What is CVE-2021-47283?

CVE-2021-47283 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Missing Release of Resource after Effective Lifetime flaw (CWE-772), affecting Linux kernel versions from 5.9 onward and patched in 5.10.44, 5.12.11 and 5.13. CVE-2021-47283 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47283?

CVE-2021-47283 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-2021-47283?

Yes, CVE-2021-47283 has been patched. Fixed versions include 5.10.44, 5.12.11 and 5.13. If you are running Linux kernel 5.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47283 actively exploited?

CVE-2021-47283 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47283

Medium

In the Linux kernel, the following vulnerability has been resolved: net:sfc: fix non-freed irq in legacy irq mode SFC driver can be configured via modparam to work using MSI-X, MSI or legacy IRQ interrupts. In the last one, the interrupt was not properly released on module remove. It was not freed because the flag irqs_hooked was not set during initialization in the case of using legacy IRQ. Example of (trimmed) trace during module remove without this fix: remove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1' WARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170 ...trimmed... Call Trace: unregister_irq_proc+0xe3/0x100 free_desc+0x29/0x70 irq_free_descs+0x47/0x70 mp_unmap_irq+0x58/0x60 acpi_unregister_gsi_ioapic+0x2a/0x40 acpi_pci_irq_disable+0x78/0xb0 pci_disable_device+0xd1/0x100 efx_pci_remove+0xa1/0x1e0 [sfc] pci_device_remove+0x38/0xa0 __device_release_driver+0x177/0x230 driver_detach+0xcb/0x110 bus_remove_driver+0x58/0xd0 pci_unregister_driver+0x2a/0xb0 efx_exit_module+0x24/0xf40 [sfc] __do_sys_delete_module.constprop.0+0x171/0x280 ? exit_to_user_mode_prepare+0x83/0x1d0 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f9385800b ...trimmed...

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-26

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

Weakness type

CWE-772

CVE-2021-47283 is a Missing Release of Resource after Effective Lifetime vulnerability

What is Missing Release of Resource after Effective Lifetime?

The product does not release a resource after its effective lifetime has ended. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.9 and later are affected. Fixed in 5.10.44, 5.12.11, 5.13 and their respective stable series.

Affected from

≥ 5.9

Fixed in

✓ 5.10.44 5.10.x ✓ 5.12.11 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/81c4d1d83f88e15b26f4522a35cba6ffd8c5dfdd

Patch
Kernel Git
https://git.kernel.org/stable/c/8d717c9135a3340ae62d1699484850bfb4112b0c

Patch
Kernel Git
https://git.kernel.org/stable/c/8f03eeb6e0a0a0b8d617ee0a4bce729e47130036

Patch

Details

CVE ID CVE-2021-47283

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47283?

CVE-2021-47283 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Missing Release of Resource after Effective Lifetime flaw (CWE-772) . It affects Linux kernel versions from 5.9 onward and has been patched in 5.10.44, 5.12.11 and 5.13. CVE-2021-47283 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47283?

CVE-2021-47283 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-2021-47283?

Yes. CVE-2021-47283 has been patched. Fixed versions include 5.10.44, 5.12.11 and 5.13. If you are running Linux kernel 5.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47283 actively exploited?

No. CVE-2021-47283 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.