CVE-2026-43432 (GCVE-0-2026-43432)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-23 16:06
VLAI
EPSS
VEX
Title
usb: xhci: Fix memory leak in xhci_disable_slot()
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: xhci: Fix memory leak in xhci_disable_slot()
xhci_alloc_command() allocates a command structure and, when the
second argument is true, also allocates a completion structure.
Currently, the error handling path in xhci_disable_slot() only frees
the command structure using kfree(), causing the completion structure
to leak.
Use xhci_free_command() instead of kfree(). xhci_free_command() correctly
frees both the command structure and the associated completion structure.
Since the command structure is allocated with zero-initialization,
command->in_ctx is NULL and will not be erroneously freed by
xhci_free_command().
This bug was found using an experimental static analysis tool we are
developing. The tool is based on the LLVM framework and is specifically
designed to detect memory management issues. It is currently under
active development and not yet publicly available, but we plan to
open-source it after our research is published.
The bug was originally detected on v6.13-rc1 using our static analysis
tool, and we have verified that the issue persists in the latest mainline
kernel.
We performed build testing on x86_64 with allyesconfig using GCC=11.4.0.
Since triggering these error paths in xhci_disable_slot() requires specific
hardware conditions or abnormal state, we were unable to construct a test
case to reliably trigger these specific error paths at runtime.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
fee8be5bde562d4f5f9a100ca80c6d7072ed34c8 , < 1e800e26d54ccf2ddf2ea6d6cbe021c804d8aa62
(git)
Affected: 02d5a2a48bb44e7404b794df87e57588b2fd604e , < 6288baf0c8c4dcfbf206773aede9c1f2269cec28 (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < 46aea90763832cd6e9b0c2e1c00e6a9512156d4b (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < 2e2baa8fb5aa4d080cbfeb84c51eff797529f413 (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < 807e4fb5140c73eb5dba1e399a990db5c1f3cdf8 (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < c65f1b840ab8ce72ba68f1b63bab7960f8fdfa89 (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < 078b446efc0f5e496c31bccb72b98af979963a83 (git) Affected: 7faac1953ed1f658f719cdf7bb7303fa5eef822c , < c1c8550e70401159184130a1afc6261db01fc0ce (git) Affected: cc7c2818c71ebace207df40cc586c8c74e3d1a59 (git) Affected: ec0cddcc2454ab08193beb473978f8f8889b7e24 (git) Affected: 5.10.85 , < 5.10.253 (semver) Affected: 5.15.8 , < 5.15.203 (semver) Affected: 4.19.221 , < 4.20 (semver) Affected: 5.4.165 , < 5.5 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.16
Unaffected: 0 , < 5.16 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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}
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The tool is based on the LLVM framework and is specifically\\ndesigned to detect memory management issues. It is currently under\\nactive development and not yet publicly available, but we plan to\\nopen-source it after our research is published.\\n\\nThe bug was originally detected on v6.13-rc1 using our static analysis\\ntool, and we have verified that the issue persists in the latest mainline\\nkernel.\\n\\nWe performed build testing on x86_64 with allyesconfig using GCC=11.4.0.\\nSince triggering these error paths in xhci_disable_slot() requires specific\\nhardware conditions or abnormal state, we were unable to construct a test\\ncase to reliably trigger these specific error paths at runtime.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/host/xhci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"fee8be5bde562d4f5f9a100ca80c6d7072ed34c8\",\"lessThan\":\"1e800e26d54ccf2ddf2ea6d6cbe021c804d8aa62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02d5a2a48bb44e7404b794df87e57588b2fd604e\",\"lessThan\":\"6288baf0c8c4dcfbf206773aede9c1f2269cec28\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"46aea90763832cd6e9b0c2e1c00e6a9512156d4b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"2e2baa8fb5aa4d080cbfeb84c51eff797529f413\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"807e4fb5140c73eb5dba1e399a990db5c1f3cdf8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"c65f1b840ab8ce72ba68f1b63bab7960f8fdfa89\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"078b446efc0f5e496c31bccb72b98af979963a83\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7faac1953ed1f658f719cdf7bb7303fa5eef822c\",\"lessThan\":\"c1c8550e70401159184130a1afc6261db01fc0ce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cc7c2818c71ebace207df40cc586c8c74e3d1a59\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ec0cddcc2454ab08193beb473978f8f8889b7e24\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.85\",\"lessThan\":\"5.10.253\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.8\",\"lessThan\":\"5.15.203\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.221\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.165\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/host/xhci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.19\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.9\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"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-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.221\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"901C8646-1860-4CD8-B70D-C02E4CAD5E2F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.165\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"86894268-9F63-47BD-A035-219EBC359D4E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.85\",\"versionEndExcluding\":\"5.10.253\",\"matchCriteriaId\":\"C5B6032E-F367-42A0-9B64-BE8D27AA93C8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.8\",\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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T11:51:55+00:00",
"cve": "CVE-2026-43432",
"id": "CVE-2026-43432",
"initial_release_date": "2026-05-08T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: usb: xhci: Fix memory leak in xhci_disable_slot()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43432.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T17:04:19Z",
"cve": "CVE-2026-43432",
"id": "CVE-2026-43432",
"initial_release_date": "2026-05-11T14:13:36Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "554",
"product_status:known_not_affected": "164",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-43432",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43432.json",
"version": "9"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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