VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93110: Linux kernel · RDMA/core: Wait for RCU callbacks before unloading ib_core

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 7853af5f15738dc00aebaa1fc9f1f0df40f6f603 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 7853af5f15738dc00aebaa1fc9f1f0df40f6f603, 1646e123e56c3ad679fbfb571e8eef6386efb729, 82dfd1df456227279b1c8c648983a530f2612098 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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 ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 7853af5f15738dc00aebaa1fc9f1f0df40f6f603	Fixed in 7853af5f15738dc00aebaa1fc9f1f0df40f6f603
LinuxLinux	Affected ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 1646e123e56c3ad679fbfb571e8eef6386efb729	Fixed in 1646e123e56c3ad679fbfb571e8eef6386efb729
LinuxLinux	Affected ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 82dfd1df456227279b1c8c648983a530f2612098	Fixed in 82dfd1df456227279b1c8c648983a530f2612098
LinuxLinux	Affected ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 48b72fa0d209a92fb51b834a6080171cfa207b2c	Fixed in 48b72fa0d209a92fb51b834a6080171cfa207b2c
LinuxLinux	Affected ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 9d998297fdaf47492f6679287f6552879d1a7e3a	Fixed in 9d998297fdaf47492f6679287f6552879d1a7e3a
LinuxLinux	Affected ≥ 943bd984b108b3bb778790c2da4ae8d186b547e6, < 8e4f1677c09d75d738099f42afcf65d8587b664a	Fixed in 8e4f1677c09d75d738099f42afcf65d8587b664a

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Wait for RCU callbacks before unloading ib_core put_gid_ndev() is queued with call_rcu() and implemented in ib_core. Stopping the workqueues does not drain callbacks already queued, so RCU could invoke it after the module code has been unloaded. synchronize_rcu() does not wait for callbacks. Wait for them after all producers have stopped.

References

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