SB2026101598 - Use-after-free in Linux kernel hw efa driver
Published: October 15, 2026
Security Bulletin ID
SB2026101598
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98429)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free and access to uninitialized state in the EFA RDMA driver's completion interrupt handler when event queues are initialized or destroyed. A local user can trigger interrupt handling that accesses event queue state or a DMA buffer outside its valid lifetime to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/38871ff47e2a02f8d9a333a65f358d987247b5b0
- https://git.kernel.org/stable/c/3cd652dfcd822af26ba75d6d2d245ea7f73b499e
- https://git.kernel.org/stable/c/795eb34bfd8b1ab347adc41a11e4bb97c3ac0ce6
- https://git.kernel.org/stable/c/9ecd3dcbdf1f315aadc049b291f59c79dc478062
- https://git.kernel.org/stable/c/c767e2812cac83fef70fb8932c3f0fe97dff9388
- https://git.kernel.org/stable/c/e22a3627b7151754f07f90ea3d1ab6e85f5d93f4