Ubuntu.comUB:CVE-2021-47579CVE-2021-47579
AI Score
Confidence
High
In the Linux kernel, the following vulnerability has been resolved: ovl:
fix warning in ovl_create_real() Syzbot triggered the following warning in
ovl_workdir_create() -> ovl_create_real(): if (!err &&
WARN_ON(!newdentry->d_inode)) { The reason is that the cgroup2 filesystem
returns from mkdir without instantiating the new dentry. Weird filesystems
such as this will be rejected by overlayfs at a later stage during setup,
but to prevent such a warning, call ovl_mkdir_real() directly from
ovl_workdir_create() and reject this case early.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-bluefield | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-gcp-5.4 | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gkeop | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-hwe-5.4 | < any | UNKNOWN |
References
git.kernel.org/linus/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c (5.16-rc1)
git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c
git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8
git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7
git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02
git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0
launchpad.net/bugs/cve/CVE-2021-47579
nvd.nist.gov/vuln/detail/CVE-2021-47579
security-tracker.debian.org/tracker/CVE-2021-47579
www.cve.org/CVERecord?id=CVE-2021-47579
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