Critical severity · published Dec 8, 2025
CVE-2023-53751
cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
TCP_Server_Info::hostname may be updated once or many times during
reconnect, so protect its access outside reconnect path as well and
then prevent any potential use-after-free bugs.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
93d5cb517db39e8af8d1292f9e785e4983b7f708 before 64d62ac6d6514cba1305bd08e271ec1843bdd612; 93d5cb517db39e8af8d1292f9e785e4983b7f708 before c511954bf142fe1995aec3c739a9f1a76990283a; 93d5cb517db39e8af8d1292f9e785e4983b7f708 before 0b08c4c499200be67d54c439d56e5ea866869945; 93d5cb517db39e8af8d1292f9e785e4983b7f708 before 90c49fce1c43e1cc152695e20363ff5087897c09; 5.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-53751
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-53751
git.kernel.org
https://git.kernel.org/stable/c/0b08c4c499200be67d54c439d56e5ea866869945
git.kernel.org
https://git.kernel.org/stable/c/64d62ac6d6514cba1305bd08e271ec1843bdd612
git.kernel.org
https://git.kernel.org/stable/c/90c49fce1c43e1cc152695e20363ff5087897c09
git.kernel.org
https://git.kernel.org/stable/c/c511954bf142fe1995aec3c739a9f1a76990283a
More from Linux
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
7.8
CVE-2026-53362
ipv6: account for fraggap on the paged allocation path
7.8
CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing
7.8
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place