What is CVE-2021-46979?

CVE-2021-46979 is a medium-severity vulnerability in Linux, classified under Double Free. CVSS score: 5.5/10. Published 2024-02-28.

How severe is CVE-2021-46979?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Double Free in Linux

CVE-2021-46979

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice. For the first time during iio_device_unregister() then later on inside iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask(). Double free leads to kernel panic. Fix this by not touching ioctl handlers list directly but rather letting code responsible for registration call the matching cleanup routine itself.

Vulnerability class: Double Free

EPSS: 0.002 (12.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 8dedcc3eee3aceb37832176f0a1b03d5687acda3, 5.11, 0
Linux Linux_kernel — versions 5.13

Weakness classification (CWE)

CWE-415 — Double Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-46979?: CVE-2021-46979 is a medium-severity vulnerability in Linux, classified under Double Free. CVSS score: 5.5/10. Published 2024-02-28.
How severe is CVE-2021-46979?: Medium severity. CVSS v3 base score is 5.5 out of 10.