Linux Kernel up to 6.12.41/6.15.9/6.16.0 find_used_callee_regs initialization

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.41/6.15.9/6.16.0 and classified as problematic. Affected by this vulnerability is the function find_used_callee_regs. This manipulation causes initialization. This vulnerability is tracked as CVE-2025-38586. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.12.41/6.15.9/6.16.0. Affected by this vulnerability is the function find_used_callee_regs. The manipulation with an unknown input leads to a initialization vulnerability. The CWE definition for the vulnerability is CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix fp initialization for exception boundary In the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPF program, find_used_callee_regs() is not called because for a program acting as exception boundary, all callee saved registers are saved. find_used_callee_regs() sets `ctx->fp_used = true;` when it sees FP being used in any of the instructions. For programs acting as exception boundary, ctx->fp_used remains false even if frame pointer is used by the program and therefore, FP is not set-up for such programs in the prologue. This can cause the kernel to crash due to a pagefault. Fix it by setting ctx->fp_used = true for exception boundary programs as fp is always saved in such programs.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2025-38586 since 04/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 260104 (Linux Distros Unpatched Vulnerability : CVE-2025-38586), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.42, 6.15.10, 6.16.1 or 6.17-rc1 eliminates this vulnerability. Applying the patch 0dbef493cae7d451f740558665893c000adb2321/e23184725dbb72d5d02940222eee36dbba2aa422/1ce30231e0a2c8c361ee5f8f7f265fc17130adce/b114fcee766d5101eada1aca7bb5fd0a86c89b35 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (260104) and CERT Bund (WID-SEC-2025-1869). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 260104
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-38586

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.42/6.15.10/6.16.1/6.17-rc1
Patch: 0dbef493cae7d451f740558665893c000adb2321/e23184725dbb72d5d02940222eee36dbba2aa422/1ce30231e0a2c8c361ee5f8f7f265fc17130adce/b114fcee766d5101eada1aca7bb5fd0a86c89b35

Timelineinfo

04/16/2025 CVE reserved
08/19/2025 +125 days Advisory disclosed
08/19/2025 +0 days VulDB entry created
12/15/2025 +118 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38586 (🔒)
GCVE (CVE): GCVE-0-2025-38586
GCVE (VulDB): GCVE-100-320617
CERT Bund: WID-SEC-2025-1869 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/19/2025 19:31
Updated: 12/15/2025 22:58
Changes: 08/19/2025 19:31 (57), 09/01/2025 22:37 (2), 09/24/2025 20:22 (7), 10/27/2025 00:47 (1), 11/01/2025 14:04 (1), 11/26/2025 19:44 (11), 12/15/2025 22:58 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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