CVE-2026-23443 (GCVE-0-2026-23443)
Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-05-11 22:07
VLAI
EPSS
VEX
Title
ACPI: processor: Fix previous acpi_processor_errata_piix4() fix
Summary
In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: Fix previous acpi_processor_errata_piix4() fix
After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference
in acpi_processor_errata_piix4()"), device pointers may be dereferenced
after dropping references to the device objects pointed to by them,
which may cause a use-after-free to occur.
Moreover, debug messages about enabling the errata may be printed
if the errata flags corresponding to them are unset.
Address all of these issues by moving message printing to the points
in the code where the errata flags are set.
Severity
5.5 (Medium)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5 , < 68408e8f9e366ad9850a66ac65cb569f13bf6cd4
(git)
Affected: ad86ac604f8391c0212a91412d4f764c7a85f254 , < 2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2 (git) Affected: 01e8751b37a366b1ca561add0042f2ceb18c03bf , < edf4c2aaee08e8fd503fbae705c801e92a0b55d7 (git) Affected: b803811485ac0b2f774b6bf3abc8b999ba3b7033 , < e0c470049344e9346fff79d7e2362212c216665e (git) Affected: 29f60d3d06818d40118a30d663231f027ae87a05 , < 98473309a36acc271009b85e0bb53a4c0dddf5c2 (git) Affected: 0398b641be2b66c2fc7e0163c606ef19372e7ad5 , < 8583f62259e1b315d5239371adfb36939cdab741 (git) Affected: f132e089fe89cadc2098991f0a3cb05c3f824ac6 , < bf504b229cb8d534eccbaeaa23eba34c05131e25 (git) |
guessed | |
| Linux | Linux |
Affected:
5.15.202 , < 5.15.203
(semver)
Affected: 6.1.165 , < 6.1.167 (semver) Affected: 6.6.128 , < 6.6.130 (semver) Affected: 6.12.75 , < 6.12.78 (semver) Affected: 6.18.16 , < 6.18.20 (semver) Affected: 6.19.6 , < 6.19.10 (semver) |
guessed |
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}
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"id": "CVE-2026-23443",
"lastModified": "2026-07-24T21:10:00.143",
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"baseScore": 5.5,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"version": "3.1"
},
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"value": "CWE-476"
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"aggregate_severity": "None",
"current_release_date": "2026-06-28T10:58:51+00:00",
"cve": "CVE-2026-23443",
"id": "CVE-2026-23443",
"initial_release_date": "2026-04-03T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: ACPI: processor: Fix previous acpi_processor_errata_piix4() fix",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23443.json",
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}
}
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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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