VulnerabilityPublished 15 Aug 2026Updated 21 Oct 2026

CVE-2026-74389: Linux kernel · RDMA/hns: Fix log flood after cmd_mbox failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f3c9e84268e9fa613d40d6c138fb6969c35879b5 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Unrated

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 f3c9e84268e9fa613d40d6c138fb6969c35879b5, bbd97d71e53e551890e4115ad9de46b5f2ac0858, a6c5f5d98719e69228512390d5db3bf4b6468064 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9a4435375cd151e07c0c38fa601b00115986091b, < f3c9e84268e9fa613d40d6c138fb6969c35879b5	Fixed in f3c9e84268e9fa613d40d6c138fb6969c35879b5
LinuxLinux	Affected ≥ 9a4435375cd151e07c0c38fa601b00115986091b, < bbd97d71e53e551890e4115ad9de46b5f2ac0858	Fixed in bbd97d71e53e551890e4115ad9de46b5f2ac0858
LinuxLinux	Affected ≥ 9a4435375cd151e07c0c38fa601b00115986091b, < a6c5f5d98719e69228512390d5db3bf4b6468064	Fixed in a6c5f5d98719e69228512390d5db3bf4b6468064
LinuxLinux	Affected ≥ 9a4435375cd151e07c0c38fa601b00115986091b, < 66f44ec974ab372e4e1ee9eac4245237c94e8f68	Fixed in 66f44ec974ab372e4e1ee9eac4245237c94e8f68
LinuxLinux	Affected ≥ 9a4435375cd151e07c0c38fa601b00115986091b, < 7d9fbee252f84de3e6947a40eec01481c9d8afbb	Fixed in 7d9fbee252f84de3e6947a40eec01481c9d8afbb
LinuxLinux	Affected =4.9	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix log flood after cmd_mbox failure hns_roce_cmd_mbox() is the command interface between driver and hardware. When hardware is abnormal, the unlimited error printings after hns_roce_cmd_mbox() failure will cause log flood and even system crash. Replace ibdev_err() and ibdev_warn() with their ratelimited versions in the error handling path after hns_roce_cmd_mbox() (and its wrappers hns_roce_create_hw_ctx/hns_roce_destroy_hw_ctx) fails.

References

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