Linux Kernel up to 6.16.0 ipv6 fib6_info_uses_dev infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.1.147/6.6.101/6.12.41/6.15.9/6.16.0 and classified as critical. Affected by this issue is the function fib6_info_uses_dev of the component ipv6. Such manipulation leads to infinite loop. This vulnerability is listed as CVE-2025-38587. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.1.147/6.6.101/6.12.41/6.15.9/6.16.0. Affected by this issue is the function fib6_info_uses_dev of the component ipv6. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_info_uses_dev() fib6_info_uses_dev() seems to rely on RCU without an explicit protection. Like the prior fix in rt6_nlmsg_size(), we need to make sure fib6_del_route() or fib6_add_rt2node() have not removed the anchor from the list, or we risk an infinite loop.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2025-38587 since 04/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 261737 (Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1169)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 or 6.17-rc1 eliminates this vulnerability. Applying the patch bc85e62394f008fa848c4ba02c936c735a3e8ef5/9cb6de8ee144a94ae7a40bdb32560329ab7276f0/db65739d406c72776fbdbbc334be827ef05880d2/16d21816c0918f8058b5fc14cbe8595d62046e2d/e09be457b71b983a085312ff9e981f51e4ed3211/f8d8ce1b515a0a6af72b30502670a406cfb75073 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 (261737), EUVD (EUVD-2025-27916) and CERT Bund (WID-SEC-2025-1869). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
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: Infinite loop
CWE: CWE-835 / CWE-404
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: 261737
Nessus Name: Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1169)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.148/6.6.102/6.12.42/6.15.10/6.16.1/6.17-rc1
Patch: bc85e62394f008fa848c4ba02c936c735a3e8ef5/9cb6de8ee144a94ae7a40bdb32560329ab7276f0/db65739d406c72776fbdbbc334be827ef05880d2/16d21816c0918f8058b5fc14cbe8595d62046e2d/e09be457b71b983a085312ff9e981f51e4ed3211/f8d8ce1b515a0a6af72b30502670a406cfb75073

Timelineinfo

04/16/2025 CVE reserved
08/19/2025 +125 days Advisory disclosed
08/19/2025 +0 days VulDB entry created
01/08/2026 +142 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38587 (🔒)
GCVE (CVE): GCVE-0-2025-38587
GCVE (VulDB): GCVE-100-320618
EUVD: 🔒
CERT Bund: WID-SEC-2025-1869 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/19/2025 19:31
Updated: 01/08/2026 15:12
Changes: 08/19/2025 19:31 (59), 09/09/2025 18:31 (2), 09/24/2025 20:22 (7), 10/27/2025 00:47 (1), 11/01/2025 14:04 (1), 12/15/2025 23:12 (1), 01/08/2026 01:02 (11), 01/08/2026 15:12 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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