{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49623", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.420Z", "datePublished": "2025-02-26T02:23:39.834Z", "dateUpdated": "2026-05-11T19:03:30.653Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:03:30.653Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/xive/spapr: correct bitmap allocation size\n\nkasan detects access beyond the end of the xibm->bitmap allocation:\n\nBUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140\nRead of size 8 at addr c00000001d1d0118 by task swapper/0/1\n\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28\nCall Trace:\n[c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable)\n[c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710\n[c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354\n[c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0\n[c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140\n[c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260\n[c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450\n[c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118\n[c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac\n[c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640\n[c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0\n[c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64\n\nAllocated by task 0:\n kasan_save_stack+0x34/0x70\n __kasan_kmalloc+0xb4/0xf0\n __kmalloc+0x268/0x540\n xive_spapr_init+0x4d0/0x77c\n pseries_init_irq+0x40/0x27c\n init_IRQ+0x44/0x84\n start_kernel+0x2a4/0x538\n start_here_common+0x1c/0x20\n\nThe buggy address belongs to the object at c00000001d1d0118\n which belongs to the cache kmalloc-8 of size 8\nThe buggy address is located 0 bytes inside of\n 8-byte region [c00000001d1d0118, c00000001d1d0120)\n\nThe buggy address belongs to the physical page:\npage:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d\nflags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff)\nraw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480\nraw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc\n>c00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc\n c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc\n\nThis happens because the allocation uses the wrong unit (bits) when it\nshould pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small\nnumbers of bits, the allocated object can be smaller than sizeof(long),\nwhich results in invalid accesses.\n\nUse bitmap_zalloc() to allocate and initialize the irq bitmap, paired with\nbitmap_free() for consistency." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/sysdev/xive/spapr.c" ], "versions": [ { "version": "eac1e731b59ee3b5f5e641a7765c7ed41ed26226", "lessThan": "10f2cd373e65bcd3be8f3cdc71c330c25763dfd8", "status": "affected", "versionType": "git" }, { "version": "eac1e731b59ee3b5f5e641a7765c7ed41ed26226", "lessThan": "99d1c36bddd93919072b5a51a89297bbb5ad6a6f", "status": "affected", "versionType": "git" }, { "version": "eac1e731b59ee3b5f5e641a7765c7ed41ed26226", "lessThan": "19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/sysdev/xive/spapr.c" ], "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.56", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.13", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "5.15.56" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.18.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/10f2cd373e65bcd3be8f3cdc71c330c25763dfd8" }, { "url": "https://git.kernel.org/stable/c/99d1c36bddd93919072b5a51a89297bbb5ad6a6f" }, { "url": "https://git.kernel.org/stable/c/19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe" } ], "title": "powerpc/xive/spapr: correct bitmap allocation size", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "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-2022-49623", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:34:34.646128Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:36:50.564Z" } } ] } }