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Review reviewHigh

CVE-2026-53359

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad ("KVM: x86: Fix shadow paging use-after-free due to unexpected GFN") fixed a shadow paging mismatch between stored and computed GFNs; the bug could be triggered by changing a PDE mapping from outside the guest, and then deleting a memslot. The rmap_remove() call would miss entries created after the PDE change because the GFN of the leaf SPTE does not match the GFN of the struct kvm_mmu_page. A similar hole however remains if the modified...

CVSS
8.8
EPSS
0.91%
56.3% percentile
CISA KEV
Not listed
Published
2026.07.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.91%
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad ("KVM: x86: Fix shadow paging use-after-free due to unexpected GFN") fixed a shadow paging mismatch between stored and computed GFNs; the bug could be triggered by changing a PDE mapping from outside the guest, and then deleting a memslot. The rmap_remove() call would miss entries created after the PDE change because the GFN of the leaf SPTE does not match the GFN of the struct kvm_mmu_page. A similar hole however remains if the modified...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < b1337aae5e194324e4810d561764e7793f8b3864, >= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < 9291654d69e08542de37755cebe4d5b02c3170d1, >= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < 2ad3afa40ac6aa340dada122f9abfa46c0a6eb35, >= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < 5e470998a23e4c3d89ed24e8172cb22747e61efa, >= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < 1ae7d5a6db6c190ce183e3098ca0e0846e14d462, >= 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 < 81ccda30b4e83d8f5cc4fd50503c44e3a33abfeb, >= 2.6.36, >= 2.6.36 < 6.1.177, >= 6.2 < 6.6.144, >= 6.7 < 6.12.95, >= 6.13 < 6.18.38, >= 6.19 < 7.1.3
Fixed versions
6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.1.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, 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:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-416
CVE-2026-53359 — Linux Linux, linux kernel | SECUFOCUS NOW