{ "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-2022-49170", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49170", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T01:55:27.562Z", "updatedAt": "2026-08-12T23:58:11.094Z", "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": "f2fs: fix to do sanity check on curseg->alloc_type", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on curseg->alloc_type\n\nAs Wenqing Liu reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215657\n\n- Overview\nUBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 when mount and operate a corrupted image\n\n- Reproduce\ntested on kernel 5.17-rc4, 5.17-rc6\n\n1. mkdir test_crash\n2. cd test_crash\n3. unzip tmp2.zip\n4. mkdir mnt\n5. ./single_test.sh f2fs 2\n\n- Kernel dump\n[ 46.434454] loop0: detected capacity change from 0 to 131072\n[ 46.529839] F2FS-fs (loop0): Mounted with checkpoint version = 7548c2d9\n[ 46.738319] ================================================================================\n[ 46.738412] UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2\n[ 46.738475] index 231 is out of range for type 'unsigned int [2]'\n[ 46.738539] CPU: 2 PID: 939 Comm: umount Not tainted 5.17.0-rc6 #1\n[ 46.738547] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n[ 46.738551] Call Trace:\n[ 46.738556] \n[ 46.738563] dump_stack_lvl+0x47/0x5c\n[ 46.738581] ubsan_epilogue+0x5/0x50\n[ 46.738592] __ubsan_handle_out_of_bounds+0x68/0x80\n[ 46.738604] f2fs_allocate_data_block+0xdff/0xe60 [f2fs]\n[ 46.738819] do_write_page+0xef/0x210 [f2fs]\n[ 46.738934] f2fs_do_write_node_page+0x3f/0x80 [f2fs]\n[ 46.739038] __write_node_page+0x2b7/0x920 [f2fs]\n[ 46.739162] f2fs_sync_node_pages+0x943/0xb00 [f2fs]\n[ 46.739293] f2fs_write_checkpoint+0x7bb/0x1030 [f2fs]\n[ 46.739405] kill_f2fs_super+0x125/0x150 [f2fs]\n[ 46.739507] deactivate_locked_super+0x60/0xc0\n[ 46.739517] deactivate_super+0x70/0xb0\n[ 46.739524] cleanup_mnt+0x11a/0x200\n[ 46.739532] __cleanup_mnt+0x16/0x20\n[ 46.739538] task_work_run+0x67/0xa0\n[ 46.739547] exit_to_user_mode_prepare+0x18c/0x1a0\n[ 46.739559] syscall_exit_to_user_mode+0x26/0x40\n[ 46.739568] do_syscall_64+0x46/0xb0\n[ 46.739584] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is we missed to do sanity check on curseg->alloc_type,\nresult in out-of-bound accessing on sbi->block_count[] array, fix it.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "status": "affected", "versionType": "git", "lessThan": "498b7088db71f9707359448cd6800bbb1882f4c3" }, { "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "status": "affected", "versionType": "git", "lessThan": "f68caedf264a95c0b02dfd0d9f92ac2637d5848a" }, { "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "status": "affected", "versionType": "git", "lessThan": "0748a0f7dcb9d9dddc80302d73ebcecef6782ef0" }, { "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "status": "affected", "versionType": "git", "lessThan": "c12765e3f129b144421c80d3383df885f85ee290" }, { "version": "351df4b201157351c7d26bf12c3eeb9dbce98854", "status": "affected", "versionType": "git", "lessThan": "f41ee8b91c00770d718be2ff4852a80017ae9ab3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.10.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.33", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.16.19", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.16.*" }, { "version": "5.17.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }