CVE-2026-43443

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: amd: acp-mach-common: Add missing error check for clock acquisition The acp_card_rt5682_init() and acp_card_rt5682s_init() functions did not check the return values of clk_get(). This could lead to a kernel crash when the invalid pointers are later dereferenced by clock core functions. Fix this by: 1. Changing clk_get() to the device-managed devm_clk_get(). 2. Adding IS_ERR() checks immediately after each clock acquisition.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* - VULNERABLE

Linux Kernel (受影响版本请参考参考链接中的Git提交信息)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * PoC Concept: Triggering the vulnerable code path
 * This involves initializing the sound card where the clk_get fails.
 */

#include <linux/module.h>
#include <linux/platform_device.h>

// Simulating the vulnerable initialization flow
static int vulnerable_init(struct device *dev) {
    struct clk *clk;
    
    // Vulnerability: clk_get return value not checked
    clk = clk_get(dev, "rt5682_mclk");
    
    // If clk_get fails, clk is an error pointer.
    // The following dereference causes a Kernel Panic/Oops.
    // clk_prepare_enable(clk); 
    
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43443
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43443
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43443/
[4] VulDB https://vuldb.com/cve/CVE-2026-43443
[5] https://git.kernel.org/stable/c/0cee68fb7f4cf1562e067c5a82d25062a973b0d0
[6] https://git.kernel.org/stable/c/30c64fb9839949f085c8eb55b979cbd8a4c51f00

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43443", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T15:16:56.780", "lastModified": "2026-05-21T17:09:16.520", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: amd: acp-mach-common: Add missing error check for clock acquisition\n\nThe acp_card_rt5682_init() and acp_card_rt5682s_init() functions did not\ncheck the return values of clk_get(). This could lead to a kernel crash\nwhen the invalid pointers are later dereferenced by clock core\nfunctions.\n\nFix this by:\n1. Changing clk_get() to the device-managed devm_clk_get().\n2. Adding IS_ERR() checks immediately after each clock acquisition."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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": "[email protected]", "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": "5.16", "versionEndExcluding": "6.19.9", "matchCriteriaId": "72993C68-4B53-4F53-8505-6A00D983861D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0cee68fb7f4cf1562e067c5a82d25062a973b0d0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/30c64fb9839949f085c8eb55b979cbd8a4c51f00", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}