CVE-2026-53032
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-06-24
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
Affected Software (11)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 520454e839710c327808c2fcc98e28cee77355fc |
| Linux | Linux | ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 0a36c1f72888bca0237295a4da19cd91821a90be |
| Linux | Linux | ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 6982653ce5f119982aa58f1af58e7bfbebf39252 |
| Linux | Linux | ab6c637ad0276e42f8acabcbc64932a6d346dab3 < da1d615ce49a47986a8864e2371a26e97861085c |
| Linux | Linux | ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad |
| Linux | Linux | af3d2e0f3a54e67806959d161e613457772babc5 |
| Linux | Linux | 4782968e0d631b0d8944dcfd4bf8fb49be087101 |
| Linux | Linux | 6.4.16 < 6.5 |
| Linux | Linux | 6.5.3 < 6.6 |
| Linux | Linux | 6.6 |
| linux | linux_kernel | 6.4.16 – 6.5 |