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CVE-2022-48802

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fs/proc: task_mmu.c: don't read mapcount for migration entry The syzbot reported the below BUG: kernel BUG at include/linux/…

Published Jul 16, 2024EPSS 0.29%

Overview

CVE-2022-48802 is a medium-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

fs/proc: task_mmu.c: don't read mapcount for migration entry

The syzbot reported the below BUG:

kernel BUG at include/linux/page-flags.h:785!

invalid opcode: 0000 [#1] PREEMPT SMP KASAN

CPU: 1 PID: 4392 Comm: syz-executor560 Not tainted 5.16.0-rc6-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

RIP: 0010:PageDoubleMap include/linux/page-flags.h:785 [inline]

RIP: 0010:__page_mapcount+0x2d2/0x350 mm/util.c:744

Call Trace:

page_mapcount include/linux/mm.h:837 [inline]

smaps_account+0x470/0xb10 fs/proc/task_mmu.c:466

smaps_pte_entry fs/proc/task_mmu.c:538 [inline]

smaps_pte_range+0x611/0x1250 fs/proc/task_mmu.c:601

walk_pmd_range mm/pagewalk.c:128 [inline]

walk_pud_range mm/pagewalk.c:205 [inline]

walk_p4d_range mm/pagewalk.c:240 [inline]

walk_pgd_range mm/pagewalk.c:277 [inline]

__walk_page_range+0xe23/0x1ea0 mm/pag

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/05d3f8045efa59457b323caf00bdb9273b7962faRefgit.kernel.org/stable/c/24d7275ce2791829953ed4e72f68277ceb2571c6Refgit.kernel.org/stable/c/a8dd0cfa37792863b6c4bf9542975212a6715d49Refgit.kernel.org/stable/c/db3f3636e4aed2cba3e4e7897a053323f7a62249Refgit.kernel.org/stable/c/05d3f8045efa59457b323caf00bdb9273b7962faRefgit.kernel.org/stable/c/24d7275ce2791829953ed4e72f68277ceb2571c6Refgit.kernel.org/stable/c/a8dd0cfa37792863b6c4bf9542975212a6715d49Refgit.kernel.org/stable/c/db3f3636e4aed2cba3e4e7897a053323f7a62249

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48802?

CVE-2022-48802 is a medium-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48802?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-48802?

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-2022-48802?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48802 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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