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CVE-2026-72127
netdev-genl: report NAPI thread PID in the caller's pid namespace
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: netdev-genl: report NAPI thread PID in the caller's pid namespace netdev_nl_napi_fill_one() reports the NAPI kthread PID in NETDEV_A_NAPI_PID using task_pid_nr(), which returns the PID in the initial pid namespace. NETDEV_CMD_NAPI_GET does not have GENL_ADMIN_PERM and the netdev genl family is netnsok, so a caller in a child pid namespace can issue it. That caller then sees the kthread's global PID, even though the kthread is not visible in its pid namespace, where the value should be 0. Translate the PID through the caller's pid namespace, the same way commit 3799c2570982 ("io_uring/fdinfo: translate SqThread PID through caller's pid_ns") did for the io_uring SQPOLL thread. The doit and dumpit paths both run synchronously in the caller's context, so task_active_pid_ns(current) is the caller's pid namespace.

Details
INFO

Published Date :

Aug. 15, 2026, 6:21 a.m.

Last Modified :

Aug. 17, 2026, 6:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-72127 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Apply Linux kernel patches to correctly report NAPI thread PIDs across PID namespaces.
  • Apply the security patch for the Linux kernel.
  • Update the Linux kernel to the latest stable version.
  • Reboot the system after patching.
  • Verify PID reporting in child namespaces.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-72127.

URL Resource
https://git.kernel.org/stable/c/1f24c0d01db214c9e661915e9972404c96ca73c0
https://git.kernel.org/stable/c/5e4c8e08ce95730c87d6ada0bdbe1131a3c06393
https://git.kernel.org/stable/c/fb18095389fe81f140d39585a2624aca9d42227e
https://git.kernel.org/stable/c/fd750b694f1f9e1ecb8ca19314e4e21edbb15f42
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72127 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-72127 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-72127 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-72127 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fb18095389fe81f140d39585a2624aca9d42227e', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '5e4c8e08ce95730c87d6ada0bdbe1131a3c06393', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fd750b694f1f9e1ecb8ca19314e4e21edbb15f42', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '1f24c0d01db214c9e661915e9972404c96ca73c0', 'versionType': 'git'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fb18095389fe81f140d39585a2624aca9d42227e', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '5e4c8e08ce95730c87d6ada0bdbe1131a3c06393', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fd750b694f1f9e1ecb8ca19314e4e21edbb15f42', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '1f24c0d01db214c9e661915e9972404c96ca73c0', 'versionType': 'git'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fb18095389fe81f140d39585a2624aca9d42227e', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '5e4c8e08ce95730c87d6ada0bdbe1131a3c06393', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': 'fd750b694f1f9e1ecb8ca19314e4e21edbb15f42', 'versionType': 'git'}, {'status': 'affected', 'version': 'db4704f4e4dfce835e934609fca735a648ce26e8', 'lessThan': '1f24c0d01db214c9e661915e9972404c96ca73c0', 'versionType': 'git'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/core/netdev-genl.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: netdev-genl: report NAPI thread PID in the caller's pid namespace netdev_nl_napi_fill_one() reports the NAPI kthread PID in NETDEV_A_NAPI_PID using task_pid_nr(), which returns the PID in the initial pid namespace. NETDEV_CMD_NAPI_GET does not have GENL_ADMIN_PERM and the netdev genl family is netnsok, so a caller in a child pid namespace can issue it. That caller then sees the kthread's global PID, even though the kthread is not visible in its pid namespace, where the value should be 0. Translate the PID through the caller's pid namespace, the same way commit 3799c2570982 ("io_uring/fdinfo: translate SqThread PID through caller's pid_ns") did for the io_uring SQPOLL thread. The doit and dumpit paths both run synchronously in the caller's context, so task_active_pid_ns(current) is the caller's pid namespace.
    Added Reference https://git.kernel.org/stable/c/1f24c0d01db214c9e661915e9972404c96ca73c0
    Added Reference https://git.kernel.org/stable/c/5e4c8e08ce95730c87d6ada0bdbe1131a3c06393
    Added Reference https://git.kernel.org/stable/c/fb18095389fe81f140d39585a2624aca9d42227e
    Added Reference https://git.kernel.org/stable/c/fd750b694f1f9e1ecb8ca19314e4e21edbb15f42
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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