{"id":"CVE-2026-98638","published":"2026-10-18T16:17:16.920","lastModified":"2026-10-19T10:19:28.037","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Validate the SVE vector length in pkvm_vcpu_init_sve()\n\npkvm_vcpu_init_sve() clamps only the upper bound of the host-provided\nsve_max_vl, so an invalid vector length reaches sve_state_size_from_vl()\nand the WARN_ON() there, which is fatal at EL2. The existing\n!sve_state_size test rejects such a length, but only after the macro has\nrun.\n\nCheck sve_vl_valid() before deriving the state size. A valid length\ncannot yield a zero size, so the !sve_state_size test goes with it.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2a2eb10795a1e495aebc7f829ccecb72c05b4fd9","tags":[]},{"url":"https://git.kernel.org/stable/c/bae3e4493046de4fefa15f809d9b8dc114e84a3d","tags":[]},{"url":"https://git.kernel.org/stable/c/faf66e55e87498ab4bf88cdf9a629e61b3f2d3bc","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}