5.5

CVE-2024-50161

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

bpf: Check the remaining info_cnt before repeating btf fields

When trying to repeat the btf fields for array of nested struct, it
doesn't check the remaining info_cnt. The following splat will be
reported when the value of ret * nelems is greater than BTF_FIELDS_MAX:

  ------------[ cut here ]------------
  UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49
  index 11 is out of range for type 'btf_field_info [11]'
  CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1
  Tainted: [O]=OOT_MODULE
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ...
  Call Trace:
   <TASK>
   dump_stack_lvl+0x57/0x70
   dump_stack+0x10/0x20
   ubsan_epilogue+0x9/0x40
   __ubsan_handle_out_of_bounds+0x6f/0x80
   ? kallsyms_lookup_name+0x48/0xb0
   btf_parse_fields+0x992/0xce0
   map_create+0x591/0x770
   __sys_bpf+0x229/0x2410
   __x64_sys_bpf+0x1f/0x30
   x64_sys_call+0x199/0x9f0
   do_syscall_64+0x3b/0xc0
   entry_SYSCALL_64_after_hwframe+0x4b/0x53
  RIP: 0033:0x7fea56f2cc5d
  ......
   </TASK>
  ---[ end trace ]---

Fix it by checking the remaining info_cnt in btf_repeat_fields() before
repeating the btf fields.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.11 < 6.11.6
Linux ≫ Linux Kernel Version6.12 Updaterc1
Linux ≫ Linux Kernel Version6.12 Updaterc2
Linux ≫ Linux Kernel Version6.12 Updaterc3
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.04% 0.088
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-129 Improper Validation of Array Index

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.