CVE-2023-52757Use After Free in Linux

Severity
7.8HIGHNVD
OSV8.8OSV7.1
EPSS
0.0%
top 98.58%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedMay 21
Latest updateOct 21

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential deadlock when releasing mids All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways. By getting rid of such spinlock also fixes a potential deadlock as shown below CPU 0 CPU 1 cifs_demultiplex_thread() cifs_debug_data_proc_sh

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages6 packages

NVDlinux/linux_kernel5.115.15.181+4
Debianlinux/linux_kernel< 5.10.237-1+3
Ubuntulinux/linux_kernel< 5.15.0-144.157+2
CVEListV5linux/linux7b71843fa7028475b052107664cbe120156a2cfc99f476e27aad5964ab13777d84fda67d1356dec1+7
debiandebian/linux< linux 6.1.64-1 (bookworm)

Also affects: Debian Linux 11.0

Patches

🔴Vulnerability Details

22
OSV
linux-azure-fips vulnerabilities2025-10-21
OSV
linux-oracle-5.4 vulnerabilities2025-10-21
OSV
linux-azure, linux-azure-5.4 vulnerabilities2025-10-13
OSV
linux-iot vulnerabilities2025-08-21
OSV
linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities2025-08-20

📋Vendor Advisories

23
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities2025-10-21
Ubuntu
Linux kernel (Oracle) vulnerabilities2025-10-21
Ubuntu
Linux kernel (Azure) vulnerabilities2025-10-13
Ubuntu
Linux kernel (IoT) vulnerabilities2025-08-21
Ubuntu
Linux kernel (FIPS) vulnerabilities2025-08-20

💬Community

1
Bugzilla
CVE-2023-52757 kernel: smb: client: fix potential deadlock when releasing mids2024-05-22