Bug 2477802 (CVE-2026-46333)

Summary:	CVE-2026-46333 kernel: Read root-owned files as an unprivileged user
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	cchiang, eric.eisenhart, markus.janse, rhel-process-autobot, shalygin.k, victor.cardoso, villapla, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A vulnerability was found in the Linux kernel that allows an unprivileged local user to read sensitive files normally restricted to the root user. The flaw occurs during process exit, where a brief window allows an attacker to intercept file access from a privileged process before it fully terminates. Successful exploitation may lead to the disclosure of sensitive data such as SSH host private keys or /etc/shadow contents.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-15 08:30:40 UTC

Read root-owned files as an unprivileged user. Pre-31e62c2ebbfd kernels (everything in stable as of 2026-05-14).

The bug
__ptrace_may_access() skips the dumpable check when task->mm == NULL. do_exit() runs exit_mm() before exit_files() — no mm, fds still there. pidfd_getfd(2) succeeds in that window when the caller's uid matches the target's.

Reported by Qualys, fixed by Linus 2026-05-14. Jann Horn flagged the FD-theft shape in October 2020. Six years.

Comment 3 errata-xmlrpc 2026-05-20 04:05:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:19521 https://access.redhat.com/errata/RHSA-2026:19521

Comment 4 errata-xmlrpc 2026-05-20 06:48:57 UTC

This issue has been addressed in the following products:

  NVIDIA for RHEL 10

Via RHSA-2026:19540 https://access.redhat.com/errata/RHSA-2026:19540

Comment 5 errata-xmlrpc 2026-05-20 12:15:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19569 https://access.redhat.com/errata/RHSA-2026:19569

Comment 6 errata-xmlrpc 2026-05-20 12:57:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19568 https://access.redhat.com/errata/RHSA-2026:19568

Comment 7 errata-xmlrpc 2026-05-20 13:01:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:19664 https://access.redhat.com/errata/RHSA-2026:19664

Comment 8 errata-xmlrpc 2026-05-20 13:18:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:19666 https://access.redhat.com/errata/RHSA-2026:19666

Comment 9 errata-xmlrpc 2026-05-20 14:21:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:19705 https://access.redhat.com/errata/RHSA-2026:19705

Comment 10 errata-xmlrpc 2026-05-20 15:44:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:19711 https://access.redhat.com/errata/RHSA-2026:19711

Comment 11 errata-xmlrpc 2026-05-20 23:34:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:19875 https://access.redhat.com/errata/RHSA-2026:19875

Comment 12 errata-xmlrpc 2026-05-21 07:28:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:20051 https://access.redhat.com/errata/RHSA-2026:20051

Comment 13 errata-xmlrpc 2026-05-21 12:37:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:20130 https://access.redhat.com/errata/RHSA-2026:20130

Comment 14 errata-xmlrpc 2026-05-21 13:26:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:20054 https://access.redhat.com/errata/RHSA-2026:20054

Comment 15 errata-xmlrpc 2026-05-21 14:04:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:20129 https://access.redhat.com/errata/RHSA-2026:20129

Comment 16 errata-xmlrpc 2026-05-21 17:47:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:20299 https://access.redhat.com/errata/RHSA-2026:20299

Comment 17 errata-xmlrpc 2026-05-26 05:47:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:20593 https://access.redhat.com/errata/RHSA-2026:20593