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CVE-2021-47549

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/L…

Published May 24, 2024CWE-416EPSS 0.24%

Overview

CVE-2021-47549 is a high-severity vulnerability. It was published on May 24, 2024 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:

sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl

When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux,

a bug is reported:

==================================================================

BUG: Unable to handle kernel data access on read at 0x80000800805b502c

Oops: Kernel access of bad area, sig: 11 [#1]

NIP [c0000000000388a4] .ioread32+0x4/0x20

LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl]

Call Trace:

.free_irq+0x1c/0x4e0 (unreliable)

.ata_host_stop+0x74/0xd0 [libata]

.release_nodes+0x330/0x3f0

.device_release_driver_internal+0x178/0x2c0

.driver_detach+0x64/0xd0

.bus_remove_driver+0x70/0xf0

.driver_unregister+0x38/0x80

.platform_driver_unregister+0x14/0x30

.fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]

.__se_sys_delete_module+0x1ec/0x2d0

.system_call_exception+0xfc/0x1f0

system_call_common+0xf8/0x200

==========================================

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/0769449b0a5eabc3545337217ae690e46673e73aRefgit.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1Refgit.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097Refgit.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504Refgit.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45Refgit.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ceRefgit.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082Refgit.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947Refgit.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73aRefgit.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47549?

CVE-2021-47549 is a high-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47549?

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-2021-47549?

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-2021-47549?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47549 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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