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Review reviewHigh

CVE-2024-50066

Linux Linux, linux_kernel, linux kernel

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix move_normal_pmd/retract_page_tables race In mremap(), move_page_tables() looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. At that point, the mmap_lock is held in write mode, but no rmap locks are held yet. For PMD entries that point to page tables and are fully covered by the source address range, move_pgt_entry(NORMAL_PMD, ...) is called, which first takes rmap locks, then does move_normal_pmd(). move_normal...

CVSS
7
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.10.23
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix move_normal_pmd/retract_page_tables race In mremap(), move_page_tables() looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. At that point, the mmap_lock is held in write mode, but no rmap locks are held yet. For PMD entries that point to page tables and are fully covered by the source address range, move_pgt_entry(NORMAL_PMD, ...) is called, which first takes rmap locks, then does move_normal_pmd(). move_normal...

Affected product and versions

Product
Linux Linux, linux_kernel, linux kernel
Affected versions
>= 1d65b771bc08cd054cf6d3766a72e113dc46d62f < 17396e32f975130b3e6251f024c8807d192e4c3e, >= 1d65b771bc08cd054cf6d3766a72e113dc46d62f < 1552ce9ce8af47c0fe911682e5e1855e25851ca9, >= 1d65b771bc08cd054cf6d3766a72e113dc46d62f < 6fa1066fc5d00cb9f1b0e83b7ff6ef98d26ba2aa, >= 6.6, >= 6.6 < 6.6.58, >= 1d65b771bc08 < 17396e32f975, >= 1d65b771bc08 < 1552ce9ce8af, >= 1d65b771bc08 < 6fa1066fc5d0, >= 6.7 < 6.11.5, 6.12
Fixed versions
6.6.58, 6.11.5

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux_kernel, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-362