{"id":"CVE-2026-80639","state":"PUBLISHED","title":"cxl/test: Fix __fortify_panic","description":"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. ]","publishedAt":"2026-08-28T06:48:52.045Z","updatedAt":"2026-08-28T06:48:52.045Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06377c54a133621d61fa76cdcea85077c5b958f4","status":"affected","lessThan":"8c4f27a7f364eab514d2fa55c11f39d505122f1b","versionType":"git"},{"version":"06377c54a133621d61fa76cdcea85077c5b958f4","status":"affected","lessThan":"08326b92c7a414a73b5b308d1daf0e91e0134dfc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/testing/cxl/test/cxl_translate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/testing/cxl/test/cxl_translate.c"]}],"references":["https://git.kernel.org/stable/c/8c4f27a7f364eab514d2fa55c11f39d505122f1b","https://git.kernel.org/stable/c/08326b92c7a414a73b5b308d1daf0e91e0134dfc"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80639.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80639","state":"PUBLISHED","datePublished":"2026-08-28T06:48:52.045Z","dateUpdated":"2026-08-28T06:48:52.045Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.777Z"},"containers":{"cna":{"title":"cxl/test: Fix __fortify_panic","descriptions":[{"lang":"en","value":"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. ]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06377c54a133621d61fa76cdcea85077c5b958f4","status":"affected","lessThan":"8c4f27a7f364eab514d2fa55c11f39d505122f1b","versionType":"git"},{"version":"06377c54a133621d61fa76cdcea85077c5b958f4","status":"affected","lessThan":"08326b92c7a414a73b5b308d1daf0e91e0134dfc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/testing/cxl/test/cxl_translate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/testing/cxl/test/cxl_translate.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8c4f27a7f364eab514d2fa55c11f39d505122f1b"},{"url":"https://git.kernel.org/stable/c/08326b92c7a414a73b5b308d1daf0e91e0134dfc"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:48:52.045Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}