{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56613", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.014Z", "datePublished": "2024-12-27T14:51:18.068Z", "dateUpdated": "2026-05-11T20:55:51.104Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:55:51.104Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/numa: fix memory leak due to the overwritten vma->numab_state\n\n[Problem Description]\nWhen running the hackbench program of LTP, the following memory leak is\nreported by kmemleak.\n\n # /opt/ltp/testcases/bin/hackbench 20 thread 1000\n Running with 20*40 (== 800) tasks.\n\n # dmesg | grep kmemleak\n ...\n kmemleak: 480 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\n kmemleak: 665 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\n\n # cat /sys/kernel/debug/kmemleak\n unreferenced object 0xffff888cd8ca2c40 (size 64):\n comm \"hackbench\", pid 17142, jiffies 4299780315\n hex dump (first 32 bytes):\n ac 74 49 00 01 00 00 00 4c 84 49 00 01 00 00 00 .tI.....L.I.....\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace (crc bff18fd4):\n [] __kmalloc_cache_noprof+0x2f9/0x3f0\n [] task_numa_work+0x725/0xa00\n [] task_work_run+0x58/0x90\n [] syscall_exit_to_user_mode+0x1c8/0x1e0\n [] do_syscall_64+0x85/0x150\n [] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n ...\n\nThis issue can be consistently reproduced on three different servers:\n * a 448-core server\n * a 256-core server\n * a 192-core server\n\n[Root Cause]\nSince multiple threads are created by the hackbench program (along with\nthe command argument 'thread'), a shared vma might be accessed by two or\nmore cores simultaneously. When two or more cores observe that\nvma->numab_state is NULL at the same time, vma->numab_state will be\noverwritten.\n\nAlthough current code ensures that only one thread scans the VMAs in a\nsingle 'numa_scan_period', there might be a chance for another thread\nto enter in the next 'numa_scan_period' while we have not gotten till\nnumab_state allocation [1].\n\nNote that the command `/opt/ltp/testcases/bin/hackbench 50 process 1000`\ncannot the reproduce the issue. It is verified with 200+ test runs.\n\n[Solution]\nUse the cmpxchg atomic operation to ensure that only one thread executes\nthe vma->numab_state assignment.\n\n[1] https://lore.kernel.org/lkml/1794be3c-358c-4cdc-a43d-a1f841d91ef7@amd.com/" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/sched/fair.c" ], "versions": [ { "version": "ef6a22b70f6d90449a5c797b8968a682824e2011", "lessThan": "8f149bcc4d91ac92b32ff4949b291e6ed883dc42", "status": "affected", "versionType": "git" }, { "version": "ef6a22b70f6d90449a5c797b8968a682824e2011", "lessThan": "a71ddd5b87cda687efa28e049e85e923689bcef9", "status": "affected", "versionType": "git" }, { "version": "ef6a22b70f6d90449a5c797b8968a682824e2011", "lessThan": "5f1b64e9a9b7ee9cfd32c6b2fab796e29bfed075", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/sched/fair.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "6.4", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8f149bcc4d91ac92b32ff4949b291e6ed883dc42" }, { "url": "https://git.kernel.org/stable/c/a71ddd5b87cda687efa28e049e85e923689bcef9" }, { "url": "https://git.kernel.org/stable/c/5f1b64e9a9b7ee9cfd32c6b2fab796e29bfed075" } ], "title": "sched/numa: fix memory leak due to the overwritten vma->numab_state", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "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": { "id": "CVE-2024-56613", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:01:15.881890Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:13.487Z" } } ] } }