CVE-2026-43196

Description

In the Linux kernel, the following vulnerability has been resolved: soc: ti: pruss: Fix double free in pruss_clk_mux_setup() In the pruss_clk_mux_setup(), the devm_add_action_or_reset() indirectly calls pruss_of_free_clk_provider(), which calls of_node_put(clk_mux_np) on the error path. However, after the devm_add_action_or_reset() returns, the of_node_put(clk_mux_np) is called again, causing a double free. Fix by returning directly, to avoid the duplicate of_node_put().

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

Linux Kernel (stable branches prior to commit 04dbbb18)

Linux Kernel (stable branches prior to commit 24c40076)

Linux Kernel (stable branches prior to commit 69aa67c1)

PoC / Exploit Code

⚠ For Security Research Only

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

python

/*
 * Conceptual PoC to demonstrate the trigger path.
 * This requires a system with TI PRUSS hardware.
 */

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

// Simulating the vulnerable logic flow
void simulate_vulnerability(struct device_node *np) {
    // This represents devm_add_action_or_reset calling pruss_of_free_clk_provider
    of_node_put(np); 
    
    // This represents the subsequent erroneous of_node_put in the original code
    of_node_put(np); // Double Free occurs here
}

// Actual exploit would involve loading a module that forces the
// pruss_clk_mux_setup() function to execute its error path.

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43196
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43196
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43196/
[4] VulDB https://vuldb.com/cve/CVE-2026-43196
[5] https://git.kernel.org/stable/c/04dbbb18cc9c8795c9ff47d8994bc03ebfef9d68
[6] https://git.kernel.org/stable/c/24c40076e3bc3d73c839c886d6bda1da6c4d9b93
[7] https://git.kernel.org/stable/c/69aa67c1e22d13e9aad4b08c86304ad8e743dcab
[8] https://git.kernel.org/stable/c/80db65d4acfb9ff12d00172aed39ea8b98261aad
[9] https://git.kernel.org/stable/c/818cf66d91c8ef09b01664a12d5f4ea786d64396
[10] https://git.kernel.org/stable/c/b7db9953c2f8da37de498198623b05b46f8e2ca0
[11] https://git.kernel.org/stable/c/dbda01bf2dfe5af33163e1e5fca1b82b619c2803
[12] https://git.kernel.org/stable/c/e113339cc7d23be4948891f3a702e9dce5b47035

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43196", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:38.607", "lastModified": "2026-05-11T20:11:30.810", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoc: ti: pruss: Fix double free in pruss_clk_mux_setup()\n\nIn the pruss_clk_mux_setup(), the devm_add_action_or_reset() indirectly\ncalls pruss_of_free_clk_provider(), which calls of_node_put(clk_mux_np)\non the error path. However, after the devm_add_action_or_reset()\nreturns, the of_node_put(clk_mux_np) is called again, causing a double\nfree.\n\nFix by returning directly, to avoid the duplicate of_node_put()."}], "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:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-415"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.10.252", "matchCriteriaId": "FB2C2DAE-FC61-4054-BF05-406CAE1F7C71"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.202", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.165", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.128", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/04dbbb18cc9c8795c9ff47d8994bc03ebfef9d68", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/24c40076e3bc3d73c839c886d6bda1da6c4d9b93", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/69aa67c1e22d13e9aad4b08c86304ad8e743dcab", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/80db65d4acfb9ff12d00172aed39ea8b98261aad", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/818cf66d91c8ef09b01664a12d5f4ea786d64396", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b7db9953c2f8da37de498198623b05b46f8e2ca0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/dbda01bf2dfe5af33163e1e5fca1b82b619c2803", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e113339cc7d23be4948891f3a702e9dce5b47035", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}