7.1
HIGH CVSS 3.1
CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic
Description

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

INFO

Published Date :

May 15, 2026, 2:16 p.m.

Last Modified :

May 22, 2026, 4:33 p.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2026-46333 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
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Update the Linux kernel to address ptrace dumpability logic and capability requirements.
  • Update the Linux kernel.
  • Ensure CAP_SYS_PTRACE capability for overrides.
  • Review task dumpability logic.
  • Check ptrace access controls.
Public PoC/Exploit Available at Github

CVE-2026-46333 has a 22 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-46333 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-2026-46333 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).

Vagrant VMs with known CVEs for exploit testing

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : May 22, 2026, 3:26 a.m. This repo has been linked 3 different CVEs too.

Multi-architecture Linux privilege escalation toolkit with 18 pre-built and runtime-compilable exploits. Auto-detects kernel version, filters patched exploits, tries each until root.

ctf cybersecurity exploit gtfobins kernel-exploit linux penetration-testing privilege-escalation security

Makefile Shell C Go

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : May 21, 2026, 7:33 p.m. This repo has been linked 14 different CVEs too.

None

TypeScript Batchfile JavaScript Dockerfile HTML CSS Shell PowerShell Go PLpgSQL

Updated: 1 week, 4 days ago
33 stars 6 fork 6 watcher
Born at : May 21, 2026, 1:12 p.m. This repo has been linked 7 different CVEs too.

CVE-2026-31431-killed page-cache exploit — code exec into containers sharing the same image layer

Makefile C

Updated: 1 week, 5 days ago
12 stars 3 fork 3 watcher
Born at : May 20, 2026, 4:37 a.m. This repo has been linked 2 different CVEs too.

An eBPF LSM program to filter user actions on HPC systems

ebpf

Rust C Shell Dockerfile

Updated: 1 week, 6 days ago
4 stars 0 fork 0 watcher
Born at : May 19, 2026, 1:42 p.m. This repo has been linked 2 different CVEs too.

SSH Penetration Testing Lab — Educational Purpose

Updated: 2 weeks ago
0 stars 0 fork 0 watcher
Born at : May 18, 2026, 10:55 p.m. This repo has been linked 2 different CVEs too.

Small C utility for temporary hardening against recent pidfd_getfd-based local file-descriptor theft chains. Fix applies to Arch, Debian/Ubuntu platforms

C

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : May 18, 2026, 1:47 p.m. This repo has been linked 1 different CVEs too.

None

Python C# TSQL XSLT Yacc CSS JavaScript Shell Makefile Assembly

Updated: 2 weeks ago
0 stars 0 fork 0 watcher
Born at : May 18, 2026, 12:03 p.m. This repo has been linked 12 different CVEs too.

None

Python Makefile Shell

Updated: 1 day, 8 hours ago
0 stars 0 fork 0 watcher
Born at : May 17, 2026, 10:35 a.m. This repo has been linked 5 different CVEs too.

Research on `pidfd_getfd(2)`-based file descriptor leakage from privileged SUID processes. Demonstrates race-condition FD capture against OpenSSH `ssh-keysign` and exposure of sensitive root-owned file handles.

exploit golang kernel linux cve-2026-46333

Go

Updated: 2 weeks, 4 days ago
1 stars 0 fork 0 watcher
Born at : May 17, 2026, 10:33 a.m. This repo has been linked 1 different CVEs too.

CVE-2026-46333

C

Updated: 2 weeks, 3 days ago
5 stars 2 fork 2 watcher
Born at : May 17, 2026, 10:14 a.m. This repo has been linked 1 different CVEs too.

Use CVE-2026-46333 and CVE-2026-31431 to change any user's password.

Python

Updated: 2 weeks, 4 days ago
0 stars 0 fork 0 watcher
Born at : May 17, 2026, 6:44 a.m. This repo has been linked 2 different CVEs too.

Checks your Linux kernel against known privilege escalation bugs and tells you what to do.

Shell Python

Updated: 2 weeks, 5 days ago
0 stars 0 fork 0 watcher
Born at : May 16, 2026, 3:57 p.m. This repo has been linked 5 different CVEs too.

CHARON — pre-built PoC for CVE-2026-46333 (Linux ptrace mm==NULL fd theft)

Makefile C

Updated: 2 weeks, 3 days ago
4 stars 0 fork 0 watcher
Born at : May 16, 2026, 3:34 a.m. This repo has been linked 1 different CVEs too.

Linux hardening + real-time monitoring suite by Ash 🜂 & Pasan Senanayake

Shell

Updated: 1 week, 4 days ago
1 stars 0 fork 0 watcher
Born at : May 15, 2026, 9:19 p.m. This repo has been linked 3 different CVEs too.

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

The following list is the news that have been mention CVE-2026-46333 vulnerability anywhere in the article.

  • security.nl
Nieuw Linux-lek laat lokale aanvaller SSH-keys stelen en code als root uitvoeren

Een nieuwe Linux-kwetsbaarheid maakt het mogelijk voor lokale aanvallers om onder andere SSH-keys te stelen en code als root uit te voeren. Updates en mitigaties zijn beschikbaar en beheerders worden ... Read more

Published Date: May 22, 2026 (1 week, 6 days ago)
  • CybersecurityNews
P2PInfect Botnet Compromises Kubernetes Clusters Through Exposed Redis Instances

A well-known botnet is now targeting cloud environments in a more calculated way than before. P2PInfect, a Rust-written peer-to-peer malware active since mid-2023, has been observed compromising Kuber ... Read more

Published Date: May 21, 2026 (2 weeks ago)
  • CybersecurityNews
Nine-year-old Linux Kernel Vulnerability Let Attackers Exfiltrate SSH Private Keys

A newly disclosed Linux kernel vulnerability, tracked as CVE-2026-46333, exposes a serious local privilege escalation flaw that has remained undetected for nearly nine years. Security researchers at t ... Read more

Published Date: May 21, 2026 (2 weeks ago)
  • The Hacker News
9-Year-Old Linux Kernel Flaw Enables Root Command Execution on Major Distros

Cybersecurity researchers have disclosed details of a vulnerability in the Linux kernel that remained undetected for nine years. The vulnerability, tracked as CVE-2026-46333 (CVSS score: 5.5), is a ca ... Read more

Published Date: May 21, 2026 (2 weeks ago)
  • CybersecurityNews
Linux Kernel Vulnerability “ssh-keysign-pwn” Lets Attackers Read SSH Keys and Shadow Passwords

A newly disclosed Linux kernel vulnerability is raising serious concerns across the security community, as it allows attackers to access highly sensitive data, including SSH private keys and password ... Read more

Published Date: May 16, 2026 (2 weeks, 5 days ago)

The following table lists the changes that have been made to the CVE-2026-46333 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 134c704f-9b21-4f2e-91b3-4a467353bcc0

    May. 21, 2026

    Action Type Old Value New Value
    Removed CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    May. 20, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/05/20/14
    Added Reference http://www.openwall.com/lists/oss-security/2026/05/20/16
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 20, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    May. 19, 2026

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    May. 18, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    Added CWE CWE-269
    Added Reference https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 18, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    May. 16, 2026

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    May. 15, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/05/15/9
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 15, 2026

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.
    Added Reference https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730
    Added Reference https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205
    Added Reference https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
    Added Reference https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181
    Added Reference https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d
    Added Reference https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7
    Added Reference https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6
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.