Medium severity · published May 30, 2023
CVE-2023-2612
shiftfs lock unbalance in Ubuntu-specific kernels
4.7
CVSS
0.3%
EPSS
No
On KEV
Description
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UB
ubuntu-linux · Canonical Ltd.
before 02b47547824b1cd0d55c6744f91886f04de8947e · source: vendor
UL
Ubuntu Linux · Canonical
20.04; 22.04; 22.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2612
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-2612
packetstormsecurity.com
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
Mailing List
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/commit/?id=02b47547824b1cd0d55c6744f91886f04de8947e
Vendor Advisory
https://ubuntu.com/security/CVE-2023-2612
Vendor Advisory
https://ubuntu.com/security/notices/USN-6122-1
Vendor Advisory
https://ubuntu.com/security/notices/USN-6123-1
Vendor Advisory
https://ubuntu.com/security/notices/USN-6124-1