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CVE-2025-71097

25
FAUCET Score

CVE-2025-71097 describes a reference count leak in the Linux kernel's IPv4 networking stack. Specifically, when a nexthop object is deleted, associated error routes (e.g., blackhole routes) continue to hold a reference to it, preventing the nexthop object and its associated device from being properly deallocated. This vulnerability affects the Linux kernel and has been resolved. The severity of this vulnerability is low. It does not have an assigned CVSS score, and its EPSS score is extremely low, indicating a very low probability of exploitation. The attack vector is local, requiring specific network configuration and deletion actions, and the potential impact is limited to resource exhaustion or system instability rather than direct data compromise or privilege escalation. There is no evidence of active exploitation, nor is there any known exploit code available in Metasploit, Nuclei, or ExploitDB. While there are 11 community mentions, indicating some discussion, and one media article, this does not suggest widespread concern or active exploitation. The vulnerability is not listed in the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.3.1, < 5.10.248CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.15.198CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.160CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.6.120CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.7, < 6.12.64CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.11%
Probability of exploitation in next 30 days
EPSS Percentile
1.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0011 is in the 10th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (77)

microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.119.3-3 on Azure Linux 3.0Fixed in: 6.6.121.1-1
microsoftpatch availablevia msrc
Product: 20823-17084Fixed in: 6.6.121.1-1
ubuntupatch availablevia ubuntu_usn
Product: linux-fips (jammy)Fixed in: 5.15.0-173.183+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-fips (jammy)Fixed in: 5.15.0-1103.112+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-lowlatency (noble)Fixed in: 6.8.0-1051.54.1
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-fips (jammy)Fixed in: 5.15.0-1103.110+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm-5.15 (focal)Fixed in: 5.15.0-1097.100~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-tegra-5.15 (focal)Fixed in: 5.15.0-1055.55~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux (jammy)Fixed in: 5.15.0-173.183
ubuntupatch availablevia ubuntu_usn
Product: linux-aws (jammy)Fixed in: 5.15.0-1103.110
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp (jammy)Fixed in: 5.15.0-1103.112
ubuntupatch availablevia ubuntu_usn
Product: linux-gkeop (jammy)Fixed in: 5.15.0-1086.94
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm (jammy)Fixed in: 5.15.0-1097.100
ubuntupatch availablevia ubuntu_usn
Product: linux-intel-iotg (jammy)Fixed in: 5.15.0-1098.104
ubuntupatch availablevia ubuntu_usn
Product: linux-kvm (jammy)Fixed in: 5.15.0-1095.100
ubuntupatch availablevia ubuntu_usn
Product: linux-lowlatency (jammy)Fixed in: 5.15.0-173.183
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia (jammy)Fixed in: 5.15.0-1098.99
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-tegra (jammy)Fixed in: 5.15.0-1055.55
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle (jammy)Fixed in: 5.15.0-1100.106
ubuntupatch availablevia ubuntu_usn
Product: linux-xilinx-zynqmp (jammy)Fixed in: 5.15.0-1067.71
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle (noble)Fixed in: 6.8.0-1049.50
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-tegra (noble)Fixed in: 6.8.0-1022.22
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle-6.17 (noble)Fixed in: 6.17.0-1011.11~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-aws (questing)Fixed in: 6.17.0-1012.12
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle (questing)Fixed in: 6.17.0-1011.11
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime (jammy)Fixed in: 5.15.0-1102.111
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-5.15 (focal)Fixed in: 5.15.0-1103.110~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-5.15 (focal)Fixed in: 5.15.0-1103.112~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-hwe-5.15 (focal)Fixed in: 5.15.0-173.183~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-intel-iotg-5.15 (focal)Fixed in: 5.15.0-1098.104~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-lowlatency-hwe-5.15 (focal)Fixed in: 5.15.0-173.183~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle-5.15 (focal)Fixed in: 5.15.0-1100.106~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-gke (jammy)Fixed in: 5.15.0-1099.105
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-tegra-igx (jammy)Fixed in: 5.15.0-1044.44
ubuntupatch availablevia ubuntu_usn
Product: linux-intel-iot-realtime (jammy)Fixed in: 5.15.0-1094.96
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-5.15 (focal)Fixed in: 5.15.0-1110.119~20.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-6.8 (jammy)Fixed in: 6.8.0-1054.57~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-xilinx (noble)Fixed in: 6.8.0-1029.30
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-fips (noble)Fixed in: 6.8.0-1054.60+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-azure (noble)Fixed in: 6.8.0-1054.60
ubuntupatch availablevia ubuntu_usn
Product: linux-raspi (questing)Fixed in: 6.17.0-1014.14
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-6.17 (noble)Fixed in: 6.17.0-1013.13~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-oem-6.17 (noble)Fixed in: 6.17.0-1020.20
ubuntupatch availablevia ubuntu_usn
Product: linux-azure (questing)Fixed in: 6.17.0-1013.13
ubuntupatch availablevia ubuntu_usn
Product: linux-raspi (jammy)Fixed in: 5.15.0-1097.100
ubuntupatch availablevia ubuntu_usn
Product: linux-azure-fips (jammy)Fixed in: 5.15.0-1109.118+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-azure (jammy)Fixed in: 5.15.0-1109.118
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-6.8 (jammy)Fixed in: 6.8.0-1052.55~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-lowlatency-hwe-6.8 (jammy)Fixed in: 6.8.0-110.110.1~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux (noble)Fixed in: 6.8.0-110.110
ubuntupatch availablevia ubuntu_usn
Product: linux-aws (noble)Fixed in: 6.8.0-1052.55
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp (noble)Fixed in: 6.8.0-1054.57
ubuntupatch availablevia ubuntu_usn
Product: linux-gke (noble)Fixed in: 6.8.0-1050.56
ubuntupatch availablevia ubuntu_usn
Product: linux-gkeop (noble)Fixed in: 6.8.0-1037.40
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm (noble)Fixed in: 6.8.0-1051.51
ubuntupatch availablevia ubuntu_usn
Product: linux-lowlatency (noble)Fixed in: 6.8.0-110.110.1
ubuntupatch availablevia ubuntu_usn
Product: linux (questing)Fixed in: 6.17.0-22.22
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime (questing)Fixed in: 6.17.0-1010.11
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia-6.8 (jammy)Fixed in: 6.8.0-1051.54~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-nvidia (noble)Fixed in: 6.8.0-1051.54
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-fips (noble)Fixed in: 6.8.0-1052.55+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-fips (noble)Fixed in: 6.8.0-110.110+fips2
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-fips (noble)Fixed in: 6.8.0-1054.57+fips1
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime-6.8 (jammy)Fixed in: 6.8.1-1047.48~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-realtime (noble)Fixed in: 6.8.1-1047.48
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp-6.17 (noble)Fixed in: 6.17.0-1012.12~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-gcp (questing)Fixed in: 6.17.0-1012.12
ubuntupatch availablevia ubuntu_usn
Product: linux-raspi-realtime (noble)Fixed in: 6.8.0-2042.43
ubuntupatch availablevia ubuntu_usn
Product: linux-oracle-6.8 (jammy)Fixed in: 6.8.0-1049.50~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-hwe-6.8 (jammy)Fixed in: 6.8.0-110.110~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-ibm-6.8 (jammy)Fixed in: 6.8.0-1051.51~22.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-raspi (noble)Fixed in: 6.8.0-1052.56
ubuntupatch availablevia ubuntu_usn
Product: linux-aws-6.17 (noble)Fixed in: 6.17.0-1012.12~24.04.1
ubuntupatch availablevia ubuntu_usn
Product: linux-hwe-6.17 (noble)Fixed in: 6.17.0-22.22~24.04.1
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel

Vendor Advisories (30)

ubuntuUSN-8265-1

Linux kernel (NVIDIA Tegra) vulnerabilities

May 11, 2026
ubuntuUSN-8261-1

Linux kernel (Xilinx) vulnerabilities

May 7, 2026
ubuntuUSN-8260-1

Linux kernel (Azure FIPS) vulnerabilities

May 7, 2026
ubuntuUSN-8258-1

Linux kernel (Azure) vulnerabilities

May 7, 2026
ubuntuUSN-8257-1

Linux kernel (Raspberry Pi) vulnerabilities

May 7, 2026
ubuntuUSN-8245-1

Linux kernel vulnerabilities

May 7, 2026
ubuntuUSN-8243-1

Linux kernel (Azure) vulnerabilities

May 7, 2026
ubuntuUSN-8179-4

Linux kernel (GCP) vulnerabilities

May 7, 2026
ubuntuUSN-8185-2

Linux kernel (Low Latency NVIDIA) vulnerabilities

Apr 28, 2026
ubuntuUSN-8204-1

Linux kernel (Raspberry Pi Real-time) vulnerabilities

Apr 23, 2026
ubuntuUSN-8203-1

Linux kernel (Oracle) vulnerabilities

Apr 23, 2026
ubuntuUSN-8179-3

Linux kernel vulnerabilities

Apr 23, 2026
ubuntuUSN-8183-2

Linux kernel vulnerabilities

Apr 23, 2026
ubuntuUSN-8185-1

Linux kernel (NVIDIA) vulnerabilities

Apr 17, 2026
ubuntuUSN-8179-2

Linux kernel (FIPS) vulnerabilities

Apr 17, 2026
ubuntuUSN-8184-1

Linux kernel (Real-time) vulnerabilities

Apr 17, 2026
ubuntuUSN-8183-1

Linux kernel (GCP) vulnerabilities

Apr 17, 2026
ubuntuUSN-8179-1

Linux kernel vulnerabilities

Apr 16, 2026
ubuntuUSN-8177-1

Linux kernel vulnerabilities

Apr 16, 2026
ubuntuUSN-8163-2

Linux kernel (Azure) vulnerabilities

Apr 13, 2026
ubuntuUSN-8163-1

Linux kernel (Azure FIPS) vulnerabilities

Apr 9, 2026
ubuntuUSN-8141-1

Linux kernel (Raspberry Pi) vulnerabilities

Apr 1, 2026
ubuntuUSN-8096-5

Linux kernel (NVIDIA Tegra IGX) vulnerabilities

Mar 23, 2026
ubuntuUSN-8116-1

Linux kernel (Intel IoTG Real-time) vulnerabilities

Mar 23, 2026
ubuntuUSN-8096-4

Linux kernel (Real-time) vulnerabilities

Mar 17, 2026
ubuntuUSN-8096-3

Linux kernel vulnerabilities

Mar 17, 2026
ubuntuUSN-8096-2

Linux kernel (FIPS) vulnerabilities

Mar 16, 2026
ubuntuUSN-8096-1

Linux kernel vulnerabilities

Mar 16, 2026
microsoft2026-Jan/CVE-2025-71097Moderate

ipv4: Fix reference count leak when using error routes with nexthop objects

Jan 13, 2026
redhatCVE-2025-71097Moderate

kernel: Linux kernel (IPv4): Denial of Service due to reference count leak in nexthop objects

Jan 13, 2026

References

cert-portal.siemens.com / productcert/html/ssa-019113.html
git.kernel.org / stable/c/30386e090c49e803c0616a7147e43409c32a2b0e
Patch
git.kernel.org / stable/c/33ff5c207c873215e54e6176624ed57423cb7dea
Patch
git.kernel.org / stable/c/5979338c83012110ccd45cae6517591770bfe536
Patch
git.kernel.org / stable/c/5de7ad7e18356e39e8fbf7edd185a5faaf4f385a
Patch
git.kernel.org / stable/c/ac782f4e3bfcde145b8a7f8af31d9422d94d172a
Patch
git.kernel.org / stable/c/e3fc381320d04e4a74311e576a86cac49a16fc43
Patch
git.kernel.org / stable/c/ee4183501ea556dca31f5ffd8690aa9fd25b609f
Patch