Linux Kernel up to 6.18.35/7.0.12 mm mincore_swap privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.35/7.0.12. It has been declared as critical. This issue affects the function mincore_swap of the component mm. Such manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2026-53333. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.35/7.0.12. Affected by this issue is the function mincore_swap of the component mm. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/mincore: handle non-swap entries before !CONFIG_SWAP guard mincore_swap() also fields migration/hwpoison entries (and shmem swapin-error entries), which can exist on !CONFIG_SWAP builds when CONFIG_MIGRATION or CONFIG_MEMORY_FAILURE is enabled. The !IS_ENABLED(CONFIG_SWAP) guard ran before the non-swap-entry early return, so mincore_pte_range() can spuriously WARN and report these pages nonresident on !CONFIG_SWAP kernels. Move the guard below the non-swap-entry check so only true swap entries trip the WARN, and migration/hwpoison entries take the existing "uptodate / non-shmem" path.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-53333 since 06/09/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 327383 (Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1925)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.36 or 7.0.13 eliminates this vulnerability. Applying the patch a8f91ddf67f669f547bb9fb559738da6f8ee2cf3/3481d4372ae34243f7025925314385b852c50f7e/0c25b8734367574e21aeb8468c2e522713134da7 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 (327383) and CERT Bund (WID-SEC-2026-2175). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Linux Kernel

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: 5.3

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

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 327383
Nessus Name: Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1925)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.36/7.0.13
Patch: a8f91ddf67f669f547bb9fb559738da6f8ee2cf3/3481d4372ae34243f7025925314385b852c50f7e/0c25b8734367574e21aeb8468c2e522713134da7

Timelineinfo

06/09/2026 CVE reserved
07/01/2026 +22 days Advisory disclosed
07/01/2026 +0 days VulDB entry created
07/18/2026 +17 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-53333 (🔒)
GCVE (CVE): GCVE-0-2026-53333
GCVE (VulDB): GCVE-100-375500
CERT Bund: WID-SEC-2026-2175 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 07/01/2026 16:02
Updated: 07/18/2026 14:28
Changes: 07/01/2026 16:02 (58), 07/02/2026 18:33 (7), 07/18/2026 14:28 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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