.54 and others. CVE-2026-98175 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98175?

CVE-2026-98175 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-2026-98175?

Yes, CVE-2026-98175 has been patched. Fixed versions include 6.6.158, 6.12.112, 6.18.54 and others. If you are running Linux kernel 3.10.107 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-98175 actively exploited?

CVE-2026-98175 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-98175

High

In the Linux kernel, the following vulnerability has been resolved: smb: client: cancel reconnect work in clean_demultiplex_info() clean_demultiplex_info() cancels server->echo delayed work but not server->reconnect, which can cause a use-after-free when the demultiplex thread exits while a reconnect work is still queued: cifs_demultiplex_thread() cifs_readv_from_socket() cifs_reconnect() __cifs_reconnect() cifs_queue_server_reconn() mod_delayed_work(cifsiod_wq, &server->reconnect, 0) clean_demultiplex_info() cancel_delayed_work_sync(&server->echo) // echo canceled // reconnect NOT canceled kfree_sensitive(server) // server freed ...later, on cifsiod_wq: smb2_reconnect_server() server->srv_count // UAF read of freed server Fix this by canceling server->reconnect delayed work in clean_demultiplex_info() before the server is freed, the same way cifs_put_tcp_session() already does.

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

Linux kernel versions 3.10.107, 3.12.70, 3.16.42, 3.18.47, 4.1.38, 4.4.40, 4.8.16, 4.9.1, 4.10 and later are affected. Fixed in 6.6.158, 6.12.112, 6.18.54, 7.2.8, 7.3-rc4 and their respective stable series.

Affected from

≥ 3.10.107 ≥ 3.12.70 ≥ 3.16.42 ≥ 3.18.47 ≥ 4.1.38 ≥ 4.4.40 ≥ 4.8.16 ≥ 4.9.1 ≥ 4.10

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-2026-98175

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-2026-98175?

CVE-2026-98175 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 3.10.107 onward and has been patched in 6.6.158, 6.12.112, 6.18.54 and others. CVE-2026-98175 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-98175?

CVE-2026-98175 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-2026-98175?

Yes. CVE-2026-98175 has been patched. Fixed versions include 6.6.158, 6.12.112, 6.18.54 and others. If you are running Linux kernel 3.10.107 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-98175 actively exploited?

No. CVE-2026-98175 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.