{"id":"CVE-2024-26850","state":"PUBLISHED","title":"mm/debug_vm_pgtable: fix BUG_ON with pud advanced test","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/debug_vm_pgtable: fix BUG_ON with pud advanced test\n\nArchitectures like powerpc add debug checks to ensure we find only devmap\nPUD pte entries.  These debug checks are only done with CONFIG_DEBUG_VM. \nThis patch marks the ptes used for PUD advanced test devmap pte entries so\nthat we don't hit on debug checks on architecture like ppc64 as below.\n\nWARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138\n....\nNIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138\nLR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60\nCall Trace:\n[c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable)\n[c000000004a2f980] [000d34c100000000] 0xd34c100000000\n[c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334\n[c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48\n[c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388\n\nAlso\n\n kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202!\n ....\n\n NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174\n LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334\n Call Trace:\n [c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable)\n [c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334\n [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48\n [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388","publishedAt":"2024-04-17T10:14:20.812Z","updatedAt":"2026-05-11T20:05:19.994Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"d2a9510c0e39d06f5544075c13040407bdbf2803","versionType":"git"},{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"eeeddf85fc58d48c58ad916e4ca12363ebd8ab21","versionType":"git"},{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"720da1e593b85a550593b415bf1d79a053133451","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/debug_vm_pgtable.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.21","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.9","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/debug_vm_pgtable.c"]}],"references":["https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803","https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21","https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/26xxx/CVE-2024-26850.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-26850","state":"PUBLISHED","datePublished":"2024-04-17T10:14:20.812Z","dateUpdated":"2026-05-11T20:05:19.994Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-19T14:20:24.183Z"},"containers":{"cna":{"title":"mm/debug_vm_pgtable: fix BUG_ON with pud advanced test","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/debug_vm_pgtable: fix BUG_ON with pud advanced test\n\nArchitectures like powerpc add debug checks to ensure we find only devmap\nPUD pte entries.  These debug checks are only done with CONFIG_DEBUG_VM. \nThis patch marks the ptes used for PUD advanced test devmap pte entries so\nthat we don't hit on debug checks on architecture like ppc64 as below.\n\nWARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138\n....\nNIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138\nLR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60\nCall Trace:\n[c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable)\n[c000000004a2f980] [000d34c100000000] 0xd34c100000000\n[c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334\n[c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48\n[c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388\n\nAlso\n\n kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202!\n ....\n\n NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174\n LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334\n Call Trace:\n [c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable)\n [c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334\n [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48\n [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"d2a9510c0e39d06f5544075c13040407bdbf2803","versionType":"git"},{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"eeeddf85fc58d48c58ad916e4ca12363ebd8ab21","versionType":"git"},{"version":"27af67f35631ac4b61b5e4455b44c9aee8d2cc4b","status":"affected","lessThan":"720da1e593b85a550593b415bf1d79a053133451","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/debug_vm_pgtable.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.21","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.9","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/debug_vm_pgtable.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803"},{"url":"https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21"},{"url":"https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:05:19.994Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.7.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T00:14:13.701Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-26850","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:48:41.728236Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:33:27.633Z"}}]}}}