CVE-2026-53075
ppp: require CAP_NET_ADMIN in target netns for unattached ioctls
Description
In the Linux kernel, the following vulnerability has been resolved: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls /dev/ppp open is currently authorized against file->f_cred->user_ns, while unattached administrative ioctls operate on current->nsproxy->net_ns. As a result, a local unprivileged user can create a new user namespace with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace, and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against an inherited network namespace. Require CAP_NET_ADMIN in the user namespace that owns the target network namespace before handling unattached PPP administrative ioctls. This preserves normal pppd operation in the network namespace it is actually privileged in, while rejecting the userns-only inherited-netns case.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 21, 2026, 6:05 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to include the fix.
- Verify CAP_NET_ADMIN is enforced in the correct namespace.
- Apply security patches promptly to prevent privilege escalation.
Public PoC/Exploit Available at Github
CVE-2026-53075 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-53075.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53075 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-2026-53075
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).
POC of CVE-2026-53075
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53075 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53075 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.
-
Initial Analysis by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.30 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c9edd90c57ae23692fff6b049fdfa4572a9fd532 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 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': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': 'c9edd90c57ae23692fff6b049fdfa4572a9fd532', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '5080e188c914110034bbc569d5cfa2f06204681d', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '67e901e28d177ac9a9bed76d69ce3471e704a89e', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '954745d0223e7caec917c0b2d1a889ff56fa6e54', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '3b2c2157dc2afc5c17cd7238afefca92f1ef330e', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '5013be175c7ffd8b39efbc3c9c4db5b10b85fea8', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '1a8a51ce85075a56a743b6f142606dd2696a391c', 'versionType': 'git'}, {'status': 'affected', 'version': '273ec51dd7ceaa76e038875d85061ec856d8905e', 'lessThan': '2bb6379416fd19f44c3423a00bfd8626259f6067', 'versionType': 'git'}], 'programFiles': ['drivers/net/ppp/ppp_generic.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.30'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.30', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ppp/ppp_generic.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls /dev/ppp open is currently authorized against file->f_cred->user_ns, while unattached administrative ioctls operate on current->nsproxy->net_ns. As a result, a local unprivileged user can create a new user namespace with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace, and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against an inherited network namespace. Require CAP_NET_ADMIN in the user namespace that owns the target network namespace before handling unattached PPP administrative ioctls. This preserves normal pppd operation in the network namespace it is actually privileged in, while rejecting the userns-only inherited-netns case. Added Reference https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c Added Reference https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067 Added Reference https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e Added Reference https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8 Added Reference https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d Added Reference https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e Added Reference https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54 Added Reference https://git.kernel.org/stable/c/c9edd90c57ae23692fff6b049fdfa4572a9fd532