{"id":"CVE-2024-50199","state":"PUBLISHED","title":"mm/swapfile: skip HugeTLB pages for unuse_vma","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swapfile: skip HugeTLB pages for unuse_vma\n\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff.  The\nproblem can be reproduced by the following steps:\n\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\n 2. Swapout the above anonymous memory.\n 3. run swapoff and we will get a bad pud error in kernel message:\n\n  mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\n\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\nunuse_pud_range() by ftrace.  And therefore the HugeTLB pages will never\nbe freed because we lost it from page table.  We can skip HugeTLB pages\nfor unuse_vma to fix it.","publishedAt":"2024-11-08T05:54:13.403Z","updatedAt":"2026-05-11T20:47:20.650Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"ba7f982cdb37ff5a7739dec85d7325ea66fc1496","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"417d5838ca73c6331ae2fe692fab6c25c00d9a0b","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"e41710f5a61aca9d6baaa8f53908a927dd9e7aa7","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"bed2b9037806c62166a0ef9a559a1e7e3e1275b8","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"7528c4fb1237512ee18049f852f014eba80bbe8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.36","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.36","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.228","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.169","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.114","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.58","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.5","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]}],"references":["https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496","https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b","https://git.kernel.org/stable/c/e41710f5a61aca9d6baaa8f53908a927dd9e7aa7","https://git.kernel.org/stable/c/6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf","https://git.kernel.org/stable/c/bed2b9037806c62166a0ef9a559a1e7e3e1275b8","https://git.kernel.org/stable/c/eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87","https://git.kernel.org/stable/c/7528c4fb1237512ee18049f852f014eba80bbe8d","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/50xxx/CVE-2024-50199.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50199","state":"PUBLISHED","datePublished":"2024-11-08T05:54:13.403Z","dateUpdated":"2026-05-11T20:47:20.650Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T19:36:19.969Z"},"containers":{"cna":{"title":"mm/swapfile: skip HugeTLB pages for unuse_vma","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swapfile: skip HugeTLB pages for unuse_vma\n\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff.  The\nproblem can be reproduced by the following steps:\n\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\n 2. Swapout the above anonymous memory.\n 3. run swapoff and we will get a bad pud error in kernel message:\n\n  mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\n\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\nunuse_pud_range() by ftrace.  And therefore the HugeTLB pages will never\nbe freed because we lost it from page table.  We can skip HugeTLB pages\nfor unuse_vma to fix it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"ba7f982cdb37ff5a7739dec85d7325ea66fc1496","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"417d5838ca73c6331ae2fe692fab6c25c00d9a0b","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"e41710f5a61aca9d6baaa8f53908a927dd9e7aa7","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"bed2b9037806c62166a0ef9a559a1e7e3e1275b8","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87","versionType":"git"},{"version":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f","status":"affected","lessThan":"7528c4fb1237512ee18049f852f014eba80bbe8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.36","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.36","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.228","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.169","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.114","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.58","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.5","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496"},{"url":"https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b"},{"url":"https://git.kernel.org/stable/c/e41710f5a61aca9d6baaa8f53908a927dd9e7aa7"},{"url":"https://git.kernel.org/stable/c/6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf"},{"url":"https://git.kernel.org/stable/c/bed2b9037806c62166a0ef9a559a1e7e3e1275b8"},{"url":"https://git.kernel.org/stable/c/eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87"},{"url":"https://git.kernel.org/stable/c/7528c4fb1237512ee18049f852f014eba80bbe8d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:47:20.650Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"5.4.285"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"5.10.228"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"5.15.169"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.1.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.6.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.11.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.36","versionEndExcluding":"6.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T22:26:54.906Z"}}]}}}