CVE-2025-21955Linux vulnerability

42 documents7 sources
Severity
5.5MEDIUMNVD
OSV5.9OSV4.7
EPSS
0.1%
top 80.00%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedApr 1
Latest updateOct 15

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent connection release during oplock break notification ksmbd_work could be freed when after connection release. Increment r_count of ksmbd_conn to indicate that requests are not finished yet and to not release the connection.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages6 packages

NVDlinux/linux_kernel5.156.6.84+3
Debianlinux/linux_kernel< 6.12.20-1+1
Ubuntulinux/linux_kernel< 6.8.0-84.84
CVEListV5linux/linux0626e6641f6b467447c81dd7678a69c66f7746cf09aeab68033161cb54f194da93e51a11aee6144b+4
debiandebian/linux< linux 6.12.20-1 (forky)

Patches

🔴Vulnerability Details

20
OSV
linux-oracle-6.8 vulnerabilities2025-10-15
OSV
linux-azure-nvidia vulnerabilities2025-10-08
OSV
linux-oracle vulnerabilities2025-10-06
OSV
linux-azure, linux-azure-6.8 vulnerabilities2025-10-02
OSV
linux-raspi-realtime vulnerabilities2025-10-02

📋Vendor Advisories

21
Ubuntu
Linux kernel (Oracle) vulnerabilities2025-10-15
Ubuntu
Linux kernel (Azure, N-Series) vulnerabilities2025-10-08
Ubuntu
Linux kernel (Oracle) vulnerabilities2025-10-06
Ubuntu
Linux kernel (Raspberry Pi Real-time) vulnerabilities2025-10-02
Ubuntu
Linux kernel (HWE) vulnerabilities2025-10-02