VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93102: Linux kernel · RDMA/hfi1: Free RX data on late probe failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d1c91cb02e05fdd93411de707cc5c3c08375df9e : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:47 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · 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 d1c91cb02e05fdd93411de707cc5c3c08375df9e, cfad037c6d305876b877abc39fd4d7e2185e44f3, cd06c17afb08b37995f66cf560c2332a769b8f80 +4

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 ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < d1c91cb02e05fdd93411de707cc5c3c08375df9e	Fixed in d1c91cb02e05fdd93411de707cc5c3c08375df9e
LinuxLinux	Affected ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < cfad037c6d305876b877abc39fd4d7e2185e44f3	Fixed in cfad037c6d305876b877abc39fd4d7e2185e44f3
LinuxLinux	Affected ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < cd06c17afb08b37995f66cf560c2332a769b8f80	Fixed in cd06c17afb08b37995f66cf560c2332a769b8f80
LinuxLinux	Affected ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < 149a14ec70887ad14e820a7ca15738ded3d2d493	Fixed in 149a14ec70887ad14e820a7ca15738ded3d2d493
LinuxLinux	Affected ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < 83fe4e4f4fbf01d3832a24511c0ddfaccf5df9d8	Fixed in 83fe4e4f4fbf01d3832a24511c0ddfaccf5df9d8
LinuxLinux	Affected ≥ 4730f4a6c6b2065589c0822af00aa45e639bbc36, < 10e5e37495096b58f07adc4020de2701efc3a9e0	Fixed in 10e5e37495096b58f07adc4020de2701efc3a9e0

AI-suggested

A fix is available and has been applied in the Linux kernel source code as indicated by multiple commit hashes. Users and administrators should update to a Linux kernel version that includes these fixes. No additional mitigation actions are specified or required beyond applying the official patch.

Description

A vulnerability in the Linux kernel's RDMA hfi1 driver causes a resource leak when device initialization fails late in the probe process. Specifically, RX data allocated during initialization is not freed if certain later initialization steps fail, leading to memory leaks.

Impact

The vulnerability causes a resource leak (memory leak) in the kernel's RDMA hfi1 driver during device initialization failure scenarios. While this does not directly lead to code execution or privilege escalation, it can degrade system stability or performance over time due to unreleased resources.

Summary

CVE-2026-93102 addresses a resource leak in the Linux kernel's RDMA hfi1 driver. During device initialization, the function hfi1_init_dd() allocates shared RX support structures. If subsequent initialization functions such as hfi1_init() or hfi1_register_ib_device() fail, the cleanup routine init_one() tears down device data but does not call hfi1_free_rx(), resulting in leaked netdev_rx and its dummy netdev. The fix involves freeing the RX support after IB unregistration and before postinit_cleanup(), aligning with the normal device removal procedure. This vulnerability affects Linux kernel version 5.8 and has been fixed in several commits identified by their hashes.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 14:47 UTC

Technical details

References

Community reviews

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