High severity · published May 1, 2023
CVE-2023-2236
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.
Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability.
We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.19 before 6.0.11 · source: NVD
HB
Hci Baseboard Management Controller · Netapp
h300s; h410c; h410s; h500s; h700s · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2236
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-2236
Exploit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4
Exploit
https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4
Vendor Advisory
https://security.netapp.com/advisory/ntap-20230601-0010/
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