{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48731","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-06-20T11:09:39.053Z","datePublished":"2024-06-20T11:13:19.407Z","dateUpdated":"2025-12-23T13:20:06.320Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-23T13:20:06.320Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: avoid scanning potential huge holes\n\nWhen using devm_request_free_mem_region() and devm_memremap_pages() to\nadd ZONE_DEVICE memory, if requested free mem region's end pfn were\nhuge(e.g., 0x400000000), the node_end_pfn() will be also huge (see\nmove_pfn_range_to_zone()).  Thus it creates a huge hole between\nnode_start_pfn() and node_end_pfn().\n\nWe found on some AMD APUs, amdkfd requested such a free mem region and\ncreated a huge hole.  In such a case, following code snippet was just\ndoing busy test_bit() looping on the huge hole.\n\n  for (pfn = start_pfn; pfn < end_pfn; pfn++) {\n\tstruct page *page = pfn_to_online_page(pfn);\n\t\tif (!page)\n\t\t\tcontinue;\n\t...\n  }\n\nSo we got a soft lockup:\n\n  watchdog: BUG: soft lockup - CPU#6 stuck for 26s! [bash:1221]\n  CPU: 6 PID: 1221 Comm: bash Not tainted 5.15.0-custom #1\n  RIP: 0010:pfn_to_online_page+0x5/0xd0\n  Call Trace:\n    ? kmemleak_scan+0x16a/0x440\n    kmemleak_write+0x306/0x3a0\n    ? common_file_perm+0x72/0x170\n    full_proxy_write+0x5c/0x90\n    vfs_write+0xb9/0x260\n    ksys_write+0x67/0xe0\n    __x64_sys_write+0x1a/0x20\n    do_syscall_64+0x3b/0xc0\n    entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nI did some tests with the patch.\n\n(1) amdgpu module unloaded\n\nbefore the patch:\n\n  real    0m0.976s\n  user    0m0.000s\n  sys     0m0.968s\n\nafter the patch:\n\n  real    0m0.981s\n  user    0m0.000s\n  sys     0m0.973s\n\n(2) amdgpu module loaded\n\nbefore the patch:\n\n  real    0m35.365s\n  user    0m0.000s\n  sys     0m35.354s\n\nafter the patch:\n\n  real    0m1.049s\n  user    0m0.000s\n  sys     0m1.042s"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/kmemleak.c"],"versions":[{"version":"4ef589dc9b10cdcae75a2b2b0e9b2c5e8a92c378","lessThan":"d3533ee20e9a0e2e8f60384da7450d43d1c63d1a","status":"affected","versionType":"git"},{"version":"4ef589dc9b10cdcae75a2b2b0e9b2c5e8a92c378","lessThan":"352715593e81b917ce1b321e794549815b850134","status":"affected","versionType":"git"},{"version":"4ef589dc9b10cdcae75a2b2b0e9b2c5e8a92c378","lessThan":"a5389c80992f0001ee505838fe6a8b20897ce96e","status":"affected","versionType":"git"},{"version":"4ef589dc9b10cdcae75a2b2b0e9b2c5e8a92c378","lessThan":"cebb0aceb21ad91429617a40e3a17444fabf1529","status":"affected","versionType":"git"},{"version":"4ef589dc9b10cdcae75a2b2b0e9b2c5e8a92c378","lessThan":"c10a0f877fe007021d70f9cada240f42adc2b5db","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/kmemleak.c"],"versions":[{"version":"4.14","status":"affected"},{"version":"0","lessThan":"4.14","status":"unaffected","versionType":"semver"},{"version":"5.4.178","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.99","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.22","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16.8","lessThanOrEqual":"5.16.*","status":"unaffected","versionType":"semver"},{"version":"5.17","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":"4.14","versionEndExcluding":"5.4.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.99"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.16.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d3533ee20e9a0e2e8f60384da7450d43d1c63d1a"},{"url":"https://git.kernel.org/stable/c/352715593e81b917ce1b321e794549815b850134"},{"url":"https://git.kernel.org/stable/c/a5389c80992f0001ee505838fe6a8b20897ce96e"},{"url":"https://git.kernel.org/stable/c/cebb0aceb21ad91429617a40e3a17444fabf1529"},{"url":"https://git.kernel.org/stable/c/c10a0f877fe007021d70f9cada240f42adc2b5db"}],"title":"mm/kmemleak: avoid scanning potential huge holes","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-06-20T13:35:34.134503Z","id":"CVE-2022-48731","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-10-29T18:12:10.030Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T15:25:01.574Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/d3533ee20e9a0e2e8f60384da7450d43d1c63d1a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/352715593e81b917ce1b321e794549815b850134","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/a5389c80992f0001ee505838fe6a8b20897ce96e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cebb0aceb21ad91429617a40e3a17444fabf1529","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c10a0f877fe007021d70f9cada240f42adc2b5db","tags":["x_transferred"]}]}]}}