CVE-2026-98121: In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix NULL pointer deref

Q: How do I fix CVE-2026-98121?

linux kernel: upgrade to 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-98121 being exploited?

CVE-2026-98121 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-98121 affect?

CVE-2026-98121 affects linux kernel. Severity is medium (CVSS 5.5). In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix NULL pointer dereference in PM callbacks msc313e_wdt_probe() doesn't set the driver data for the platform device. As a result, dev_get_drvdata() in

Q: How urgent is CVE-2026-98121?

Priority 25/100. On your watchlist

Routine

MEDIUM 5.5WATCHLISTUPGRADE

CVE-2026-98121 is a medium-severity flaw (CVSS 5.5) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix NULL pointer dereference in PM callbacks msc313e_wdt_probe() doesn't set the driver data for the platform device. As a result, dev_get_drvdata() in msc313e_wdt_suspend() and msc313e_wdt_resume() will return NULL, leading to a NULL pointer dereference afterward. Set the platform device driver data in msc313e_wdt_probe().

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-09-25
Last modified	2026-10-22

Publisher (CNA): kernel.org · Vendor: linux

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-25Published CVE record published
2026-10-22 17:23 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 5.14 and < 5.15.222 · >= 5.16 and < 6.1.189 · >= 6.2 and < 6.6.158 · >= 6.7 and < 6.12.111 · >= 6.13 and < 6.18.53 · >= 6.19 and < 7.2.7 · 7.3 rc1 · 7.3 rc2

Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-98121?

linux kernel: upgrade to 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7. Exact commands for each OS are on this page.

Is CVE-2026-98121 being exploited?

CVE-2026-98121 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-98121 affect?

CVE-2026-98121 affects linux kernel. Severity is medium (CVSS 5.5). In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix NULL pointer dereference in PM callbacks msc313e_wdt_probe() doesn't set the driver data for the platform device. As a result, dev_get_drvdata() in

How urgent is CVE-2026-98121?

Priority 25/100. On your watchlist

Software pages

Linux kernel vulnerabilities

Related CVEs

CVE-2026-64439 CRITICAL 9.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - filter out async aead impl
CVE-2026-64312 HIGH 7.5 UPGRADE In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - restore callback for non
CVE-2026-64313 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: crypto: ecc - Fix carry overflow in vli m
CVE-2026-64438 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown rac
CVE-2026-64270 HIGH 7.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - reject an oversized devic

References

← Back to latest CVEs