Improper Input Validation Affecting kernel-modules-internal package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELMODULESINTERNAL-10054404
  • published6 May 2025
  • disclosed5 May 2025

Introduced: 5 May 2025

CVE-2024-58100  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 kernel-modules-internal.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-modules-internal package and not the kernel-modules-internal package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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

bpf: check changes_pkt_data property for extension programs

When processing calls to global sub-programs, verifier decides whether to invalidate all packet pointers in current state depending on the changes_pkt_data property of the global sub-program.

Because of this, an extension program replacing a global sub-program must be compatible with changes_pkt_data property of the sub-program being replaced.

This commit:

  • adds changes_pkt_data flag to struct bpf_prog_aux:

    • this flag is set in check_cfg() for main sub-program;
    • in jit_subprogs() for other sub-programs;
  • modifies bpf_check_attach_btf_id() to check changes_pkt_data flag;

  • moves call to check_attach_btf_id() after the call to check_cfg(), because it needs changes_pkt_data flag to be set:

    bpf_check: ... ...

    • check_attach_btf_id resolve_pseudo_ldimm64 resolve_pseudo_ldimm64 --> bpf_prog_is_offloaded bpf_prog_is_offloaded check_cfg check_cfg + check_attach_btf_id ... ...

The following fields are set by check_attach_btf_id():

  • env->ops
  • prog->aux->attach_btf_trace
  • prog->aux->attach_func_name
  • prog->aux->attach_func_proto
  • prog->aux->dst_trampoline
  • prog->aux->mod
  • prog->aux->saved_dst_attach_type
  • prog->aux->saved_dst_prog_type
  • prog->expected_attach_type

Neither of these fields are used by resolve_pseudo_ldimm64() or bpf_prog_offload_verifier_prep() (for netronome and netdevsim drivers), so the reordering is safe.

CVSS Base Scores

version 3.1