CVE-2026-97477: Linux kernel · RDMA/counter: Fix num_counters leak on bind_qp failure in alloc_and_bind()
Source GCVE Database
Not known to be exploited · fixed in da95cb016812c0e012ea839f191926e35ca8f57f : update Linux kernel when convenient.
Data as of 30 Oct 2026, 17:52 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in da95cb016812c0e012ea839f191926e35ca8f57f, 4517686789b404827591c52f79e9a57822371ca0, 7c9fee40fc8d8d928f44e99bc6e6adf93f9f2c2a +2
Exploitation evidence
Disclosed: evidence found.
CVE published 24 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– |
AI-suggested
A fix has been implemented in the Linux kernel to properly decrement num_counters on bind_qp failure and restore port state. Users should apply the official kernel update that includes this fix once available. No other mitigation actions are indicated.
Description
A resource leak vulnerability in the Linux kernel's RDMA counter subsystem was fixed. The issue occurs when __rdma_counter_bind_qp() fails during alloc_and_bind(), causing a leak of the num_counters counter due to improper error handling. This leak accumulates with repeated failures, preventing the port from switching to AUTO mode and blocking mode reversion, which can affect port state management.
References
- nvd.nist.gov/vuln/detail/CVE-2026-97477 (opens in a new tab)
- git.kernel.org/stable/c/1bcdeddddffadff9993657f6b0e5535d66ebd10f (opens in a new tab)
- git.kernel.org/stable/c/4517686789b404827591c52f79e9a57822371ca0 (opens in a new tab)
- git.kernel.org/stable/c/4fbc8230009f5b1bcd13cc74c5a6a43ddba141fd (opens in a new tab)
- git.kernel.org/stable/c/7c9fee40fc8d8d928f44e99bc6e6adf93f9f2c2a (opens in a new tab)
- git.kernel.org/stable/c/da95cb016812c0e012ea839f191926e35ca8f57f (opens in a new tab)