CVE-2026-98638: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Validate the SVE vector length in pkvm_vcpu_init_sve() pkvm_vcpu_init_sve() clamps only the upper bound of the host-provided sve_max_vl, so an invalid vector length reaches sve_state_size_from_vl() and the WARN_ON() there, which is fatal at EL2. The existing !sve_state_size test rejects such a length, but only after the macro has run. Check sve_vl_valid() before deriving the state size. A valid length cannot yield a zero size, so the !sve_state_size test goes with it.

Засегнати продукти

• Linux Linux: 5db1bef933427aa467ad89c7b695a84a6b4afe16 преди faf66e55e87498ab4bf88cdf9a629e61b3f2d3bc; 5db1bef933427aa467ad89c7b695a84a6b4afe16 преди bae3e4493046de4fefa15f809d9b8dc114e84a3d; 5db1bef933427aa467ad89c7b695a84a6b4afe16 преди 2a2eb10795a1e495aebc7f829ccecb72c05b4fd9
• Linux Linux: 6.16; преди 6.16; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-98638
• https://nvd.nist.gov/vuln/detail/CVE-2026-98638
• https://git.kernel.org/stable/c/faf66e55e87498ab4bf88cdf9a629e61b3f2d3bc
• https://git.kernel.org/stable/c/bae3e4493046de4fefa15f809d9b8dc114e84a3d
• https://git.kernel.org/stable/c/2a2eb10795a1e495aebc7f829ccecb72c05b4fd9