{"id":"CVE-2022-50657","state":"PUBLISHED","title":"riscv: mm: add missing memcpy in kasan_init","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: add missing memcpy in kasan_init\n\nHi Atish,\n\nIt seems that the panic is due to the missing memcpy during kasan_init.\nCould you please check whether this patch is helpful?\n\nWhen doing kasan_populate, the new allocated base_pud/base_p4d should\ncontain kasan_early_shadow_{pud, p4d}'s content. Add the missing memcpy\nto avoid page fault when read/write kasan shadow region.\n\nTested on:\n - qemu with sv57 and CONFIG_KASAN on.\n - qemu with sv48 and CONFIG_KASAN on.","publishedAt":"2025-12-09T01:29:04.968Z","updatedAt":"2026-05-11T19:23:06.462Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8fbdccd2b17335e1881a23865e98c63fcc345938","status":"affected","lessThan":"ff0f6becf3a6f817838b6f80a2c9cca43dce0576","versionType":"git"},{"version":"8fbdccd2b17335e1881a23865e98c63fcc345938","status":"affected","lessThan":"9f2ac64d6ca60db99132e08628ac2899f956a0ec","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/mm/kasan_init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.0.7","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/mm/kasan_init.c"]}],"references":["https://git.kernel.org/stable/c/ff0f6becf3a6f817838b6f80a2c9cca43dce0576","https://git.kernel.org/stable/c/9f2ac64d6ca60db99132e08628ac2899f956a0ec"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50657.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50657","state":"PUBLISHED","datePublished":"2025-12-09T01:29:04.968Z","dateUpdated":"2026-05-11T19:23:06.462Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-09T01:26:45.989Z"},"containers":{"cna":{"title":"riscv: mm: add missing memcpy in kasan_init","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: add missing memcpy in kasan_init\n\nHi Atish,\n\nIt seems that the panic is due to the missing memcpy during kasan_init.\nCould you please check whether this patch is helpful?\n\nWhen doing kasan_populate, the new allocated base_pud/base_p4d should\ncontain kasan_early_shadow_{pud, p4d}'s content. Add the missing memcpy\nto avoid page fault when read/write kasan shadow region.\n\nTested on:\n - qemu with sv57 and CONFIG_KASAN on.\n - qemu with sv48 and CONFIG_KASAN on."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8fbdccd2b17335e1881a23865e98c63fcc345938","status":"affected","lessThan":"ff0f6becf3a6f817838b6f80a2c9cca43dce0576","versionType":"git"},{"version":"8fbdccd2b17335e1881a23865e98c63fcc345938","status":"affected","lessThan":"9f2ac64d6ca60db99132e08628ac2899f956a0ec","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/mm/kasan_init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.0.7","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/mm/kasan_init.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ff0f6becf3a6f817838b6f80a2c9cca43dce0576"},{"url":"https://git.kernel.org/stable/c/9f2ac64d6ca60db99132e08628ac2899f956a0ec"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:23:06.462Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}