CVE-2026-46333

High

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.

Package Linux Kernel
Published 2026-05-15
Last modified 2026-05-22
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.1

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness type

CWE-269

CVE-2026-46333 is classified as CWE-269

See CWE-269 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 3.16.52, 4.4.40, 4.8.16, 4.9.1, 4.10 and later are affected. Fixed in 5.10.256, 5.15.207, 6.1.173, 6.6.139, 6.12.89, 6.18.31, 7.0.8, 7.1-rc4 and their respective stable series.

Affected from
≥ 3.16.52 ≥ 4.4.40 ≥ 4.8.16 ≥ 4.9.1 ≥ 4.10
Fixed in
✓ 5.10.256 5.10.x ✓ 5.15.207 5.15.x ✓ 6.1.173 6.1.x ✓ 6.6.139 6.6.x ✓ 6.12.89 6.12.x ✓ 6.18.31 6.18.x ✓ 7.0.8 7.0.x ✓ 7.1-rc4

References

The following references provide additional information about CVE-2026-46333 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

8 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2026-46333?

    CVE-2026-46333 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 3.16.52 onward and has been patched in 5.10.256, 5.15.207, 6.1.173 and others. CVE-2026-46333 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-46333?

    CVE-2026-46333 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N .

  • Is there a patch available for CVE-2026-46333?

    Yes — CVE-2026-46333 has been patched. Fixed versions include 5.10.256, 5.15.207, 6.1.173 and others. If you are running Linux kernel 3.16.52 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-46333 actively exploited?

    No — CVE-2026-46333 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST