{"cve":"CVE-2022-49846","nvd":{"published":"2025-05-01T15:16:08.113","modified":"2026-06-17T05:19:17.480","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix a slab-out-of-bounds write bug in udf_find_entry()\n\nSyzbot reported a slab-out-of-bounds Write bug:\n\nloop0: detected capacity change from 0 to 2048\n==================================================================\nBUG: KASAN: slab-out-of-bounds in udf_find_entry+0x8a5/0x14f0\nfs/udf/namei.c:253\nWrite of size 105 at addr ffff8880123ff896 by task syz-executor323/3610\n\nCPU: 0 PID: 3610 Comm: syz-executor323 Not tainted\n6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0\nHardware name: Google Compute Engine/Google Compute Engine, BIOS\nGoogle 10/11/2022\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n print_address_description+0x74/0x340 mm/kasan/report.c:284\n print_report+0x107/0x1f0 mm/kasan/report.c:395\n kasan_report+0xcd/0x100 mm/kasan/report.c:495\n kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189\n memcpy+0x3c/0x60 mm/kasan/shadow.c:66\n udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253\n udf_lookup+0xef/0x340 fs/udf/namei.c:309\n lookup_open fs/namei.c:3391 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x10e6/0x2df0 fs/namei.c:3710\n do_filp_open+0x264/0x4f0 fs/namei.c:3740\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_creat fs/open.c:1402 [inline]\n __se_sys_creat fs/open.c:1396 [inline]\n __x64_sys_creat+0x11f/0x160 fs/open.c:1396\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7ffab0d164d9\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89\nf7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01\nf0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffe1a7e6bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffab0d164d9\nRDX: 00007ffab0d164d9 RSI: 0000000000000000 RDI: 0000000020000180\nRBP: 00007ffab0cd5a10 R08: 0000000000000000 R09: 0000000000000000\nR10: 00005555573552c0 R11: 0000000000000246 R12: 00007ffab0cd5aa0\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n </TASK>\n\nAllocated by task 3610:\n kasan_save_stack mm/kasan/common.c:45 [inline]\n kasan_set_track+0x3d/0x60 mm/kasan/common.c:52\n ____kasan_kmalloc mm/kasan/common.c:371 [inline]\n __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380\n kmalloc include/linux/slab.h:576 [inline]\n udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243\n udf_lookup+0xef/0x340 fs/udf/namei.c:309\n lookup_open fs/namei.c:3391 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x10e6/0x2df0 fs/namei.c:3710\n do_filp_open+0x264/0x4f0 fs/namei.c:3740\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_creat fs/open.c:1402 [inline]\n __se_sys_creat fs/open.c:1396 [inline]\n __x64_sys_creat+0x11f/0x160 fs/open.c:1396\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe buggy address belongs to the object at ffff8880123ff800\n which belongs to the cache kmalloc-256 of size 256\nThe buggy address is located 150 bytes inside of\n 256-byte region [ffff8880123ff800, ffff8880123ff900)\n\nThe buggy address belongs to the physical page:\npage:ffffea000048ff80 refcount:1 mapcount:0 mapping:0000000000000000\nindex:0x0 pfn:0x123fe\nhead:ffffea000048ff80 order:1 compound_mapcount:0 compound_pincount:0\nflags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)\nraw: 00fff00000010200 ffffea00004b8500 dead000000000003 ffff888012041b40\nraw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\npage_owner tracks the page as allocated\npage last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(),\npid 1, tgid 1 (swapper/0), ts 1841222404, free_ts 0\n create_dummy_stack mm/page_owner.c:\n---truncated---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/03f9582a6a2ebd25a440896475c968428c4b63e7","https://git.kernel.org/stable/c/583fdd98d94acba1e7225e5cc29063aef0741030","https://git.kernel.org/stable/c/7a6051d734f1ed0031e2216f9a538621235c11a4","https://git.kernel.org/stable/c/ac79001b8e603226fab17240a79cb9ef679d3cd9","https://git.kernel.org/stable/c/c736ed8541605e3a25075bb1cbf8f38cb3083238"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2022-49846","score":0.00244,"percentile":0.15609,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}