{ "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-2023-53100", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53100", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-05-02T15:55:43.113Z", "updatedAt": "2026-10-15T21:41:26.510Z", "importedAt": "2026-10-24T01:57:03.413Z", "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": "ext4: fix WARNING in ext4_update_inline_data", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix WARNING in ext4_update_inline_data\n\nSyzbot found the following issue:\nEXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none.\nfscrypt: AES-256-CTS-CBC using implementation \"cts-cbc-aes-aesni\"\nfscrypt: AES-256-XTS using implementation \"xts-aes-aesni\"\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 5071 at mm/page_alloc.c:5525 __alloc_pages+0x30a/0x560 mm/page_alloc.c:5525\nModules linked in:\nCPU: 1 PID: 5071 Comm: syz-executor263 Not tainted 6.2.0-rc1-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nRIP: 0010:__alloc_pages+0x30a/0x560 mm/page_alloc.c:5525\nRSP: 0018:ffffc90003c2f1c0 EFLAGS: 00010246\nRAX: ffffc90003c2f220 RBX: 0000000000000014 RCX: 0000000000000000\nRDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90003c2f248\nRBP: ffffc90003c2f2d8 R08: dffffc0000000000 R09: ffffc90003c2f220\nR10: fffff52000785e49 R11: 1ffff92000785e44 R12: 0000000000040d40\nR13: 1ffff92000785e40 R14: dffffc0000000000 R15: 1ffff92000785e3c\nFS: 0000555556c0d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f95d5e04138 CR3: 00000000793aa000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n __alloc_pages_node include/linux/gfp.h:237 [inline]\n alloc_pages_node include/linux/gfp.h:260 [inline]\n __kmalloc_large_node+0x95/0x1e0 mm/slab_common.c:1113\n __do_kmalloc_node mm/slab_common.c:956 [inline]\n __kmalloc+0xfe/0x190 mm/slab_common.c:981\n kmalloc include/linux/slab.h:584 [inline]\n kzalloc include/linux/slab.h:720 [inline]\n ext4_update_inline_data+0x236/0x6b0 fs/ext4/inline.c:346\n ext4_update_inline_dir fs/ext4/inline.c:1115 [inline]\n ext4_try_add_inline_entry+0x328/0x990 fs/ext4/inline.c:1307\n ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385\n ext4_add_nondir+0x96/0x260 fs/ext4/namei.c:2772\n ext4_create+0x36c/0x560 fs/ext4/namei.c:2817\n lookup_open fs/namei.c:3413 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x12ac/0x2dd0 fs/namei.c:3711\n do_filp_open+0x264/0x4f0 fs/namei.c:3741\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_openat fs/open.c:1342 [inline]\n __se_sys_openat fs/open.c:1337 [inline]\n __x64_sys_openat+0x243/0x290 fs/open.c:1337\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\nAbove issue happens as follows:\next4_iget\n ext4_find_inline_data_nolock ->i_inline_off=164 i_inline_size=60\next4_try_add_inline_entry\n __ext4_mark_inode_dirty\n ext4_expand_extra_isize_ea ->i_extra_isize=32 s_want_extra_isize=44\n ext4_xattr_shift_entries\n\t ->after shift i_inline_off is incorrect, actually is change to 176\next4_try_add_inline_entry\n ext4_update_inline_dir\n get_max_inline_xattr_value_size\n if (EXT4_I(inode)->i_inline_off)\n\tentry = (struct ext4_xattr_entry *)((void *)raw_inode +\n\t\t\tEXT4_I(inode)->i_inline_off);\n free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size));\n\t->As entry is incorrect, then 'free' may be negative\n ext4_update_inline_data\n value = kzalloc(len, GFP_NOFS);\n -> len is unsigned int, maybe very large, then trigger warning when\n 'kzalloc()'\n\nTo resolve the above issue we need to update 'i_inline_off' after\n'ext4_xattr_shift_entries()'. We do not need to set\nEXT4_STATE_MAY_INLINE_DATA flag here, since ext4_mark_inode_dirty()\nalready sets this flag if needed. Setting EXT4_STATE_MAY_INLINE_DATA\nwhen it is needed may trigger a BUG_ON in ext4_writepages().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "c5aa102b433b1890e1ccaa40c06826c77dda1665" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "39c5df2ca544368b44b59d0f6d80131e90763371" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "74d775083e9f3d9dadf9e3b5f3e0028d1ad0bd5c" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "a9bd94f67b27739bbe8583c52256502bd4cc7e83" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "ca500cf2eceb5a8e93bf71ab97b5f7a18ecabce2" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "35161cec76772f74526f5886ad4082ec48511d5c" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "92eee6a82a9a6f9f83559e17a2b6b935e1a5cd25" }, { "version": "67cf5b09a46f72e048501b84996f2f77bc42e947", "status": "affected", "versionType": "git", "lessThan": "2b96b4a5d9443ca4cad58b0040be455803c05a42" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "4.14.310", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.278", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.237", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.175", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.103", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.20", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.2.*" }, { "version": "6.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }