CVE-2026-45951 Details
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free of BTF object Refcounting in the check_pseudo_btf_id() function is incorrect: the __check_pseudo_btf_id() function might get called with a zero refcounted btf. Fix this, and patch related code accordingly. v3: rephrase a comment (AI) v2: fix a refcount leak introduced in v1 (AI)
A use-after-free vulnerability has been identified in the Linux kernel's BPF subsystem, specifically within the BTF (BPF Type Format) object handling. The issue arises in the 'check_pseudo_btf_id()' function, where the reference counting for BTF objects is managed incorrectly. This flaw can lead to the function being called with a BTF object that has a zero reference count, potentially causing memory management issues.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version are available on the official Linux kernel website.
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/9ff46ffeecdb1802d6e26183177935b948a12e7f | kernel.org | Patch |
| https://git.kernel.org/stable/c/ccd2d799ed4467c07f5ee18c2f5c59bcc990822c | kernel.org | Patch |
| https://git.kernel.org/stable/c/eac65c272f3b49021a843cba5107d63627395e0e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.14, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| May 30, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |