Medium severity · published Nov 1, 2023
CVE-2023-1192
Use-after-free in smb2_is_status_io_timeout()
6.5
CVSS
1.1%
EPSS
No
On KEV
Description
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 6.4 · source: vendor, NVD
FE
Fedora · Fedora
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-1192
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-1192
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-1192
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2154178
git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d527f51331cace562393a8038d870b3e9916686f
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