Linux Kernel up to 7.2.5 RDMA/siw siw_accept use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 7.2.5 and classified as very critical. This affects the function siw_accept of the component RDMA/siw. Performing a manipulation results in use after free. This vulnerability is known as CVE-2026-90292. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.2.5. It has been classified as very critical. This affects the function siw_accept of the component RDMA/siw. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix use-after-free in siw_accept() siw_accept() looks up the QP supplied by userspace. If that QP is already in RTS, the function jumps to error cleanup before associating the incoming CEP with it. The cleanup tests whether qp->cep is non-NULL and assumes the current call installed the association. However, qp->cep can point to the CEP of an existing connection. The cleanup then drops a reference from the incoming cep, not qp->cep. Once the incoming endpoint loses its remaining references, this can free it before the subsequent cep->qp store, causing a use-after-free. It also clears the existing QP association. Only release the association reference when qp->cep is the incoming CEP. This preserves an existing association and avoids accessing the freed endpoint.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-90292 since 09/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/17/2026).

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch d57db36e74cca4763e1c2c0c6eb9f84d19813879/59de5502f32895ffe9c45530327ed997b90fdf06/a89d120615e711ce8fce551fd291c2f387666735/b9e7d3d9fdb2bfcfb25d93529fdf766536b37c78/8f286a8094ee32c415f9ecd2c20765beb8a18c79/de603f01d9ccf823e575b013ffd86ebedca9a8c5/561651d6a15588cee2040755f253faca2463415c/a9394971825933074032794a5feee5211509c774 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: d57db36e74cca4763e1c2c0c6eb9f84d19813879/59de5502f32895ffe9c45530327ed997b90fdf06/a89d120615e711ce8fce551fd291c2f387666735/b9e7d3d9fdb2bfcfb25d93529fdf766536b37c78/8f286a8094ee32c415f9ecd2c20765beb8a18c79/de603f01d9ccf823e575b013ffd86ebedca9a8c5/561651d6a15588cee2040755f253faca2463415c/a9394971825933074032794a5feee5211509c774

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90292 (🔒)
GCVE (CVE): GCVE-0-2026-90292
GCVE (VulDB): GCVE-100-406815

Entryinfo

Created: 09/17/2026 21:20
Changes: 09/17/2026 21:20 (59)
Complete: 🔍
Cache ID: 216::103

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