VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93151: Linux kernel · nvmet-rdma: fix response resource leak on queue teardown

Affects Linux kernelSource CVE Database V5

Not known to be exploited · CVSS 7.5 High · fixed in d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50 : patch Linux kernel soon.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50, ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c, 9584b3c30e4ee8ca315bdc12249cc6c47cf1a482 +4

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 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 ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50	Fixed in d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50
LinuxLinux	Affected ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c	Fixed in ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c
LinuxLinux	Affected ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < 9584b3c30e4ee8ca315bdc12249cc6c47cf1a482	Fixed in 9584b3c30e4ee8ca315bdc12249cc6c47cf1a482
LinuxLinux	Affected ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < 156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7	Fixed in 156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7
LinuxLinux	Affected ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < 0114dd303b373522dea06053aabae34bdd33a7c4	Fixed in 0114dd303b373522dea06053aabae34bdd33a7c4
LinuxLinux	Affected ≥ 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b, < 91cfa74f1f3772e8c3662c064a45d8633e00c78e	Fixed in 91cfa74f1f3772e8c3662c064a45d8633e00c78e

AI-suggested

A fix is available and has been applied in multiple Linux kernel commits. Users should update to a fixed Linux kernel version that includes the patches identified by the commit hashes provided. No additional mitigation actions are required beyond applying the official fix.

Description

CVE-2026-93151 is a high-severity vulnerability in the Linux kernel's nvmet-rdma subsystem. It causes a resource leak when an NVMe target using RDMA transport is removed while I/O operations are still in flight. Specifically, response resources such as RDMA read/write contexts and request scatter-gather lists are not freed due to missing send completion callbacks, leading to memory leaks. This issue has been fixed in several Linux kernel commits.

Impact

The vulnerability leads to a memory leak in the Linux kernel when NVMe over RDMA targets are removed with in-flight I/O operations. This can degrade system stability and availability due to resource exhaustion over time. There is no direct impact on confidentiality or integrity reported. No known exploits in the wild have been documented.

Summary

The vulnerability occurs in the Linux kernel's nvmet-rdma driver where, if an NVMe target with RDMA transport is removed during active I/O, the response send completion is never delivered before connection teardown. Consequently, the functions nvmet_rdma_send_done() and nvmet_rdma_release_rsp() are not called, causing leaks of allocated RDMA read/write contexts and request SGLs. Kernel kmemleak reports confirm these leaks during testing with the rdma transport and siw driver. The fix involves reclaiming memory of in-flight responses on queue QP teardown by calling nvmet_rdma_free_rsp_resources(), which frees the leaked resources. The vulnerability is tracked as CVE-2026-93151 and has a CVSS 3.1 base score of 7.5 (high severity).

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 11:04 UTC

Technical details

References

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