5.5

CVE-2021-47579

ovl: fix warning in ovl_create_real()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.19.222
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.168
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.88
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.11
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.142
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c
Patch
https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8
Patch
https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7
Patch
https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02
Patch
https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0
Patch