VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-53117: Linux kernel · s390/cio: use generic driver_override infrastructure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c4295487124f461405e1ef64dfa8c4ab0cb7ebcf : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

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 c4295487124f461405e1ef64dfa8c4ab0cb7ebcf, b660ba045b2b22cf3b4be72773de00cb48f47be5, ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 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 ≥ ebc3d179150347f3b6d97d8f249378bb2218f95e, < c4295487124f461405e1ef64dfa8c4ab0cb7ebcf	Fixed in c4295487124f461405e1ef64dfa8c4ab0cb7ebcf
LinuxLinux	Affected ≥ ebc3d179150347f3b6d97d8f249378bb2218f95e, < b660ba045b2b22cf3b4be72773de00cb48f47be5	Fixed in b660ba045b2b22cf3b4be72773de00cb48f47be5
LinuxLinux	Affected ≥ ebc3d179150347f3b6d97d8f249378bb2218f95e, < ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4	Fixed in ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4
LinuxLinux	Affected ≥ ebc3d179150347f3b6d97d8f249378bb2218f95e, < 2081957d8c323ffb58a10bc64837717ac5a042a1	Fixed in 2081957d8c323ffb58a10bc64837717ac5a042a1
LinuxLinux	Affected ≥ ebc3d179150347f3b6d97d8f249378bb2218f95e, < 106d594711e97762788046c5bbb94f580abc4bf4	Fixed in 106d594711e97762788046c5bbb94f580abc4bf4
LinuxLinux	Affected =5.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: s390/cio: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1]

References

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