What’s Vulnerable › Vulnerabilities

CVE-2021-37159

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-21 · updated 2026-10-08
• Weakness: CWE-415

Description

hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.

Affected products

• Debian Linux: 9.0
• Linux kernel: through 5.13.4
• Oracle Communications Cloud Native Core Binding Support Function: 22.1.3
• Oracle Communications Cloud Native Core Network Exposure Function: 22.1.1
• Oracle Communications Cloud Native Core Policy: 22.2.0

References

• https://bugzilla.suse.com/show_bug.cgi?id=1188601
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145
• https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
• https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
• https://security.netapp.com/advisory/ntap-20210819-0003/
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://www.spinics.net/lists/linux-usb/msg202228.html
• https://bugzilla.suse.com/show_bug.cgi?id=1188601
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145
• https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html

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