What’s Vulnerable › Vulnerabilities

CVE-2026-74352: of: reserved_mem: avoid post-init UAF when alloc_reserved_mem_array() fails

• 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: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: avoid post-init UAF when alloc_reserved_mem_array() fails The global pointer 'reserved_mem' continues to reference the reserved_mem_array which lives in __initdata if alloc_reserved_mem_array() fails. of_reserved_mem_lookup() is exported for post-init use, that would dereference freed memory and trigger a use-after-free. So reset reserved_mem_count to 0 when alloc_reserved_mem_array() fails.

Affected products

• Linux kernel: 6.13 — 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/6d28e6ad3c5c9248577f21057baa9bf16fa9ef3b
• https://git.kernel.org/stable/c/9af58d10d0d8c08b822de5fc99e61f31a87ede8d
• https://git.kernel.org/stable/c/cbd3102fe27bc87da244bf4c3ba670ea4698b0a8
• https://git.kernel.org/stable/c/e1686ca81dbf3edbde589b7daf312b45cbf76e03

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