Bug 2492788 (CVE-2026-53189) - CVE-2026-53189 kernel: mm/huge_memory: update file PMD counter before folio_put()
Summary: CVE-2026-53189 kernel: mm/huge_memory: update file PMD counter before folio_p...
Keywords:
Status: NEW
Alias: CVE-2026-53189
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 10:05 UTC by OSIDB Bzimport
Modified: 2026-09-01 07:30 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:57252 0 None None None 2026-08-20 05:13:17 UTC
Red Hat Product Errata RHSA-2026:57253 0 None None None 2026-08-20 04:24:30 UTC
Red Hat Product Errata RHSA-2026:57254 0 None None None 2026-08-20 03:42:25 UTC
Red Hat Product Errata RHSA-2026:61887 0 None None None 2026-09-01 07:30:26 UTC

Description OSIDB Bzimport 2026-06-25 10:05:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mm/huge_memory: update file PMD counter before folio_put()

__split_huge_pmd_locked() updates the file/shmem RSS counter after
dropping the PMD mapping's folio reference.  If folio_put() drops the last
reference, mm_counter_file() can later read freed folio state via
folio_test_swapbacked().

Move the counter update before folio_put().
Comment 1 TEJ RATHI 2026-06-26 07:57:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062557-CVE-2026-53189-1b4a@gregkh/T
Comment 5 errata-xmlrpc 2026-08-20 03:42:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:57254 https://access.redhat.com/errata/RHSA-2026:57254
Comment 6 errata-xmlrpc 2026-08-20 04:24:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:57253 https://access.redhat.com/errata/RHSA-2026:57253
Comment 7 errata-xmlrpc 2026-08-20 05:13:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:57252 https://access.redhat.com/errata/RHSA-2026:57252
Comment 8 errata-xmlrpc 2026-09-01 07:30:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61887 https://access.redhat.com/errata/RHSA-2026:61887
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