CVE-2026-46333
7.1 HIGHIn the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of ...
Published: 2026-05-15 · Last updated: 2026-05-21
Severity and scoring
- CVSS
- 7.1 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CWE
- CWE-269
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-46333
- [Other]https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730
- [Other]https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205
- [Other]https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
- [Other]https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a
- [Other]https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181
- [Other]https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d
- [Other]https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7
- [Other]https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6
- [Other]http://www.openwall.com/lists/oss-security/2026/05/15/9
- [Other]http://www.openwall.com/lists/oss-security/2026/05/20/14
- [Other]http://www.openwall.com/lists/oss-security/2026/05/20/16
- [Other]https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html
- [Other]https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html
- [Other]https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/
Related CVEs
Same CWE
- CVE-2024-38487 — api-gateway container running with root privilege would allow an attacker to escape the container and access host system to perform unint... (7.0 HIGH)
- CVE-2026-12313 — Information disclosure, sandbox escape in the Security: Process Sandboxing component (4.7 MEDIUM)
- CVE-2026-12289 — Privilege escalation in the Graphics: WebRender component (8.8 HIGH)
- CVE-2026-8176 — The LatePoint – Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Privilege Escalation to Adminis... (7.5 HIGH)
- CVE-2025-9912 — Nokia SR Linux is vulnerable to a local privilege escalation vulnerability (6.3 MEDIUM)