CVE-2026-93104: Linux kernel · RDMA/rvt: Return NULL after port allocation failure
Source GCVE Database
Not known to be exploited · fixed in b7129930d1ec46c03a0de07fdce6c29f75795006 : patch Linux kernel soon.
Data as of 30 Oct 2026, 18:03 UTC
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
Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- nvd.nist.gov/vuln/detail/CVE-2026-93104 (opens in a new tab)
- git.kernel.org/stable/c/2982eaf3b9d2d953318c74cd6f1b7576ea6d7b1f (opens in a new tab)
- git.kernel.org/stable/c/32d2cdb0f3cac430b04124c3b7248851fe2037f8 (opens in a new tab)
- git.kernel.org/stable/c/5a1a7a5e2fe1a15824fa9ae5edd8f008259471d1 (opens in a new tab)
- git.kernel.org/stable/c/80968b42d13080bf7bc1f3ee17fef126ce2ad98f (opens in a new tab)
- git.kernel.org/stable/c/b1e1b25723af44328524c7b54433e4bf0ab9930c (opens in a new tab)
- git.kernel.org/stable/c/b7129930d1ec46c03a0de07fdce6c29f75795006 (opens in a new tab)