CVE-2026-53032 (GCVE-0-2026-53032)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
EPSS
VEX
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)
Assigner
References
Impacted products
2 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 | |
| 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 |
{
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"version": "7.0.10",
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},
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}
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}
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"title": "bpf: Fix NULL deref in map_kptr_match_type for scalar regs",
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"product_status:fixed": "1",
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"source": "Microsoft CSAF VEX",
"status": "final",
"title": "bpf: Fix NULL deref in map_kptr_match_type for scalar regs",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53032.json",
"version": "2"
},
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A scalar register stored into a kptr\\nslot has no btf, so the btf_is_kernel(reg-\u003ebtf) call dereferences\\nNULL.\\n\\nMove the base_type() != PTR_TO_BTF_ID guard before any reg-\u003ebtf\\naccess.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/bpf/verifier.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ab6c637ad0276e42f8acabcbc64932a6d346dab3\",\"lessThan\":\"520454e839710c327808c2fcc98e28cee77355fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ab6c637ad0276e42f8acabcbc64932a6d346dab3\",\"lessThan\":\"0a36c1f72888bca0237295a4da19cd91821a90be\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ab6c637ad0276e42f8acabcbc64932a6d346dab3\",\"lessThan\":\"6982653ce5f119982aa58f1af58e7bfbebf39252\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ab6c637ad0276e42f8acabcbc64932a6d346dab3\",\"lessThan\":\"da1d615ce49a47986a8864e2371a26e97861085c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ab6c637ad0276e42f8acabcbc64932a6d346dab3\",\"lessThan\":\"4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"af3d2e0f3a54e67806959d161e613457772babc5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4782968e0d631b0d8944dcfd4bf8fb49be087101\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.4.16\",\"lessThan\":\"6.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.5.3\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/bpf/verifier.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.16\",\"versionEndExcluding\":\"6.5\",\"matchCriteriaId\":\"A5099559-2D15-42A5-A561-71B34FEFF36F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.3\",\"versionEndExcluding\":\"6.6.141\",\"matchCriteriaId\":\"D7743513-2F73-438A-9F46-C52F85BBB5FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.91\",\"matchCriteriaId\":\"C918746B-DE6F-448F-A93E-A04C5481688D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.33\",\"matchCriteriaId\":\"96D99E49-380D-43AB-BDBA-25C3AD018A9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.10\",\"matchCriteriaId\":\"A13475D2-59BF-4716-94B5-7C1D239A2CF4\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a36c1f72888bca0237295a4da19cd91821a90be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4d0a375887ab4d49e4da1ff10f9606cab8f7c3ad\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/520454e839710c327808c2fcc98e28cee77355fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6982653ce5f119982aa58f1af58e7bfbebf39252\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da1d615ce49a47986a88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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-14T19:45:42+00:00",
"cve": "CVE-2026-53032",
"id": "CVE-2026-53032",
"initial_release_date": "2026-06-24T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: bpf: Fix NULL deref in map_kptr_match_type for scalar regs",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53032.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-10T16:59:20Z",
"cve": "CVE-2026-53032",
"id": "CVE-2026-53032",
"initial_release_date": "2026-06-26T02:13:06Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "453",
"product_status:known_not_affected": "279",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-53032",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53032.json",
"version": "11"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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