CVE-2021-3739

EPSS 0.6%CWE-476

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

07 Mar 2022Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

n/a · kernel

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References

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