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.
Published: 2026-05-15
Score: 7.1 High
EPSS: 1.4% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-4587-1 linux security update
Debian DLA Debian DLA DLA-4588-1 linux-6.1 security update
Debian DSA Debian DSA DSA-6274-1 linux security update
Debian DSA Debian DSA DSA-6275-1 linux security update
Ubuntu USN Ubuntu USN USN-8370-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8371-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8373-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8374-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8426-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-8426-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-8440-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-8489-1 Linux kernel (OEM) vulnerabilities
History

Thu, 21 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 20 May 2026 20:30:00 +0000

Type Values Removed Values Added
References

Wed, 20 May 2026 16:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

 cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

Tue, 19 May 2026 16:30:00 +0000

Type Values Removed Values Added
References

Mon, 18 May 2026 13:30:00 +0000

Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Mon, 18 May 2026 06:30:00 +0000

Type Values Removed Values Added
References

Sat, 16 May 2026 13:30:00 +0000

Type Values Removed Values Added
References

Sat, 16 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Fri, 15 May 2026 20:30:00 +0000

Type Values Removed Values Added
References

Fri, 15 May 2026 13:45:00 +0000

Type Values Removed Values 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.
Title ptrace: slightly saner 'get_dumpable()' logic
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-01T12:05:06.860Z

Reserved: 2026-05-13T15:03:33.113Z

Link: CVE-2026-46333

cve-icon Vulnrichment

Updated: 2026-05-20T18:47:13.604Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-15T14:16:35.793

Modified: 2026-06-17T10:53:34.843

Link: CVE-2026-46333

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-15T05:55:00Z

Links: CVE-2026-46333 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-18T00:15:03Z

Weaknesses