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CVE-2021-44733

HIGHCVSS 7/10EPSS 0.69%

Last modified

CVE-2021-44733 is a high-severity vulnerability rated 7/10 on the CVSS scale. A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.

Metrics

CVSS 3.1
7/10

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

EPSS Probability
0.69%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 4.12, < 4.14.261
LinuxLinux Kernel>= 4.15, < 4.19.224
LinuxLinux Kernel>= 4.20, < 5.4.170
LinuxLinux Kernel>= 5.5, < 5.10.89
LinuxLinux Kernel>= 5.11, < 5.15.12
RedhatEnterprise Linux8.0
FedoraprojectFedora35
DebianDebian Linux9.0
DebianDebian Linux10.0
DebianDebian Linux11.0
NetappH410c FirmwareAll versions
NetappH300s FirmwareAll versions
NetappH500s FirmwareAll versions
NetappH700s FirmwareAll versions
NetappH300e FirmwareAll versions
NetappH500e FirmwareAll versions
NetappH700e FirmwareAll versions
NetappH410s FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2021-44733?
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
How severe is CVE-2021-44733?
CVE-2021-44733 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.
How do I fix CVE-2021-44733?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST