VulnerabilityPublished 23 Oct 2026

CVE-2026-98903: Linux kernel · mailbox: imx: Add a channel shutdown field

Source GCVE Database

Authoritative record:CVE-2026-98903· Medium

Not known to be exploited · fixed in 02273054b2e94e53065ea5644265bb9d8f7ee2a7 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 02273054b2e94e53065ea5644265bb9d8f7ee2a7, 944d8509c2220a2313d4a094a646507929fb6f8d, 5ccea7eacb7786c358833634f45700365f6c1d99

Exploitation evidence

Disclosed: evidence found.
CVE published 23 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-6pc9-8xrq-jmj4

What to do

Upgrade Linux kernel to 02273054b2e94e53065ea5644265bb9d8f7ee2a7, 944d8509c2220a2313d4a094a646507929fb6f8d or 5ccea7eacb7786c358833634f45700365f6c1d99.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0a67003b1985c79811160af1b01aca07cd5fbc53, < 02273054b2e94e53065ea5644265bb9d8f7ee2a7	Fixed in 02273054b2e94e53065ea5644265bb9d8f7ee2a7
LinuxLinux	Affected ≥ 0a67003b1985c79811160af1b01aca07cd5fbc53, < 944d8509c2220a2313d4a094a646507929fb6f8d	Fixed in 944d8509c2220a2313d4a094a646507929fb6f8d
LinuxLinux	Affected ≥ 0a67003b1985c79811160af1b01aca07cd5fbc53, < 5ccea7eacb7786c358833634f45700365f6c1d99	Fixed in 5ccea7eacb7786c358833634f45700365f6c1d99
LinuxLinux	Affected =5.7	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel by introducing a shutdown flag to properly serialize channel shutdown and interrupt event enabling. Users should update to the kernel version containing this fix once available. Patch status is not explicitly stated; check the vendor or Linux kernel advisory for the exact fixed versions and remediation guidance.

Description

A race condition vulnerability in the Linux kernel's imx mailbox driver was resolved by adding a channel shutdown field. The issue involved a timing window where the RX event could be re-enabled by an interrupt service routine while the shutdown process was waiting on free_irq(), potentially causing problems on shared interrupt handlers. This could lead to the irq-core shutting down the interrupt with a 'nobody cared' message if the removed channel triggered an interrupt.

References

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