VulnerabilityPublished 25 Sep 2026Updated 19 Oct 2026

CVE-2026-97980: Linux kernel · s390/debug: Fix NULL pointer dereference in debug_set_level()

Affects Linux kernelSource CVE Database V5

Not known to be exploited : upgrade to b1eb31d533cdfcae1011ed53850d52f36afe5774 or 716e1cd3783806929407dbd596e6b1118971eb9e when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

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 b1eb31d533cdfcae1011ed53850d52f36afe5774, 716e1cd3783806929407dbd596e6b1118971eb9e

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 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.

What to do

Upgrade Linux kernel to b1eb31d533cdfcae1011ed53850d52f36afe5774 or 716e1cd3783806929407dbd596e6b1118971eb9e.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a2cec6863709d6673a025acc066c962b85a75842, < b1eb31d533cdfcae1011ed53850d52f36afe5774	Fixed in b1eb31d533cdfcae1011ed53850d52f36afe5774
LinuxLinux	Affected ≥ a2cec6863709d6673a025acc066c962b85a75842, < 716e1cd3783806929407dbd596e6b1118971eb9e	Fixed in 716e1cd3783806929407dbd596e6b1118971eb9e
LinuxLinux	Affected =7.2	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: s390/debug: Fix NULL pointer dereference in debug_set_level() Commit a2cec6863709 ("s390/debug: Add s390dbf kernel parameter") incorrectly removed a null-id check from debug_set_level(), introducing a possible NULL pointer dereference for debug-API users that put debug_register() results unchecked into debug_set_level(). Fix this by moving the check from the internal _debug_set_level() variant back to the external debug_set_level() wrapper.

References

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