{"id":"CVE-2022-49395","state":"PUBLISHED","title":"um: Fix out-of-bounds read in LDT setup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\num: Fix out-of-bounds read in LDT setup\n\nsyscall_stub_data() expects the data_count parameter to be the number of\nlongs, not bytes.\n\n ==================================================================\n BUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0\n Read of size 128 at addr 000000006411f6f0 by task swapper/1\n\n CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18\n Call Trace:\n  show_stack.cold+0x166/0x2a7\n  __dump_stack+0x3a/0x43\n  dump_stack_lvl+0x1f/0x27\n  print_report.cold+0xdb/0xf81\n  kasan_report+0x119/0x1f0\n  kasan_check_range+0x3a3/0x440\n  memcpy+0x52/0x140\n  syscall_stub_data+0x70/0xe0\n  write_ldt_entry+0xac/0x190\n  init_new_ldt+0x515/0x960\n  init_new_context+0x2c4/0x4d0\n  mm_init.constprop.0+0x5ed/0x760\n  mm_alloc+0x118/0x170\n  0x60033f48\n  do_one_initcall+0x1d7/0x860\n  0x60003e7b\n  kernel_init+0x6e/0x3d4\n  new_thread_handler+0x1e7/0x2c0\n\n The buggy address belongs to stack of task swapper/1\n  and is located at offset 64 in frame:\n  init_new_ldt+0x0/0x960\n\n This frame has 2 objects:\n  [32, 40) 'addr'\n  [64, 80) 'desc'\n ==================================================================","publishedAt":"2025-02-26T02:11:25.676Z","updatedAt":"2026-05-11T18:58:55.326Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"668ca34a428d6ffc0f99a1a6a9b661a288d4183b","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"ef1dc929a1e5fa1b2d842256db9fb8710d3be910","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"3549ab4b962cf619e8c55484a0d870a34b3f845f","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"9caad70819aef3431abaf73ba5163b55b161aba0","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"cf0dabc37446c5ee538ae7b4c467ab0e53fa5463","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"10995a382271254bd276627ec74136da4a23c4a6","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"24ca648bf5f72ed8878cf09b5d4431935779681e","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"91e5ba2af2d729d5126aefd5aa3eadc69b8426e5","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"2a4a62a14be1947fa945c5c11ebf67326381a568","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/um/ldt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.121","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.46","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/um/ldt.c"]}],"references":["https://git.kernel.org/stable/c/668ca34a428d6ffc0f99a1a6a9b661a288d4183b","https://git.kernel.org/stable/c/ef1dc929a1e5fa1b2d842256db9fb8710d3be910","https://git.kernel.org/stable/c/3549ab4b962cf619e8c55484a0d870a34b3f845f","https://git.kernel.org/stable/c/9caad70819aef3431abaf73ba5163b55b161aba0","https://git.kernel.org/stable/c/cf0dabc37446c5ee538ae7b4c467ab0e53fa5463","https://git.kernel.org/stable/c/10995a382271254bd276627ec74136da4a23c4a6","https://git.kernel.org/stable/c/24ca648bf5f72ed8878cf09b5d4431935779681e","https://git.kernel.org/stable/c/91e5ba2af2d729d5126aefd5aa3eadc69b8426e5","https://git.kernel.org/stable/c/2a4a62a14be1947fa945c5c11ebf67326381a568"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49395.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49395","state":"PUBLISHED","datePublished":"2025-02-26T02:11:25.676Z","dateUpdated":"2026-05-11T18:58:55.326Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.562Z"},"containers":{"cna":{"title":"um: Fix out-of-bounds read in LDT setup","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\num: Fix out-of-bounds read in LDT setup\n\nsyscall_stub_data() expects the data_count parameter to be the number of\nlongs, not bytes.\n\n ==================================================================\n BUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0\n Read of size 128 at addr 000000006411f6f0 by task swapper/1\n\n CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18\n Call Trace:\n  show_stack.cold+0x166/0x2a7\n  __dump_stack+0x3a/0x43\n  dump_stack_lvl+0x1f/0x27\n  print_report.cold+0xdb/0xf81\n  kasan_report+0x119/0x1f0\n  kasan_check_range+0x3a3/0x440\n  memcpy+0x52/0x140\n  syscall_stub_data+0x70/0xe0\n  write_ldt_entry+0xac/0x190\n  init_new_ldt+0x515/0x960\n  init_new_context+0x2c4/0x4d0\n  mm_init.constprop.0+0x5ed/0x760\n  mm_alloc+0x118/0x170\n  0x60033f48\n  do_one_initcall+0x1d7/0x860\n  0x60003e7b\n  kernel_init+0x6e/0x3d4\n  new_thread_handler+0x1e7/0x2c0\n\n The buggy address belongs to stack of task swapper/1\n  and is located at offset 64 in frame:\n  init_new_ldt+0x0/0x960\n\n This frame has 2 objects:\n  [32, 40) 'addr'\n  [64, 80) 'desc'\n =================================================================="}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"668ca34a428d6ffc0f99a1a6a9b661a288d4183b","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"ef1dc929a1e5fa1b2d842256db9fb8710d3be910","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"3549ab4b962cf619e8c55484a0d870a34b3f845f","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"9caad70819aef3431abaf73ba5163b55b161aba0","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"cf0dabc37446c5ee538ae7b4c467ab0e53fa5463","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"10995a382271254bd276627ec74136da4a23c4a6","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"24ca648bf5f72ed8878cf09b5d4431935779681e","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"91e5ba2af2d729d5126aefd5aa3eadc69b8426e5","versionType":"git"},{"version":"858259cf7d1c443c836a2022b78cb281f0a9b95e","status":"affected","lessThan":"2a4a62a14be1947fa945c5c11ebf67326381a568","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/um/ldt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.121","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.46","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/um/ldt.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/668ca34a428d6ffc0f99a1a6a9b661a288d4183b"},{"url":"https://git.kernel.org/stable/c/ef1dc929a1e5fa1b2d842256db9fb8710d3be910"},{"url":"https://git.kernel.org/stable/c/3549ab4b962cf619e8c55484a0d870a34b3f845f"},{"url":"https://git.kernel.org/stable/c/9caad70819aef3431abaf73ba5163b55b161aba0"},{"url":"https://git.kernel.org/stable/c/cf0dabc37446c5ee538ae7b4c467ab0e53fa5463"},{"url":"https://git.kernel.org/stable/c/10995a382271254bd276627ec74136da4a23c4a6"},{"url":"https://git.kernel.org/stable/c/24ca648bf5f72ed8878cf09b5d4431935779681e"},{"url":"https://git.kernel.org/stable/c/91e5ba2af2d729d5126aefd5aa3eadc69b8426e5"},{"url":"https://git.kernel.org/stable/c/2a4a62a14be1947fa945c5c11ebf67326381a568"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:58:55.326Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"4.9.318"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"4.14.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"4.19.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.4.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.10.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.15.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.1,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49395","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:41:28.052131Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:46:50.853Z"}}]}}}