{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-49567", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49567", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:23:12.222Z", "updatedAt": "2026-05-11T19:02:26.927Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "mm/mempolicy: fix uninit-value in mpol_rebind_policy()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mempolicy: fix uninit-value in mpol_rebind_policy()\n\nmpol_set_nodemask()(mm/mempolicy.c) does not set up nodemask when\npol->mode is MPOL_LOCAL. Check pol->mode before access\npol->w.cpuset_mems_allowed in mpol_rebind_policy()(mm/mempolicy.c).\n\nBUG: KMSAN: uninit-value in mpol_rebind_policy mm/mempolicy.c:352 [inline]\nBUG: KMSAN: uninit-value in mpol_rebind_task+0x2ac/0x2c0 mm/mempolicy.c:368\n mpol_rebind_policy mm/mempolicy.c:352 [inline]\n mpol_rebind_task+0x2ac/0x2c0 mm/mempolicy.c:368\n cpuset_change_task_nodemask kernel/cgroup/cpuset.c:1711 [inline]\n cpuset_attach+0x787/0x15e0 kernel/cgroup/cpuset.c:2278\n cgroup_migrate_execute+0x1023/0x1d20 kernel/cgroup/cgroup.c:2515\n cgroup_migrate kernel/cgroup/cgroup.c:2771 [inline]\n cgroup_attach_task+0x540/0x8b0 kernel/cgroup/cgroup.c:2804\n __cgroup1_procs_write+0x5cc/0x7a0 kernel/cgroup/cgroup-v1.c:520\n cgroup1_tasks_write+0x94/0xb0 kernel/cgroup/cgroup-v1.c:539\n cgroup_file_write+0x4c2/0x9e0 kernel/cgroup/cgroup.c:3852\n kernfs_fop_write_iter+0x66a/0x9f0 fs/kernfs/file.c:296\n call_write_iter include/linux/fs.h:2162 [inline]\n new_sync_write fs/read_write.c:503 [inline]\n vfs_write+0x1318/0x2030 fs/read_write.c:590\n ksys_write+0x28b/0x510 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __x64_sys_write+0xdb/0x120 fs/read_write.c:652\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:524 [inline]\n slab_alloc_node mm/slub.c:3251 [inline]\n slab_alloc mm/slub.c:3259 [inline]\n kmem_cache_alloc+0x902/0x11c0 mm/slub.c:3264\n mpol_new mm/mempolicy.c:293 [inline]\n do_set_mempolicy+0x421/0xb70 mm/mempolicy.c:853\n kernel_set_mempolicy mm/mempolicy.c:1504 [inline]\n __do_sys_set_mempolicy mm/mempolicy.c:1510 [inline]\n __se_sys_set_mempolicy+0x44c/0xb60 mm/mempolicy.c:1507\n __x64_sys_set_mempolicy+0xd8/0x110 mm/mempolicy.c:1507\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nKMSAN: uninit-value in mpol_rebind_task (2)\nhttps://syzkaller.appspot.com/bug?id=d6eb90f952c2a5de9ea718a1b873c55cb13b59dc\n\nThis patch seems to fix below bug too.\nKMSAN: uninit-value in mpol_rebind_mm (2)\nhttps://syzkaller.appspot.com/bug?id=f2fecd0d7013f54ec4162f60743a2b28df40926b\n\nThe uninit-value is pol->w.cpuset_mems_allowed in mpol_rebind_policy().\nWhen syzkaller reproducer runs to the beginning of mpol_new(),\n\n\t mpol_new() mm/mempolicy.c\n\t do_mbind() mm/mempolicy.c\n\tkernel_mbind() mm/mempolicy.c\n\n`mode` is 1(MPOL_PREFERRED), nodes_empty(*nodes) is `true` and `flags`\nis 0. Then\n\n\tmode = MPOL_LOCAL;\n\t...\n\tpolicy->mode = mode;\n\tpolicy->flags = flags;\n\nwill be executed. So in mpol_set_nodemask(),\n\n\t mpol_set_nodemask() mm/mempolicy.c\n\t do_mbind()\n\tkernel_mbind()\n\npol->mode is 4 (MPOL_LOCAL), that `nodemask` in `pol` is not initialized,\nwhich will be accessed in mpol_rebind_policy().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "7858d7bca7fbbbbd5b940d2ec371b2d060b21b84", "status": "affected", "versionType": "git", "lessThan": "8c5429a04ccd8dbcc3c753dab2f4126774ec28d4" }, { "version": "7858d7bca7fbbbbd5b940d2ec371b2d060b21b84", "status": "affected", "versionType": "git", "lessThan": "777e563f10e91e91130fe06bee85220d508e7b9b" }, { "version": "7858d7bca7fbbbbd5b940d2ec371b2d060b21b84", "status": "affected", "versionType": "git", "lessThan": "018160ad314d75b1409129b2247b614a9f35894c" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.14" }, { "version": "5.15.58", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.18.15", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }