{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49395", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.562Z", "datePublished": "2025-02-26T02:11:25.676Z", "dateUpdated": "2025-10-01T19:46:50.853Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:36:46.024Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/um/ldt.c"], "versions": [{"version": 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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "5.19"}]}]}], "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"}], "title": "um: Fix out-of-bounds read in LDT setup", "x_generator": {"engine": 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{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0DED0F6A-FC03-4637-B95D-CCE9C053BD2B", "versionEndExcluding": "4.9.318", "versionStartIncluding": "2.6.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6823775-2653-4644-A0D4-4E6E68F10C65", "versionEndExcluding": "4.14.283", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "34ACD872-E5BC-401C-93D5-B357A62426E0", "versionEndExcluding": "5.10.121", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20D41697-0E8B-4B7D-8842-F17BF2AA21E1", "versionEndExcluding": "5.15.46", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "15E2DD33-2255-4B76-9C15-04FF8CBAB252", "versionEndExcluding": "5.17.14", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2", "versionEndExcluding": "5.18.3", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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 =================================================================="}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: um: Se corrige la lectura fuera de los l\u00edmites en la configuraci\u00f3n de LDT syscall_stub_data() espera que el par\u00e1metro data_count sea el n\u00famero de longs, no bytes. ===================================================================== ERROR: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0 Read of size 128 at addr 000000006411f6f0 by task swapper/1 CPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18 Call Trace: show_stack.cold+0x166/0x2a7 __dump_stack+0x3a/0x43 dump_stack_lvl+0x1f/0x27 print_report.cold+0xdb/0xf81 kasan_report+0x119/0x1f0 kasan_check_range+0x3a3/0x440 memcpy+0x52/0x140 syscall_stub_data+0x70/0xe0 write_ldt_entry+0xac/0x190 init_new_ldt+0x515/0x960 init_new_context+0x2c4/0x4d0 mm_init.constprop.0+0x5ed/0x760 mm_alloc+0x118/0x170 0x60033f48 do_one_initcall+0x1d7/0x860 0x60003e7b kernel_init+0x6e/0x3d4 new_thread_handler+0x1e7/0x2c0 The buggy address belongs to stack of task swapper/1 and is located at offset 64 in frame: init_new_ldt+0x0/0x960 This frame has 2 objects: [32, 40) 'addr' [64, 80) 'desc' =================================================================="}], "id": "CVE-2022-49395", "lastModified": "2025-10-01T20:16:16.973", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-02-26T07:01:16.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/10995a382271254bd276627ec74136da4a23c4a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24ca648bf5f72ed8878cf09b5d4431935779681e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2a4a62a14be1947fa945c5c11ebf67326381a568"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3549ab4b962cf619e8c55484a0d870a34b3f845f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/668ca34a428d6ffc0f99a1a6a9b661a288d4183b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/91e5ba2af2d729d5126aefd5aa3eadc69b8426e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9caad70819aef3431abaf73ba5163b55b161aba0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cf0dabc37446c5ee538ae7b4c467ab0e53fa5463"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef1dc929a1e5fa1b2d842256db9fb8710d3be910"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:8744", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.56.1.rt7.397.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-06-10T00:00:00Z"}, {"advisory": "RHSA-2025:8743", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.56.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-06-10T00:00:00Z"}, {"advisory": "RHSA-2025:10179", "cpe": "cpe:/o:redhat:rhel_aus:8.2", "package": "kernel-0:4.18.0-193.156.1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10211", "cpe": "cpe:/o:redhat:rhel_tus:8.8", "package": "kernel-0:4.18.0-477.100.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10211", "cpe": "cpe:/o:redhat:rhel_e4s:8.8", "package": "kernel-0:4.18.0-477.100.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions", "release_date": "2025-07-02T00:00:00Z"}, {"advisory": "RHSA-2025:10527", "cpe": "cpe:/a:redhat:rhel_e4s:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.125.1.rt14.410.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions", "release_date": "2025-07-07T00:00:00Z"}], "bugzilla": {"description": "kernel: um: Fix out-of-bounds read in LDT setup", "id": "2347899", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347899"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "verified"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\num: Fix out-of-bounds read in LDT setup\nsyscall_stub_data() expects the data_count parameter to be the number of\nlongs, not bytes.\n==================================================================\nBUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0\nRead of size 128 at addr 000000006411f6f0 by task swapper/1\nCPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18\nCall Trace:\nshow_stack.cold+0x166/0x2a7\n__dump_stack+0x3a/0x43\ndump_stack_lvl+0x1f/0x27\nprint_report.cold+0xdb/0xf81\nkasan_report+0x119/0x1f0\nkasan_check_range+0x3a3/0x440\nmemcpy+0x52/0x140\nsyscall_stub_data+0x70/0xe0\nwrite_ldt_entry+0xac/0x190\ninit_new_ldt+0x515/0x960\ninit_new_context+0x2c4/0x4d0\nmm_init.constprop.0+0x5ed/0x760\nmm_alloc+0x118/0x170\n0x60033f48\ndo_one_initcall+0x1d7/0x860\n0x60003e7b\nkernel_init+0x6e/0x3d4\nnew_thread_handler+0x1e7/0x2c0\nThe buggy address belongs to stack of task swapper/1\nand is located at offset 64 in frame:\ninit_new_ldt+0x0/0x960\nThis frame has 2 objects:\n[32, 40) 'addr'\n[64, 80) 'desc'\n==================================================================", "A vulnerability was found in the Linux kernel's user mode (um) subsystem, specifically within the Local Descriptor Table (LDT) setup functionality. The issue arises from the syscall_stub_data() function misinterpreting the data_count parameter as a byte count rather than a count of longs, leading to an out-of-bounds read. This flaw could expose sensitive kernel memory and cause system instability."], "name": "CVE-2022-49395", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49395\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49395\nhttps://lore.kernel.org/linux-cve-announce/2025022650-CVE-2022-49395-7419@gregkh/T"], "threat_severity": "Moderate"}