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CVE-2026-89582: bnx2x: fix double free in bnx2x_init_firmware() error path

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

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.

Affected products

• Linux kernel: 2.6.31 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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