Medium severity · published Nov 21, 2023
CVE-2023-6238
Kernel: nvme: memory corruption via unprivileged user passthrough
6.7
CVSS
0.3%
EPSS
No
On KEV
Description
A buffer overflow vulnerability was found in the NVM Express (NVMe) driver in the Linux kernel. Only privileged user could specify a small meta buffer and let the device perform larger Direct Memory Access (DMA) into the same buffer, overwriting unrelated kernel memory, causing random kernel crashes and memory corruption.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
All versions, or not specified · source: vendor, NVD
FE
Fedora · Fedoraproject
38 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6238
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6238
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-6238
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2250834
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