{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40245","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.181Z","datePublished":"2025-12-04T15:31:34.142Z","dateUpdated":"2026-05-11T21:45:35.997Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:45:35.997Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnios2: ensure that memblock.current_limit is set when setting pfn limits\n\nOn nios2, with CONFIG_FLATMEM set, the kernel relies on\nmemblock_get_current_limit() to determine the limits of mem_map, in\nparticular for max_low_pfn.\nUnfortunately, memblock.current_limit is only default initialized to\nMEMBLOCK_ALLOC_ANYWHERE at this point of the bootup, potentially leading\nto situations where max_low_pfn can erroneously exceed the value of\nmax_pfn and, thus, the valid range of available DRAM.\n\nThis can in turn cause kernel-level paging failures, e.g.:\n\n[   76.900000] Unable to handle kernel paging request at virtual address 20303000\n[   76.900000] ea = c0080890, ra = c000462c, cause = 14\n[   76.900000] Kernel panic - not syncing: Oops\n[   76.900000] ---[ end Kernel panic - not syncing: Oops ]---\n\nThis patch fixes this by pre-calculating memblock.current_limit\nbased on the upper limits of the available memory ranges via\nadjust_lowmem_bounds, a simplified version of the equivalent\nimplementation within the arm architecture."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/nios2/kernel/setup.c"],"versions":[{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"25f09699edd360b534ccae16bc276c3b52c471f3","status":"affected","versionType":"git"},{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"5c3e38a367822f036227dd52bac82dc4a05157e2","status":"affected","versionType":"git"},{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"b1ec9faef7e36269ca3ec890972a78effbaeb975","status":"affected","versionType":"git"},{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"90f5f715550e07cd6a51f80fc3f062d832c8c997","status":"affected","versionType":"git"},{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"8912814f14e298b83df072fecc1f7ed1b63b1b2c","status":"affected","versionType":"git"},{"version":"7f7bc20bc41a4fbcd2db75b375ac95e5faf958ae","lessThan":"a20b83cf45be2057f3d073506779e52c7fa17f94","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/nios2/kernel/setup.c"],"versions":[{"version":"5.12","status":"affected"},{"version":"0","lessThan":"5.12","status":"unaffected","versionType":"semver"},{"version":"5.15.196","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.158","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.115","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.56","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.6","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.6.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.12.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.17.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/25f09699edd360b534ccae16bc276c3b52c471f3"},{"url":"https://git.kernel.org/stable/c/5c3e38a367822f036227dd52bac82dc4a05157e2"},{"url":"https://git.kernel.org/stable/c/b1ec9faef7e36269ca3ec890972a78effbaeb975"},{"url":"https://git.kernel.org/stable/c/90f5f715550e07cd6a51f80fc3f062d832c8c997"},{"url":"https://git.kernel.org/stable/c/8912814f14e298b83df072fecc1f7ed1b63b1b2c"},{"url":"https://git.kernel.org/stable/c/a20b83cf45be2057f3d073506779e52c7fa17f94"}],"title":"nios2: ensure that memblock.current_limit is set when setting pfn limits","x_generator":{"engine":"bippy-1.2.0"}}}}