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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-53032

bpf: Fix NULL deref in map_kptr_match_type for scalar regs

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix NULL deref in map_kptr_match_type for scalar regs Commit ab6c637ad027 ("bpf: Fix a bpf_kptr_xchg() issue with local kptr") refactored map_kptr_match_type() to branch on btf_is_kernel() before checking base_type(). A scalar register stored into a kptr slot has no btf, so the btf_is_kernel(reg->btf) call dereferences NULL. Move the base_type() != PTR_TO_BTF_ID guard before any reg->btf access.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ab6c637ad0276e42f8acabcbc64932a6d346dab3 to < 520454e839710c327808c2fcc98e28cee77355fcaffected
  • ab6c637ad0276e42f8acabcbc64932a6d346dab3 to < 0a36c1f72888bca0237295a4da19cd91821a90beaffected
  • ab6c637ad0276e42f8acabcbc64932a6d346dab3 to < 6982653ce5f119982aa58f1af58e7bfbebf39252affected
  • ab6c637ad0276e42f8acabcbc64932a6d346dab3 to < da1d615ce49a47986a8864e2371a26e97861085caffected
  • ab6c637ad0276e42f8acabcbc64932a6d346dab3 to < 4d0a375887ab4d49e4da1ff10f9606cab8f7c3adaffected
  • af3d2e0f3a54e67806959d161e613457772babc5affected
  • 4782968e0d631b0d8944dcfd4bf8fb49be087101affected
  • 6.4.16 to < 6.5affected
  • 6.5.3 to < 6.6affected

Linux Linux

Default version status: affected

  • 6.6affected
  • 0 to < 6.6unaffected
  • 6.6.141 to ≤ 6.6.*unaffected
  • 6.12.91 to ≤ 6.12.*unaffected
  • 6.18.33 to ≤ 6.18.*unaffected
  • 7.0.10 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References