In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() Sashiko points out… (CVE-2026-46178)
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() Sashiko points out that mlx4_srq_alloc() was not undone during error unwind, add the missing call to mlx4_srq_free().
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's RDMA mlx4 driver involves a resource leak due to missing cleanup of allocated resources when an error occurs in mlx4_ib_create_srq(). Specifically, mlx4_srq_alloc() was not freed during error unwind, which could lead to resource exhaustion. This issue has been resolved by adding the missing call to mlx4_srq_free(). The affected versions include various Ubuntu kernel versions prior to 5.15.0-1112.119~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2, 5.15.0-186.196~20.04.1, and 5.15.0-1106.110~20.04.1.
Potential Impact
The vulnerability can cause resource leaks in the kernel's RDMA mlx4 driver, potentially leading to denial of service or system instability due to resource exhaustion. The CVSS vector indicates high impact on confidentiality, integrity, and availability, but no known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in the specified patched kernel versions. Users should update their Linux kernel to versions equal to or newer than the fixed releases (e.g., >=5.15.0-1112.119~20.04.1 and others as listed). There is no indication that additional mitigations are required beyond applying these updates.
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() Sashiko points out… (CVE-2026-46178)
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq() Sashiko points out that mlx4_srq_alloc() was not undone during error unwind, add the missing call to mlx4_srq_free().
CVSS v3.1
Score 7.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's RDMA mlx4 driver involves a resource leak due to missing cleanup of allocated resources when an error occurs in mlx4_ib_create_srq(). Specifically, mlx4_srq_alloc() was not freed during error unwind, which could lead to resource exhaustion. This issue has been resolved by adding the missing call to mlx4_srq_free(). The affected versions include various Ubuntu kernel versions prior to 5.15.0-1112.119~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2, 5.15.0-186.196~20.04.1, and 5.15.0-1106.110~20.04.1.
Potential Impact
The vulnerability can cause resource leaks in the kernel's RDMA mlx4 driver, potentially leading to denial of service or system instability due to resource exhaustion. The CVSS vector indicates high impact on confidentiality, integrity, and availability, but no known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in the specified patched kernel versions. Users should update their Linux kernel to versions equal to or newer than the fixed releases (e.g., >=5.15.0-1112.119~20.04.1 and others as listed). There is no indication that additional mitigations are required beyond applying these updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-46178
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a01d791ae9bcd3f82c966
Added to database: 07/17/2026, 10:20:07 UTC
Last enriched: 07/30/2026, 14:24:02 UTC
Last updated: 07/31/2026, 21:29:00 UTC
Views: 4
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