{
  "cveId": "CVE-2023-52770",
  "url": "https://patchblox.com/security/cve/CVE-2023-52770",
  "summary": "CVE-2023-52770 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52770, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: split initial and dynamic conditions for e...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: split initial and dynamic conditions for extent_cache  Let\u0027s allocate the extent_cache tree without dynamic conditions to avoid a missing condition causing a panic as below.   # create a file w/ a compressed flag  # disable the compression  # panic while updating extent_cache  F2FS-fs (dm-64): Swapfile: last extent is not aligned to section F2FS-fs (dm-64): Swapfile (3) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * N) Adding 124996k swap on ./swap-file.  Priority:0 extents:2 across:17179494468k ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline] BUG: KASAN: null-ptr-deref in atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline] BUG: KASAN: null-ptr-deref in queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline] BUG: KASAN: null-ptr-deref in __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline] BUG: KASAN: null-ptr-deref in _raw_write_lock\u002B0x5a/0x110 out/common/kernel/locking/spinlock.c:295 Write of size 4 at addr 0000000000000030 by task syz-executor154/3327  CPU: 0 PID: 3327 Comm: syz-executor154 Tainted: G           O      5.10.185 #1 Hardware name: emulation qemu-x86/qemu-x86, BIOS 2023.01-21885-gb3cc1cd24d 01/01/2023 Call Trace:  __dump_stack out/common/lib/dump_stack.c:77 [inline]  dump_stack_lvl\u002B0x17e/0x1c4 out/common/lib/dump_stack.c:118  __kasan_report\u002B0x16c/0x260 out/common/mm/kasan/report.c:415  kasan_report\u002B0x51/0x70 out/common/mm/kasan/report.c:428  kasan_check_range\u002B0x2f3/0x340 out/common/mm/kasan/generic.c:186  __kasan_check_write\u002B0x14/0x20 out/common/mm/kasan/shadow.c:37  instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline]  atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline]  queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline]  __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline]  _raw_write_lock\u002B0x5a/0x110 out/common/kernel/locking/spinlock.c:295  __drop_extent_tree\u002B0xdf/0x2f0 out/common/fs/f2fs/extent_cache.c:1155  f2fs_drop_extent_tree\u002B0x17/0x30 out/common/fs/f2fs/extent_cache.c:1172  f2fs_insert_range out/common/fs/f2fs/file.c:1600 [inline]  f2fs_fallocate\u002B0x19fd/0x1f40 out/common/fs/f2fs/file.c:1764  vfs_fallocate\u002B0x514/0x9b0 out/common/fs/open.c:310  ksys_fallocate out/common/fs/open.c:333 [inline]  __do_sys_fallocate out/common/fs/open.c:341 [inline]  __se_sys_fallocate out/common/fs/open.c:339 [inline]  __x64_sys_fallocate\u002B0xb8/0x100 out/common/fs/open.c:339  do_syscall_64\u002B0x35/0x50 out/common/arch/x86/entry/common.c:46",
  "published": "2024-05-21T16:15:16Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00236,
  "epssPercentile": 0.14602,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.5.13-1",
      "fix": "DEBIAN-CVE-2023-52770",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52770",
      "released": "2024-05-21T16:15:16Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.5.13-1",
      "fix": "DEBIAN-CVE-2023-52770",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52770",
      "released": "2024-05-21T16:15:16Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T19:38:12Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}