Linux Kernel up to 6.16.1 LoongArch bpf_int_jit_compile initialization

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

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.1.148/6.6.102/6.12.42/6.15.10/6.16.1. It has been rated as critical. Affected by this vulnerability is the function bpf_int_jit_compile of the component LoongArch. The manipulation leads to initialization. This vulnerability is listed as CVE-2025-38723. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.1.148/6.6.102/6.12.42/6.15.10/6.16.1. This issue affects the function bpf_int_jit_compile of the component LoongArch. The manipulation with an unknown input leads to a initialization vulnerability. Using CWE to declare the problem leads to 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: LoongArch: BPF: Fix jump offset calculation in tailcall The extra pass of bpf_int_jit_compile() skips JIT context initialization which essentially skips offset calculation leaving out_offset = -1, so the jmp_offset in emit_bpf_tail_call is calculated by "#define jmp_offset (out_offset - (cur_offset))" is a negative number, which is wrong. The final generated assembly are as follow. 54: bgeu $a2, $t1, -8 # 0x0000004c 58: addi.d $a6, $s5, -1 5c: bltz $a6, -16 # 0x0000004c 60: alsl.d $t2, $a2, $a1, 0x3 64: ld.d $t2, $t2, 264 68: beq $t2, $zero, -28 # 0x0000004c Before apply this patch, the follow test case will reveal soft lock issues. cd tools/testing/selftests/bpf/ ./test_progs --allow=tailcalls/tailcall_bpf2bpf_1 dmesg: watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [test_progs:25056]

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-38723 since 04/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 261552 (Linux Distros Unpatched Vulnerability : CVE-2025-38723), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.149, 6.6.103, 6.12.43, 6.15.11, 6.16.2 or 6.17-rc1 eliminates this vulnerability. Applying the patch 1a782fa32e644aa9fbae6c8488f3e61221ac96e1/17c010fe45def335fe03a0718935416b04c7f349/f83d469e16bb1f75991ca67c56786fb2aaa42bea/f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f/9262e3e04621558e875eb5afb5e726b648cd5949/cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3 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 (261552) and CERT Bund (WID-SEC-2025-1976). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

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

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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 261552
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-38723

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.149/6.6.103/6.12.43/6.15.11/6.16.2/6.17-rc1
Patch: 1a782fa32e644aa9fbae6c8488f3e61221ac96e1/17c010fe45def335fe03a0718935416b04c7f349/f83d469e16bb1f75991ca67c56786fb2aaa42bea/f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f/9262e3e04621558e875eb5afb5e726b648cd5949/cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3

Timelineinfo

04/16/2025 CVE reserved
09/04/2025 +141 days Advisory disclosed
09/04/2025 +0 days VulDB entry created
02/10/2026 +159 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38723 (🔒)
GCVE (CVE): GCVE-0-2025-38723
GCVE (VulDB): GCVE-100-322553
CERT Bund: WID-SEC-2025-1976 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/04/2025 18:28
Updated: 02/10/2026 08:29
Changes: 09/04/2025 18:28 (59), 09/05/2025 20:45 (7), 09/07/2025 22:45 (2), 10/08/2025 19:59 (1), 12/10/2025 01:38 (1), 01/09/2026 06:57 (10), 01/15/2026 03:13 (1), 02/10/2026 08:29 (1)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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