CVE-2026-46098 Details
Description
In the Linux kernel, the following vulnerability has been resolved: net: caif: clear client service pointer on teardown `caif_connect()` can tear down an existing client after remote shutdown by calling `caif_disconnect_client()` followed by `caif_free_client()`. `caif_free_client()` releases the service layer referenced by `adap_layer->dn`, but leaves that pointer stale. When the socket is later destroyed, `caif_sock_destructor()` calls `caif_free_client()` again and dereferences the freed service pointer. Clear the client/service links before releasing the service object so repeated teardown becomes harmless.
A vulnerability exists in the Linux kernel's CAIF (Communication Access Interface Framework) implementation, specifically within the client service teardown process. The issue arises because the function 'caif_free_client()' releases the service layer referenced by 'adap_layer->dn' but leaves the pointer stale. This can lead to a double-free situation when the socket is destroyed, as 'caif_sock_destructor()' will attempt to dereference a freed pointer. The vulnerability affects the stable versions of the Linux kernel.
The vulnerability has been addressed by clearing the client/service links before releasing the service object, ensuring that repeated teardowns do not cause issues. Users should upgrade to the latest stable version of the Linux kernel where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3ac6db584d9d420267bb8413115707eeec76d9cf | kernel.org | Patch |
| https://git.kernel.org/stable/c/63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7ef97d4675b05a103648bd9244d91dff7d8c08b0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/914c6456fcfc21a3d553945dff62fd1621d6155d | kernel.org | Patch |
| https://git.kernel.org/stable/c/a4b191ddc12c55ddb62feb096536f819f384d6f1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cffca7a18b8f9de7c3d3013a1f5740c412b2a501 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e16859f3f4426fa349bc5519d582a93d28f5a15d | kernel.org | Patch |
| https://git.kernel.org/stable/c/f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.0, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.140 >= 6.7, < 6.12.86 >= 6.13, < 6.18.27 >= 6.19, < 7.0.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |