CVE-2021-3739

Description

A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.

CVSS breakdown

Affected products

• fedoraproject / fedora34 – 34
• Linux / Linux kernel4.20 – 5.4.144
• NetApp / h300e_firmware
• NetApp / h300s_firmware
• NetApp / h410c_firmware
• NetApp / h410s_firmware
• NetApp / h500e_firmware
• NetApp / h500s_firmware
• NetApp / h700e_firmware
• NetApp / h700s_firmware

References

• MISChttps://bugzilla.redhat.com/show_bug.cgi?id=1997958
• VENDOR_ADVISORYhttps://ubuntu.com/security/CVE-2021-3739
• MAILING_LISThttps://www.openwall.com/lists/oss-security/2021/08/25/3
• MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091
• PATCHhttps://github.com/torvalds/linux/commit/e4571b8c5e9ffa1e85c0c671995bd4dcc5c75091
• MISChttps://security.netapp.com/advisory/ntap-20220407-0006/