Linux Kernel up to 6.14.1 mm flush_tlb_range privilege escalation

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5.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 6.14.1. Affected is the function flush_tlb_range of the component mm. Such manipulation leads to an unknown weakness. This vulnerability is traded as CVE-2025-22045. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.14.1. Affected by this issue is the function flush_tlb_range of the component mm. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs On the following path, flush_tlb_range() can be used for zapping normal PMD entries (PMD entries that point to page tables) together with the PTE entries in the pointed-to page table: collapse_pte_mapped_thp pmdp_collapse_flush flush_tlb_range The arm64 version of flush_tlb_range() has a comment describing that it can be used for page table removal, and does not use any last-level invalidation optimizations. Fix the X86 version by making it behave the same way. Currently, X86 only uses this information for the following two purposes, which I think means the issue doesn't have much impact: - In native_flush_tlb_multi() for checking if lazy TLB CPUs need to be IPI'd to avoid issues with speculative page table walks. - In Hyper-V TLB paravirtualization, again for lazy TLB stuff. The patch "x86/mm: only invalidate final translations with INVLPGB" which is currently under review (see <https://lore.kernel.org/all/[email protected]/>) would probably be making the impact of this a lot worse.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2025-22045 since 12/29/2024. The exploitation is known to be easy. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 234884 (Debian dsa-5907 : affs-modules-6.1.0-33-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.292, 5.10.236, 5.15.180, 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2 or 6.15-rc1 eliminates this vulnerability. Applying the patch 618d5612ecb7bfc1c85342daafeb2b47e29e77a3/556d446068f90981e5d71ca686bdaccdd545d491/0a8f806ea6b5dd64b3d1f05ff774817d5f7ddbd1/0708fd6bd8161871bfbadced2ca4319b84ab44fe/7085895c59e4057ffae17f58990ccb630087d0d2/93224deb50a8d20df3884f3672ce9f982129aa50/320ac1af4c0bdb92c864dc9250d1329234820edf/78d6f9a9eb2a5da6fcbd76d6191d24b0dcc321be/3ef938c3503563bfc2ac15083557f880d29c2e64 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (234884) and CERT Bund (WID-SEC-2025-0844). Once again VulDB remains the best source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Dell Avamar
  • SolarWinds Security Event Manager
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 234884
Nessus Name: Debian dsa-5907 : affs-modules-6.1.0-33-4kc-malta-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.292/5.10.236/5.15.180/6.1.134/6.6.87/6.12.23/6.13.11/6.14.2/6.15-rc1
Patch: 618d5612ecb7bfc1c85342daafeb2b47e29e77a3/556d446068f90981e5d71ca686bdaccdd545d491/0a8f806ea6b5dd64b3d1f05ff774817d5f7ddbd1/0708fd6bd8161871bfbadced2ca4319b84ab44fe/7085895c59e4057ffae17f58990ccb630087d0d2/93224deb50a8d20df3884f3672ce9f982129aa50/320ac1af4c0bdb92c864dc9250d1329234820edf/78d6f9a9eb2a5da6fcbd76d6191d24b0dcc321be/3ef938c3503563bfc2ac15083557f880d29c2e64

Timelineinfo

12/29/2024 🔍
04/16/2025 +107 days 🔍
04/16/2025 +0 days 🔍
02/15/2026 +305 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-22045 (🔍)
GCVE (CVE): GCVE-0-2025-22045
GCVE (VulDB): GCVE-100-305084
CERT Bund: WID-SEC-2025-0844 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/16/2025 17:12
Updated: 02/15/2026 05:27
Changes: 04/16/2025 17:12 (57), 04/28/2025 06:08 (2), 07/15/2025 00:51 (7), 10/12/2025 23:56 (1), 10/31/2025 21:47 (12), 02/15/2026 05:27 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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