What is CVE-2021-47090?

CVE-2021-47090 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 5.10.89, 5.15.12 and 5.16. CVE-2021-47090 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47090?

CVE-2021-47090 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47090?

Yes, CVE-2021-47090 has been patched. Fixed versions include 5.10.89, 5.15.12 and 5.16. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47090 actively exploited?

CVE-2021-47090 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47090

Medium

In the Linux kernel, the following vulnerability has been resolved: mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page() Hulk Robot reported a panic in put_page_testzero() when testing madvise() with MADV_SOFT_OFFLINE. The BUG() is triggered when retrying get_any_page(). This is because we keep MF_COUNT_INCREASED flag in second try but the refcnt is not increased. page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:737! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 5 PID: 2135 Comm: sshd Tainted: G B 5.16.0-rc6-dirty #373 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: release_pages+0x53f/0x840 Call Trace: free_pages_and_swap_cache+0x64/0x80 tlb_flush_mmu+0x6f/0x220 unmap_page_range+0xe6c/0x12c0 unmap_single_vma+0x90/0x170 unmap_vmas+0xc4/0x180 exit_mmap+0xde/0x3a0 mmput+0xa3/0x250 do_exit+0x564/0x1470 do_group_exit+0x3b/0x100 __do_sys_exit_group+0x13/0x20 __x64_sys_exit_group+0x16/0x20 do_syscall_64+0x34/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae Modules linked in: ---[ end trace e99579b570fe0649 ]--- RIP: 0010:release_pages+0x53f/0x840

Package Linux Kernel

Published 2024-03-04

Last modified 2025-02-14

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 5.10.89, 5.15.12, 5.16 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.89 5.10.x ✓ 5.15.12 5.15.x ✓ 5.16

References

3 total

Kernel Git
https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5

Exploit Mailing List Patch
Kernel Git
https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418

Exploit Mailing List Patch
Kernel Git
https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3

Exploit Mailing List Patch

Details

CVE ID CVE-2021-47090

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-04

Modified 2025-02-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47090?

CVE-2021-47090 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.89, 5.15.12 and 5.16. CVE-2021-47090 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47090?

CVE-2021-47090 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47090?

Yes. CVE-2021-47090 has been patched. Fixed versions include 5.10.89, 5.15.12 and 5.16. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47090 actively exploited?

No. CVE-2021-47090 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.