CVE-2026-43034 bnxt_en: set backing store type from query type

What is CVE-2026-43034?

CVE-2026-43034 is a medium-severity vulnerability in Linux kernel, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

bnxt_en: set backing store type from query type

bnxt_hwrm_func_backing_store_qcaps_v2() stores resp->type from the firmware response in ctxm->type and later uses that value to index fixed backing-store metadata arrays such as ctx_arr[] and bnxt_bstore_to_trace[].

ctxm->type is fixed by the current backing-store query type and matches the array index of ctx->ctx_arr. Set ctxm->type from the current loop variable instead of depending on resp->type.

Also update the loop to advance type from next_valid_type in the for statement, which keeps the control flow simpler for non-valid and unchanged entries.

Which versions are affected by CVE-2026-43034?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43034?

Apply the vendor's patch.

Is CVE-2026-43034 being exploited?

There is no known exploitation of CVE-2026-43034 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-43034, DEBIAN-CVE-2026-43034, GHSA-w54w-gcfv-p884, ROOT-OS-DEBIAN-13-CVE-2026-43034, ROOT-OS-UBUNTU-2404-CVE-2026-43034, UBUNTU-CVE-2026-43034.