CVE-2026-53032
bpf: Fix NULL deref in map_kptr_match_type for scalar regs
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 24, 2026 |
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Affected Versions
Linux / Linux
ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 520454e839710c327808c2fcc98e28cee77355fc ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 0a36c1f72888bca0237295a4da19cd91821a90be ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 6982653ce5f119982aa58f1af58e7bfbebf39252 ab6c637ad0276e42f8acabcbc64932a6d346dab3 < da1d615ce49a47986a8864e2371a26e97861085c ab6c637ad0276e42f8acabcbc64932a6d346dab3 < 4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad af3d2e0f3a54e67806959d161e613457772babc5 4782968e0d631b0d8944dcfd4bf8fb49be087101 6.4.16 < 6.5 6.5.3 < 6.6
Linux / Linux
6.6
References
git.kernel.org: https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc git.kernel.org: https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be git.kernel.org: https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252 git.kernel.org: https://git.kernel.org/stable/c/da1d615ce49a47986a8864e2371a26e97861085c git.kernel.org: https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad