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CVE-2026-98507

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mm/rmap: fix missing barrier between anon_vma init and vma->anon_vma publish On arm64 server, we find that a task trying to gra…

Published Oct 18, 2026EPSS 0.17%

Overview

CVE-2026-98507 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

mm/rmap: fix missing barrier between anon_vma init and vma->anon_vma publish

On arm64 server, we find that a task trying to grab the anon_vma lock

triggers hungtask.

INFO: task main:2354726 blocked for more than 120 seconds.

Tainted: G E 5.10.0-0021.aarch64 #1

"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

task:main state:D stack: 0 pid:2354726 ppid:2350673 flags:0x00000a01

Call trace:

__switch_to+0x7c/0xbc

__schedule+0x3b4/0x8a0

schedule+0x50/0xe0

rwsem_down_write_slowpath+0x3cc/0x6cc

down_write+0x60/0x260

__anon_vma_prepare+0x6c/0x210

do_anonymous_page+0x258/0x660

handle_pte_fault+0x188/0x214

__handle_mm_fault+0x1b0/0x380

handle_mm_fault+0xf4/0x284

do_page_fault+0x19c/0x494

do_translation_fault+0xcc/0xf8

do_mem_abort+0x48/0xac

el0_da+0x44/0x80

el0_sync_handler+0x88/0xb4

el0_sync+0x160/0x180

After analyzing the vmcore, we found the anon_

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/465e222815c8839445d09028fa4c77e70f7f1c7dRefgit.kernel.org/stable/c/4cef512a955e4008ae4436a4fc97726976df1fdfRefgit.kernel.org/stable/c/7d103fc7b836084af585d9d3471334624354cf26Refgit.kernel.org/stable/c/a500df43cde075f6ea4b8bae495d89f2c35b3e16Refgit.kernel.org/stable/c/aef0f69b515af1c8a4147f68a46b6b81854f46f7Refgit.kernel.org/stable/c/b6ac0b3f6013c168f22cad97e79967accacb08e1Refgit.kernel.org/stable/c/badedec499f6320742368c73fa77cd63dcf8ca55Refgit.kernel.org/stable/c/d348a715380bfcc6a611bdf722169d53fd01e735

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98507?

CVE-2026-98507 is a high-severity vulnerability. It was published on October 18, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-98507?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98507?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98507?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98507 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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