{"id":"CVE-2026-98248","summary":"arm64: percpu: Fix LSE operations on {8,16}-bit types","details":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: percpu: Fix LSE operations on {8,16}-bit types\n\nThe assembly for __percpu_##name##_case_##sz() and\n__percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro\nargument to form the LSE instruction. Without 'sfx', a W register\nargument will imply a 32-bit memory location, and consequently\n{8,16}-bit ops will erroneously read and write 32 bits of memory when\nthe LSE instruction is used.\n\nFix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not\nnecessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is\na register-register operation which does not access memory (and does not\ntake a size suffix).","modified":"2026-10-07T02:47:30.031160829Z","published":"2026-10-06T08:45:16.693Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98248.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/390742871a723b52de9b92a94c0d1c85a2531e3e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8cf2093f5372952a9ebc805c418d45df7112cd14"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d69ab4480e49bf925f4781afcc9f284affcb96b6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98248.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98248"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"959bf2fd03b59fc107584c21425f3dc73c49f762"},{"fixed":"d69ab4480e49bf925f4781afcc9f284affcb96b6"},{"fixed":"390742871a723b52de9b92a94c0d1c85a2531e3e"},{"fixed":"843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003"},{"fixed":"8cf2093f5372952a9ebc805c418d45df7112cd14"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98248.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98248.json"}}],"schema_version":"1.9.0"}