VulnerabilityPublished 11 Sep 2026Updated 21 Oct 2026

CVE-2026-89531: Linux kernel · svcrdma: Reject connection when transport allocation fails

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 0944462247dcb7de7622cdaaadf5f05c52707dab : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 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 0944462247dcb7de7622cdaaadf5f05c52707dab, 6e21754bbf75075f3fee1cebc79f3417364235ec, 5bf47bbea3c22c0af2293b6c393ab04d5420f7ab +2

Exploitation evidence

Disclosed: evidence found.
CVE published 11 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 ≥ 377f9b2f4529e0ac702fd7b91e216afd0adc959e, < 0944462247dcb7de7622cdaaadf5f05c52707dab	Fixed in 0944462247dcb7de7622cdaaadf5f05c52707dab
LinuxLinux	Affected ≥ 377f9b2f4529e0ac702fd7b91e216afd0adc959e, < 6e21754bbf75075f3fee1cebc79f3417364235ec	Fixed in 6e21754bbf75075f3fee1cebc79f3417364235ec
LinuxLinux	Affected ≥ 377f9b2f4529e0ac702fd7b91e216afd0adc959e, < 5bf47bbea3c22c0af2293b6c393ab04d5420f7ab	Fixed in 5bf47bbea3c22c0af2293b6c393ab04d5420f7ab
LinuxLinux	Affected ≥ 377f9b2f4529e0ac702fd7b91e216afd0adc959e, < 3cf372cec7ab2cd8c6002bf775cc14d90ccb098b	Fixed in 3cf372cec7ab2cd8c6002bf775cc14d90ccb098b
LinuxLinux	Affected ≥ 377f9b2f4529e0ac702fd7b91e216afd0adc959e, < 1f6a14c142fee4778c32709d1d54595c2e2b7991	Fixed in 1f6a14c142fee4778c32709d1d54595c2e2b7991
LinuxLinux	Affected =2.6.25	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject connection when transport allocation fails handle_connect_req() returns without action when svc_rdma_create_xprt() fails to allocate the new transport. The CM core returns 0 for CONNECT_REQUEST events, so it does not destroy the new rdma_cm_id. Each allocation failure under memory pressure leaks one rdma_cm_id, and a remote peer driving connection attempts can amplify this. Reject the connection by returning a non-zero status from the CM event handler, which tells the CM core to destroy the orphaned cm_id.

References

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