What’s Vulnerable › Vulnerabilities

CVE-2026-74693: net: prestera: validate firmware header length

• 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: 2026-08-22 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: net: prestera: validate firmware header length prestera_fw_hdr_parse() reads the firmware header before checking that the firmware image contains that header. Reject images shorter than struct prestera_fw_header before decoding the magic and version fields.

Affected products

• Linux kernel: 5.10 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fbcceb9d19f2d1dcdf099aee590f2517cb718bb
• https://git.kernel.org/stable/c/363e048a9d0a6c245cbc348c8a220170afed046a
• https://git.kernel.org/stable/c/38a3afbf9fd8a2e8c47fa3ca47b425a8a9623240
• https://git.kernel.org/stable/c/470ac9cce7308e60cf2dceb448749cdd006e73de
• https://git.kernel.org/stable/c/6fad06bb793d7089ae05b9fcf46e11be2dfe4850
• https://git.kernel.org/stable/c/7fa8a12296d8d5aa4b1c3904f0b354d81124cf29
• https://git.kernel.org/stable/c/8ae344eb540af3f457179b52bc6061416752485c
• https://git.kernel.org/stable/c/e0f382e8084117f0b11ffb070fe1079e38c0d7f9

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