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CVE-2026-53032 (GCVE-0-2026-53032)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
Title
bpf: Fix NULL deref in map_kptr_match_type for scalar regs
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ab6c637ad0276e42f8acabcbc64932a6d346dab3 , < 520454e839710c327808c2fcc98e28cee77355fc (git)
Affected: ab6c637ad0276e42f8acabcbc64932a6d346dab3 , < 0a36c1f72888bca0237295a4da19cd91821a90be (git)
Affected: ab6c637ad0276e42f8acabcbc64932a6d346dab3 , < 6982653ce5f119982aa58f1af58e7bfbebf39252 (git)
Affected: ab6c637ad0276e42f8acabcbc64932a6d346dab3 , < da1d615ce49a47986a8864e2371a26e97861085c (git)
Affected: ab6c637ad0276e42f8acabcbc64932a6d346dab3 , < 4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad (git)
Affected: af3d2e0f3a54e67806959d161e613457772babc5 (git)
Affected: 4782968e0d631b0d8944dcfd4bf8fb49be087101 (git)
Affected: 6.4.16 , < 6.5 (semver)
Affected: 6.5.3 , < 6.6 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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