VulnerabilityPublished 15 Aug 2026Updated 6 Nov 2026

CVE-2026-72290: Linux kernel · KVM: s390: pci: Fix GISC refcount leak on AIF enable failure

Affects Linux kernelSource CVE Database V5

Compare

Not known to be exploited · fixed in adce12bb0e0dc82d1d6f0821c9faee3145e62a6f : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in adce12bb0e0dc82d1d6f0821c9faee3145e62a6f, 3882224b0e714f34de91e5f28307c5d3fccfe8f8, 7b69729046a4c58f4cb457184e5ac4aaa179bff4 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < adce12bb0e0dc82d1d6f0821c9faee3145e62a6f	Fixed in adce12bb0e0dc82d1d6f0821c9faee3145e62a6f
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 3882224b0e714f34de91e5f28307c5d3fccfe8f8	Fixed in 3882224b0e714f34de91e5f28307c5d3fccfe8f8
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 7b69729046a4c58f4cb457184e5ac4aaa179bff4	Fixed in 7b69729046a4c58f4cb457184e5ac4aaa179bff4
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 6e69317cd44a2f21f8f7a9d93eb3220e868adfa8	Fixed in 6e69317cd44a2f21f8f7a9d93eb3220e868adfa8
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 6cd6e1c978784eec9032e2fe94a53e62b674fe3e	Fixed in 6cd6e1c978784eec9032e2fe94a53e62b674fe3e
LinuxLinux	Affected ≥ 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 5fb75c5272950b3ebe8bdee7abfdafd44f38313b	Fixed in 5fb75c5272950b3ebe8bdee7abfdafd44f38313b

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix GISC refcount leak on AIF enable failure kvm_s390_gisc_register() registers the guest ISC before pinning the guest interrupt forwarding pages and allocating the AISB bit. If any of the later setup steps fails, the function unwinds the pinned pages and other local state, but does not unregister the GISC reference. Add the missing kvm_s390_gisc_unregister() to the error unwind path.

References

Community reviews

Loading reviews…