VulnerabilityPublished 18 Oct 2026

CVE-2026-98615: Linux kernel · eth: fbnic: Set AW_FLUSH_MODE alongside AW_FLUSH when flushing the mailbox

Source GCVE Database

Authoritative record:CVE-2026-98615· Medium

Not known to be exploited · fixed in ed4163f6ba9b52bfd6216d5215ee7b8eb5072411 : 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 ed4163f6ba9b52bfd6216d5215ee7b8eb5072411, a969db6548a1b046cd1423701f5f9c3f5794e90d, 8947f13e436a4ff5eed9f8f019b2865a07af4bb2 +3

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-83c5-m4vx-chr4

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.12.29 <6.12.112 >=6.14.7 <6.15	Fixed in ed4163f6ba9b52bfd6216d5215ee7b8eb5072411 a969db6548a1b046cd1423701f5f9c3f5794e90d 8947f13e436a4ff5eed9f8f019b2865a07af4bb2 8a052cd4b2caee1f90cf0e3874377066939c90e7 6.15 6.12.112
LinuxLinux	Affected =6.15	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to set AW_FLUSH_MODE alongside AW_FLUSH during mailbox flushing in the fbnic driver. Users should apply the official kernel update containing this fix when available. Since this is a kernel-level fix, upgrading to the patched kernel version is the recommended remediation. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisory for the exact fixed version and update accordingly.

Description

A vulnerability in the Linux kernel's fbnic network driver related to flushing the firmware mailbox Rx ring has been resolved. The issue involved improper handling of the AW_FLUSH and AW_FLUSH_MODE bits during mailbox teardown, which caused staged write requests to remain in the pipeline indefinitely. This could prevent the flush operation from completing as expected. The fix sets both AW_FLUSH and AW_FLUSH_MODE bits to ensure staged writes drain correctly while maintaining device stability. The read path is unaffected by this issue.

References

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