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VulnerabilityPublished Updated

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

Source GCVE Database

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Authoritative record:CVE-2026-93104· High

Not known to be exploited · fixed in b7129930d1ec46c03a0de07fdce6c29f75795006 : patch Linux kernel soon.

Data as of 30 Oct 2026, 18:03 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in b7129930d1ec46c03a0de07fdce6c29f75795006, b1e1b25723af44328524c7b54433e4bf0ab9930c, 80968b42d13080bf7bc1f3ee17fef126ce2ad98f +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < b7129930d1ec46c03a0de07fdce6c29f75795006
Fixed in
  • b7129930d1ec46c03a0de07fdce6c29f75795006
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < b1e1b25723af44328524c7b54433e4bf0ab9930c
Fixed in
  • b1e1b25723af44328524c7b54433e4bf0ab9930c
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 80968b42d13080bf7bc1f3ee17fef126ce2ad98f
Fixed in
  • 80968b42d13080bf7bc1f3ee17fef126ce2ad98f
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f
Fixed in
  • 2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 32d2cdb0f3cac430b04124c3b7248851fe2037f8
Fixed in
  • 32d2cdb0f3cac430b04124c3b7248851fe2037f8
LinuxLinuxAffected
  • ≥ ff6acd69518e0a84bd9c9b7f1bd4313f7076db97, < 5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1
Fixed in
  • 5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1

AI-suggested

A fix has been implemented in the Linux kernel to return NULL immediately after port allocation failure, preventing use-after-free. Users should apply the official kernel updates that include this fix once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.

Description

A use-after-free vulnerability exists in the Linux kernel's RDMA/rvt subsystem due to improper handling of port allocation failure. The function rvt_alloc_device() deallocates the device but returns a pointer to the freed memory, causing callers to dereference an invalid pointer. This issue has been resolved by returning NULL immediately after deallocation to signal allocation failure.

References

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