VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-93104: Linux kernel · RDMA/rvt: Return NULL after port allocation failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in b7129930d1ec46c03a0de07fdce6c29f75795006 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 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 b7129930d1ec46c03a0de07fdce6c29f75795006, b1e1b25723af44328524c7b54433e4bf0ab9930c, 80968b42d13080bf7bc1f3ee17fef126ce2ad98f +2

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 ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < b7129930d1ec46c03a0de07fdce6c29f75795006	Fixed in b7129930d1ec46c03a0de07fdce6c29f75795006
LinuxLinux	Affected ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < b1e1b25723af44328524c7b54433e4bf0ab9930c	Fixed in b1e1b25723af44328524c7b54433e4bf0ab9930c
LinuxLinux	Affected ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 80968b42d13080bf7bc1f3ee17fef126ce2ad98f	Fixed in 80968b42d13080bf7bc1f3ee17fef126ce2ad98f
LinuxLinux	Affected ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f	Fixed in 2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f
LinuxLinux	Affected ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1	Fixed in 5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1
LinuxLinux	Affected =4.6	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rvt: Return NULL after port allocation failure rvt_alloc_device() deallocates the IB device when its port array cannot be allocated but then returns the pointer to the released allocation. Callers treat any non-NULL value as valid and dereference it, resulting in a use-after-free. Return NULL immediately after deallocation so callers can propagate the allocation failure.

References

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