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CVE-2023-53100 (GCVE-0-2023-53100)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2026-08-05 09:12
VLAI
Title
ext4: fix WARNING in ext4_update_inline_data
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix WARNING in ext4_update_inline_data Syzbot found the following issue: EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. fscrypt: AES-256-CTS-CBC using implementation "cts-cbc-aes-aesni" fscrypt: AES-256-XTS using implementation "xts-aes-aesni" ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5071 at mm/page_alloc.c:5525 __alloc_pages+0x30a/0x560 mm/page_alloc.c:5525 Modules linked in: CPU: 1 PID: 5071 Comm: syz-executor263 Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__alloc_pages+0x30a/0x560 mm/page_alloc.c:5525 RSP: 0018:ffffc90003c2f1c0 EFLAGS: 00010246 RAX: ffffc90003c2f220 RBX: 0000000000000014 RCX: 0000000000000000 RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90003c2f248 RBP: ffffc90003c2f2d8 R08: dffffc0000000000 R09: ffffc90003c2f220 R10: fffff52000785e49 R11: 1ffff92000785e44 R12: 0000000000040d40 R13: 1ffff92000785e40 R14: dffffc0000000000 R15: 1ffff92000785e3c FS: 0000555556c0d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f95d5e04138 CR3: 00000000793aa000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_pages_node include/linux/gfp.h:260 [inline] __kmalloc_large_node+0x95/0x1e0 mm/slab_common.c:1113 __do_kmalloc_node mm/slab_common.c:956 [inline] __kmalloc+0xfe/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ext4_update_inline_data+0x236/0x6b0 fs/ext4/inline.c:346 ext4_update_inline_dir fs/ext4/inline.c:1115 [inline] ext4_try_add_inline_entry+0x328/0x990 fs/ext4/inline.c:1307 ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385 ext4_add_nondir+0x96/0x260 fs/ext4/namei.c:2772 ext4_create+0x36c/0x560 fs/ext4/namei.c:2817 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12ac/0x2dd0 fs/namei.c:3711 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Above issue happens as follows: ext4_iget ext4_find_inline_data_nolock ->i_inline_off=164 i_inline_size=60 ext4_try_add_inline_entry __ext4_mark_inode_dirty ext4_expand_extra_isize_ea ->i_extra_isize=32 s_want_extra_isize=44 ext4_xattr_shift_entries ->after shift i_inline_off is incorrect, actually is change to 176 ext4_try_add_inline_entry ext4_update_inline_dir get_max_inline_xattr_value_size if (EXT4_I(inode)->i_inline_off) entry = (struct ext4_xattr_entry *)((void *)raw_inode + EXT4_I(inode)->i_inline_off); free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)); ->As entry is incorrect, then 'free' may be negative ext4_update_inline_data value = kzalloc(len, GFP_NOFS); -> len is unsigned int, maybe very large, then trigger warning when 'kzalloc()' To resolve the above issue we need to update 'i_inline_off' after 'ext4_xattr_shift_entries()'. We do not need to set EXT4_STATE_MAY_INLINE_DATA flag here, since ext4_mark_inode_dirty() already sets this flag if needed. Setting EXT4_STATE_MAY_INLINE_DATA when it is needed may trigger a BUG_ON in ext4_writepages().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < c5aa102b433b1890e1ccaa40c06826c77dda1665 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 39c5df2ca544368b44b59d0f6d80131e90763371 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 74d775083e9f3d9dadf9e3b5f3e0028d1ad0bd5c (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < a9bd94f67b27739bbe8583c52256502bd4cc7e83 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < ca500cf2eceb5a8e93bf71ab97b5f7a18ecabce2 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 35161cec76772f74526f5886ad4082ec48511d5c (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 92eee6a82a9a6f9f83559e17a2b6b935e1a5cd25 (git)
Affected: 67cf5b09a46f72e048501b84996f2f77bc42e947 , < 2b96b4a5d9443ca4cad58b0040be455803c05a42 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 4.14.310 , ≤ 4.14.* (semver)
Unaffected: 4.19.278 , ≤ 4.19.* (semver)
Unaffected: 5.4.237 , ≤ 5.4.* (semver)
Unaffected: 5.10.175 , ≤ 5.10.* (semver)
Unaffected: 5.15.103 , ≤ 5.15.* (semver)
Unaffected: 6.1.20 , ≤ 6.1.* (semver)
Unaffected: 6.2.7 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u003cTASK\u003e\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 -\u003ei_inline_off=164 i_inline_size=60\next4_try_add_inline_entry\n   __ext4_mark_inode_dirty\n      ext4_expand_extra_isize_ea -\u003ei_extra_isize=32 s_want_extra_isize=44\n         ext4_xattr_shift_entries\n\t -\u003eafter 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)-\u003ei_inline_off)\n\tentry = (struct ext4_xattr_entry *)((void *)raw_inode +\n\t\t\tEXT4_I(inode)-\u003ei_inline_off);\n        free += EXT4_XATTR_SIZE(le32_to_cpu(entry-\u003ee_value_size));\n\t-\u003eAs entry is incorrect, then \u0027free\u0027 may be negative\n   ext4_update_inline_data\n      value = kzalloc(len, GFP_NOFS);\n      -\u003e len is unsigned int, maybe very large, then trigger warning when\n         \u0027kzalloc()\u0027\n\nTo resolve the above issue we need to update \u0027i_inline_off\u0027 after\n\u0027ext4_xattr_shift_entries()\u0027.  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()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached via local VFS syscalls (openat/create \u2192 ext4_try_add_inline_entry / readdir \u2192 inline data helpers) on a mounted ext4 filesystem, not via any network or adjacent-link protocol path.\nAC:L - An attacker who can create files in an inline_data directory whose inode still needs extra-isize expansion (common after kernel upgrades, or forced via debug_want_extra_isize) can reliably trigger the stale i_inline_off path; no attacker-uncontrollable race is required.\nPR:L - On an already-mounted ext4 volume (e.g. Android userdata or /home) the trigger is ordinary unprivileged file creation/readdir with write access; unlike SWAP_BOOT-style paths, no init-namespace CAP_SYS_ADMIN is required on this entry point.\nUI:N - The attacker performs the create/readdir operations themselves on a filesystem that is already mounted in the worst reasonable deployment; no separate victim action is required.\nS:U - Impact remains within the host kernel\u0027s ext4/VFS authority (local memory corruption / DoS); there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - Stale i_inline_off causes ext4_read_inline_data to treat attacker-influenced inode bytes as e_value_offs and memcpy from IFIRST+offs with no bounds check, yielding an out-of-bounds kernel read into directory buffers.\nI:H - The same stale offset is consumed by ext4_get_inline_xattr_pos \u2192 ext4_add_dirent_to_inline, which writes directory entries to an unchecked IFIRST+e_value_offs destination\u2014an out-of-bounds kernel write exploitable for corruption/control-flow hijack.\nA:H - The demonstrated path computes a huge unsigned kzalloc length and hits WARN_ON_ONCE in __alloc_pages (panic_on_warn / oops class), and the OOB inline-data paths can likewise crash the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:12:46.679Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c5aa102b433b1890e1ccaa40c06826c77dda1665"
        },
        {
          "url": "https://git.kernel.org/stable/c/39c5df2ca544368b44b59d0f6d80131e90763371"
        },
        {
          "url": "https://git.kernel.org/stable/c/74d775083e9f3d9dadf9e3b5f3e0028d1ad0bd5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a9bd94f67b27739bbe8583c52256502bd4cc7e83"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca500cf2eceb5a8e93bf71ab97b5f7a18ecabce2"
        },
        {
          "url": "https://git.kernel.org/stable/c/35161cec76772f74526f5886ad4082ec48511d5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/92eee6a82a9a6f9f83559e17a2b6b935e1a5cd25"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b96b4a5d9443ca4cad58b0040be455803c05a42"
        }
      ],
      "title": "ext4: fix WARNING in ext4_update_inline_data",
      "x_generator": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53100",
    "datePublished": "2025-05-02T15:55:43.113Z",
    "dateReserved": "2025-05-02T15:51:43.553Z",
    "dateUpdated": "2026-08-05T09:12:46.679Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-18",
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                "product": "Linux",
                "programFiles": [
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
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                    "status": "unaffected",
                    "version": "5.4.237",
                    "versionType": "semver"
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                    "status": "unaffected",
                    "version": "5.10.175",
                    "versionType": "semver"
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                    "status": "unaffected",
                    "version": "5.15.103",
                    "versionType": "semver"
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                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.20",
                    "versionType": "semver"
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                    "lessThanOrEqual": "6.2.*",
                    "status": "unaffected",
                    "version": "6.2.7",
                    "versionType": "semver"
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                    "lessThanOrEqual": "*",
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                    "versionType": "original_commit_for_fix"
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                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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 \u003cTASK\u003e\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 -\u003ei_inline_off=164 i_inline_size=60\next4_try_add_inline_entry\n   __ext4_mark_inode_dirty\n      ext4_expand_extra_isize_ea -\u003ei_extra_isize=32 s_want_extra_isize=44\n         ext4_xattr_shift_entries\n\t -\u003eafter 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)-\u003ei_inline_off)\n\tentry = (struct ext4_xattr_entry *)((void *)raw_inode +\n\t\t\tEXT4_I(inode)-\u003ei_inline_off);\n        free += EXT4_XATTR_SIZE(le32_to_cpu(entry-\u003ee_value_size));\n\t-\u003eAs entry is incorrect, then \u0027free\u0027 may be negative\n   ext4_update_inline_data\n      value = kzalloc(len, GFP_NOFS);\n      -\u003e len is unsigned int, maybe very large, then trigger warning when\n         \u0027kzalloc()\u0027\n\nTo resolve the above issue we need to update \u0027i_inline_off\u0027 after\n\u0027ext4_xattr_shift_entries()\u0027.  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()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: correcci\u00f3n de ADVERTENCIA en ext4_update_inline_data. Syzbot encontr\u00f3 el siguiente problema: EXT4-fs (loop0): sistema de archivos montado 00000000-0000-0000-0000-00000000000 sin registro. Modo de cuota: ninguno. fscrypt: AES-256-CTS-CBC con implementaci\u00f3n \"cts-cbc-aes-aesni\" fscrypt: AES-256-XTS con implementaci\u00f3n \"xts-aes-aesni\" ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 0 PID: 5071 en mm/page_alloc.c:5525 __alloc_pages+0x30a/0x560 mm/page_alloc.c:5525 M\u00f3dulos vinculados: CPU: 1 PID: 5071 Comm: syz-executor263 No contaminado 6.2.0-rc1-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 26/10/2022 RIP: 0010:__alloc_pages+0x30a/0x560 mm/page_alloc.c:5525 RSP: 0018:ffffc90003c2f1c0 EFLAGS: 00010246 RAX: ffffc90003c2f220 RBX: 0000000000000014 RCX: 0000000000000000 RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90003c2f248 RBP: ffffc90003c2f2d8 R08: dffffc0000000000 R09: ffffc90003c2f220 R10: fffff52000785e49 R11: 1ffff92000785e44 R12: 0000000000040d40 R13: 1ffff92000785e40 R14: dffffc0000000000 R15: 1ffff92000785e3c FS: 0000555556c0d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f95d5e04138 CR3: 00000000793aa000 CR4: 000000000003506f0 DR0: 00000000000000000 DR1: 00000000000000000 DR2: 00000000  __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_pages_node include/linux/gfp.h:260 [inline] __kmalloc_large_node+0x95/0x1e0 mm/slab_common.c:1113 __do_kmalloc_node mm/slab_common.c:956 [inline] __kmalloc+0xfe/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ext4_update_inline_data+0x236/0x6b0 fs/ext4/inline.c:346 ext4_update_inline_dir fs/ext4/inline.c:1115 [inline] ext4_try_add_inline_entry+0x328/0x990 fs/ext4/inline.c:1307 ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385 ext4_add_nondir+0x96/0x260 fs/ext4/namei.c:2772 ext4_create+0x36c/0x560 fs/ext4/namei.c:2817 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12ac/0x2dd0 fs/namei.c:3711 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Above issue happens as follows: ext4_iget ext4_find_inline_data_nolock -\u0026gt;i_inline_off=164 i_inline_size=60 ext4_try_add_inline_entry __ext4_mark_inode_dirty ext4_expand_extra_isize_ea -\u0026gt;i_extra_isize=32 s_want_extra_isize=44 ext4_xattr_shift_entries -\u0026gt;after shift i_inline_off is incorrect, actually is change to 176 ext4_try_add_inline_entry ext4_update_inline_dir get_max_inline_xattr_value_size if (EXT4_I(inode)-\u0026gt;i_inline_off) entry = (struct ext4_xattr_entry *)((void *)raw_inode + EXT4_I(inode)-\u0026gt;i_inline_off); free += EXT4_XATTR_SIZE(le32_to_cpu(entry-\u0026gt;e_value_size)); -\u0026gt;Como la entrada es incorrecta, entonces \u0027libre\u0027 puede ser negativo ext4_update_inline_data valor = kzalloc(len, GFP_NOFS); -\u0026gt; len es un entero sin signo, posiblemente muy grande, por lo que se activa una advertencia al ejecutar \u0027kzalloc()\u0027. Para resolver el problema anterior, debemos actualizar \u0027i_inline_off\u0027 despu\u00e9s de \u0027ext4_xattr_shift_entries()\u0027. No es necesario activar el indicador EXT4_STATE_MAY_INLINE_DATA, ya que ext4_mark_inode_dirty() ya lo activa si es necesario. Activar EXT4_STATE_MAY_INLINE_DATA cuando es necesario puede activar un error BUG_ON en ext4_writepages()."
          }
        ],
        "id": "CVE-2023-53100",
        "lastModified": "2026-08-04T10:18:55.073",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-05-02T16:15:28.923",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2b96b4a5d9443ca4cad58b0040be455803c05a42"
          },
          {
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          },
          {
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            "tags": [
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            ],
            "url": "https://git.kernel.org/stable/c/39c5df2ca544368b44b59d0f6d80131e90763371"
          },
          {
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            "url": "https://git.kernel.org/stable/c/74d775083e9f3d9dadf9e3b5f3e0028d1ad0bd5c"
          },
          {
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            "url": "https://git.kernel.org/stable/c/92eee6a82a9a6f9f83559e17a2b6b935e1a5cd25"
          },
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/a9bd94f67b27739bbe8583c52256502bd4cc7e83"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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            "url": "https://git.kernel.org/stable/c/c5aa102b433b1890e1ccaa40c06826c77dda1665"
          },
          {
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            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ca500cf2eceb5a8e93bf71ab97b5f7a18ecabce2"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T03:51:28+00:00",
      "cve": "CVE-2023-53100",
      "id": "CVE-2023-53100",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ext4: fix WARNING in ext4_update_inline_data",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53100.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:59:45Z",
      "cve": "CVE-2023-53100",
      "id": "CVE-2023-53100",
      "initial_release_date": "2025-05-03T02:50:42Z",
      "product_status:known_affected": "535",
      "product_status:known_not_affected": "147",
      "product_status:recommended": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53100",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53100.json",
      "version": "42"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.