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🛡️ CVE-2024-50161 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

bpf: Check the remaining info_cnt before repeating btf fields

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-50161 is recorded against 2 packages.

  • kernel (from 6.11.0 up to 6.11.6)
  • linux-kernel

Timeline and source

Published on 7 November 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-50161 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-11-07
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.11.0 6.11.6
linux-kernel — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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