CVE-2023-53265

Estado: ModificadaAlta (7.1)—

In the Linux kernel, the following vulnerability has been resolved:

ubi: ensure that VID header offset + VID header size <= alloc, size

Ensure that the VID header offset + VID header size does not exceed the allocated area to avoid slab OOB.

The buggy address belongs to the physical page: page:00000000ea4d1263 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bb36 head:00000000ea4d1263 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff) raw: 000fffffc0010200 ffffea000066c300 dead000000000003 ffff888100042b40 raw: 0000000000000000 00000000001 ---truncated---

Detalles técnicos trazas, registros y código del informe original

BUG: KASAN: slab-out-of-bounds in crc32_body lib/crc32.c:111 [inline]
BUG: KASAN: slab-out-of-bounds in crc32_le_generic lib/crc32.c:179 [inline]
BUG: KASAN: slab-out-of-bounds in crc32_le_base+0x58c/0x626 lib/crc32.c:197
Read of size 4 at addr ffff88802bb36f00 by task syz-executor136/1555

CPU: 2 PID: 1555 Comm: syz-executor136 Tainted: G        W
6.0.0-1868 #1
Hardware name: Red Hat KVM, BIOS 1.13.0-2.module+el8.3.0+7860+a7792d29
04/01/2014
Call Trace:
  <TASK>
  __dump_stack lib/dump_stack.c:88 [inline]
  dump_stack_lvl+0x85/0xad lib/dump_stack.c:106
  print_address_description mm/kasan/report.c:317 [inline]
  print_report.cold.13+0xb6/0x6bb mm/kasan/report.c:433
  kasan_report+0xa7/0x11b mm/kasan/report.c:495
  crc32_body lib/crc32.c:111 [inline]
  crc32_le_generic lib/crc32.c:179 [inline]
  crc32_le_base+0x58c/0x626 lib/crc32.c:197
  ubi_io_write_vid_hdr+0x1b7/0x472 drivers/mtd/ubi/io.c:1067
  create_vtbl+0x4d5/0x9c4 drivers/mtd/ubi/vtbl.c:317
  create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]
  ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812
  ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601
  ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965
  ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043
  vfs_ioctl fs/ioctl.c:51 [inline]
  __do_sys_ioctl fs/ioctl.c:870 [inline]
  __se_sys_ioctl fs/ioctl.c:856 [inline]
  __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856
  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
  do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80
  entry_SYSCALL_64_after_hwframe+0x63/0x0
RIP: 0033:0x7f96d5cf753d
Code:
RSP: 002b:00007fffd72206f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96d5cf753d
RDX: 0000000020000080 RSI: 0000000040186f40 RDI: 0000000000000003
RBP: 0000000000400cd0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400be0
R13: 00007fffd72207e0 R14: 0000000000000000 R15: 0000000000000000
  </TASK>

Allocated by task 1555:
  kasan_save_stack+0x20/0x3d mm/kasan/common.c:38
  kasan_set_track mm/kasan/common.c:45 [inline]
  set_alloc_info mm/kasan/common.c:437 [inline]
  ____kasan_kmalloc mm/kasan/common.c:516 [inline]
  __kasan_kmalloc+0x88/0xa3 mm/kasan/common.c:525
  kasan_kmalloc include/linux/kasan.h:234 [inline]
  __kmalloc+0x138/0x257 mm/slub.c:4429
  kmalloc include/linux/slab.h:605 [inline]
  ubi_alloc_vid_buf drivers/mtd/ubi/ubi.h:1093 [inline]
  create_vtbl+0xcc/0x9c4 drivers/mtd/ubi/vtbl.c:295
  create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]
  ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812
  ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601
  ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965
  ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043
  vfs_ioctl fs/ioctl.c:51 [inline]
  __do_sys_ioctl fs/ioctl.c:870 [inline]
  __se_sys_ioctl fs/ioctl.c:856 [inline]
  __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856
  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
  do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80
  entry_SYSCALL_64_after_hwframe+0x63/0x0

The buggy address belongs to the object at ffff88802bb36e00
  which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
  256-byte region [ffff88802bb36e00, ffff88802bb36f00)

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation60 %
Impacto principalT1059 Command and Scripting Interpreterexecution55 %

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-125
CWE-125

Referencias

JSON original (NVD)

Mostrar

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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-125"
        }
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "value": "CWE-125"
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: ensure that VID header offset + VID header size <= alloc, size\n\nEnsure that the VID header offset + VID header size does not exceed\nthe allocated area to avoid slab OOB.\n\nBUG: KASAN: slab-out-of-bounds in crc32_body lib/crc32.c:111 [inline]\nBUG: KASAN: slab-out-of-bounds in crc32_le_generic lib/crc32.c:179 [inline]\nBUG: KASAN: slab-out-of-bounds in crc32_le_base+0x58c/0x626 lib/crc32.c:197\nRead of size 4 at addr ffff88802bb36f00 by task syz-executor136/1555\n\nCPU: 2 PID: 1555 Comm: syz-executor136 Tainted: G        W\n6.0.0-1868 #1\nHardware name: Red Hat KVM, BIOS 1.13.0-2.module+el8.3.0+7860+a7792d29\n04/01/2014\nCall Trace:\n  <TASK>\n  __dump_stack lib/dump_stack.c:88 [inline]\n  dump_stack_lvl+0x85/0xad lib/dump_stack.c:106\n  print_address_description mm/kasan/report.c:317 [inline]\n  print_report.cold.13+0xb6/0x6bb mm/kasan/report.c:433\n  kasan_report+0xa7/0x11b mm/kasan/report.c:495\n  crc32_body lib/crc32.c:111 [inline]\n  crc32_le_generic lib/crc32.c:179 [inline]\n  crc32_le_base+0x58c/0x626 lib/crc32.c:197\n  ubi_io_write_vid_hdr+0x1b7/0x472 drivers/mtd/ubi/io.c:1067\n  create_vtbl+0x4d5/0x9c4 drivers/mtd/ubi/vtbl.c:317\n  create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]\n  ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812\n  ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601\n  ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965\n  ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:870 [inline]\n  __se_sys_ioctl fs/ioctl.c:856 [inline]\n  __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856\n  do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n  do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80\n  entry_SYSCALL_64_after_hwframe+0x63/0x0\nRIP: 0033:0x7f96d5cf753d\nCode:\nRSP: 002b:00007fffd72206f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96d5cf753d\nRDX: 0000000020000080 RSI: 0000000040186f40 RDI: 0000000000000003\nRBP: 0000000000400cd0 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400be0\nR13: 00007fffd72207e0 R14: 0000000000000000 R15: 0000000000000000\n  </TASK>\n\nAllocated by task 1555:\n  kasan_save_stack+0x20/0x3d mm/kasan/common.c:38\n  kasan_set_track mm/kasan/common.c:45 [inline]\n  set_alloc_info mm/kasan/common.c:437 [inline]\n  ____kasan_kmalloc mm/kasan/common.c:516 [inline]\n  __kasan_kmalloc+0x88/0xa3 mm/kasan/common.c:525\n  kasan_kmalloc include/linux/kasan.h:234 [inline]\n  __kmalloc+0x138/0x257 mm/slub.c:4429\n  kmalloc include/linux/slab.h:605 [inline]\n  ubi_alloc_vid_buf drivers/mtd/ubi/ubi.h:1093 [inline]\n  create_vtbl+0xcc/0x9c4 drivers/mtd/ubi/vtbl.c:295\n  create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]\n  ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812\n  ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601\n  ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965\n  ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:870 [inline]\n  __se_sys_ioctl fs/ioctl.c:856 [inline]\n  __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856\n  do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n  do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80\n  entry_SYSCALL_64_after_hwframe+0x63/0x0\n\nThe buggy address belongs to the object at ffff88802bb36e00\n  which belongs to the cache kmalloc-256 of size 256\nThe buggy address is located 0 bytes to the right of\n  256-byte region [ffff88802bb36e00, ffff88802bb36f00)\n\nThe buggy address belongs to the physical page:\npage:00000000ea4d1263 refcount:1 mapcount:0 mapping:0000000000000000\nindex:0x0 pfn:0x2bb36\nhead:00000000ea4d1263 order:1 compound_mapcount:0 compound_pincount:0\nflags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff)\nraw: 000fffffc0010200 ffffea000066c300 dead000000000003 ffff888100042b40\nraw: 0000000000000000 00000000001\n---truncated---"
    }
  ],
  "lastModified": "2026-06-17T06:44:40.700",
  "configurations": [
    {
      "nodes": [
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