{"id":"CVE-2026-80639","summary":"cxl/test: Fix __fortify_panic","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/test: Fix __fortify_panic\n\nFix a runtime assertion in setup_xor_mapping(). Fortify complains that it\nis potentially overflowing the xormaps array per __counted_by(nr_maps).\nQuiet the false positive by initializing @nr_maps earlier.\n\n memcpy: detected buffer overflow: 32 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#8: modprobe/2728\n Call Trace:\n  __fortify_panic+0xd/0xf\n  setup_xor_mapping+0x6c/0xa0 [cxl_translate]\n\n[ dj: Fixed up @nr_entries to @nr_maps in commit log. ]","modified":"2026-08-29T03:47:17.026240118Z","published":"2026-08-28T06:48:52.045Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80639.json","cna_assigner":"Linux"},"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/08326b92c7a414a73b5b308d1daf0e91e0134dfc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c4f27a7f364eab514d2fa55c11f39d505122f1b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80639.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80639"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"06377c54a133621d61fa76cdcea85077c5b958f4"},{"fixed":"8c4f27a7f364eab514d2fa55c11f39d505122f1b"},{"fixed":"08326b92c7a414a73b5b308d1daf0e91e0134dfc"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80639.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80639.json"}}],"schema_version":"1.9.0"}