VulnerabilityPublished 28 May 2026Updated 6 Nov 2026

CVE-2026-46127: Linux kernel · RDMA/ocrdma: Don't NULL deref uctx on errors in ocrdma_copy_pd_uresp()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ec44c00a4fe1327efa35083f98b39c01cb535a51 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in ec44c00a4fe1327efa35083f98b39c01cb535a51, e01a957561f663d3b68d2fd233a4502e3367efcd, b610f33c5523fe26f6dd897667fff9c7a1de5905 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 28 May 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < ec44c00a4fe1327efa35083f98b39c01cb535a51	Fixed in ec44c00a4fe1327efa35083f98b39c01cb535a51
LinuxLinux	Affected ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < e01a957561f663d3b68d2fd233a4502e3367efcd	Fixed in e01a957561f663d3b68d2fd233a4502e3367efcd
LinuxLinux	Affected ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < b610f33c5523fe26f6dd897667fff9c7a1de5905	Fixed in b610f33c5523fe26f6dd897667fff9c7a1de5905
LinuxLinux	Affected ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < 8832626a483439e207734e027afff322ccdf726e	Fixed in 8832626a483439e207734e027afff322ccdf726e
LinuxLinux	Affected ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < 443c991fbc954cc9363e963c09f404b9f281f3a2	Fixed in 443c991fbc954cc9363e963c09f404b9f281f3a2
LinuxLinux	Affected ≥ fe2caefcdf5869f308c102e3d64d40683bfad711, < 75fc130664ae324e7b2f9ad3630e0f175e9ca6c8	Fixed in 75fc130664ae324e7b2f9ad3630e0f175e9ca6c8

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/ocrdma: Don't NULL deref uctx on errors in ocrdma_copy_pd_uresp() Sashiko points out that pd->uctx isn't initialized until late in the function so all these error flow references are NULL and will crash. Use the uctx that isn't NULL.

References

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