VulnerabilityPublished 18 Oct 2026

CVE-2026-98651: Linux kernel · KVM: s390: Properly handle NULL pointer in dat_cond_set_storage_key()

Source GCVE Database

Authoritative record:CVE-2026-98651· Low

Not known to be exploited : upgrade to 75867536746ab2d034488a6a93ee6cde83553342 or 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1 when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 75867536746ab2d034488a6a93ee6cde83553342, 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-7vxp-j7m5-7gf4

What to do

Upgrade Linux kernel to 75867536746ab2d034488a6a93ee6cde83553342 or 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8e03e8316eb242af307d1c789d09f1a1457cf9a3, < 75867536746ab2d034488a6a93ee6cde83553342	Fixed in 75867536746ab2d034488a6a93ee6cde83553342
LinuxLinux	Affected ≥ 8e03e8316eb242af307d1c789d09f1a1457cf9a3, < 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1	Fixed in 88e22ffd1e46b95e40a6afabe486deb1d31a3ae1
LinuxLinux	Affected =7.0	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to properly handle NULL pointers in dat_cond_set_storage_key(). Users should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's KVM subsystem for s390 architecture involved improper handling of a NULL pointer in the dat_cond_set_storage_key() function. This could lead to a NULL pointer dereference when certain callers pass NULL as oldkey to page_cond_set_storage_key(). The issue has been resolved by adding a NULL check and assigning a dummy local variable to prevent crashes.

References

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