Skip to main content

Linux Kernel CVE-2025-37926

HIGH
Use After Free (CWE-416)
2025-05-20 416baaa9-dc9f-4396-8d5f-8c081fb06d67
7.8
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 17, 2026 - 20:45 vuln.today
Patch released
Mar 17, 2026 - 20:45 nvd
Patch available
CVE Published
May 20, 2025 - 16:15 nvd
HIGH 7.8

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix use-after-free in ksmbd_session_rpc_open

A UAF issue can occur due to a race condition between ksmbd_session_rpc_open() and __session_rpc_close(). Add rpc_lock to the session to protect it.

AnalysisAI

A use-after-free vulnerability exists in the Linux kernel's ksmbd (in-kernel SMB server) component, where a race condition between ksmbd_session_rpc_open() and __session_rpc_close() functions can lead to memory corruption. This vulnerability affects Linux kernel versions up to 6.15-rc4 and allows local attackers with low privileges to potentially execute arbitrary code or cause system crashes, achieving complete compromise of confidentiality, integrity, and availability. With an EPSS score of 0.07%, the vulnerability has low real-world exploitation likelihood despite its high CVSS score, and patches are available from the vendor.

Technical ContextAI

The vulnerability resides in ksmbd, which is the in-kernel SMB/CIFS server implementation in Linux that allows the kernel to serve SMB protocol directly without userspace components. Based on the CPE data, the vulnerability affects Linux kernel versions ranging from earlier releases through 6.15 release candidates (rc1 through rc4). The root cause is a classic use-after-free condition (CWE-416) where memory is accessed after being freed due to improper synchronization between concurrent operations on RPC sessions. The fix involves adding proper locking mechanisms (rpc_lock) to the session structure to prevent the race condition between opening and closing RPC sessions.

RemediationAI

Apply the available kernel patches by updating to versions containing the fixes: commits 1067361a1cc6ad9cdf7acfc47f90012b72ad1502, 6323fec65fe54b365961fed260dd579191e46121, 8fb3b6c85b7e3127161623586b62abcc366caa20, a1f46c99d9ea411f9bf30025b912d881d36fc709, or a4348710a7267705b75692dc1a000920481d1d92 depending on your kernel branch. For systems that cannot be immediately patched, consider disabling the ksmbd module if SMB server functionality is not required, or restricting local access to trusted users only. Monitor kernel.org and your distribution's security advisories for updated kernel packages containing these fixes.

CVE-2022-0847 HIGH POC
7.8 Mar 10

Linux kernel contains a flaw known as 'Dirty Pipe' where improper pipe buffer flag initialization allows unprivileged lo

CVE-2015-1328 HIGH POC
7.8 Nov 28

The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does no

CVE-2017-7308 HIGH POC
7.8 Mar 29

The packet_set_ring function in net/packet/af_packet.c in the Linux kernel through 4.10.6 does not properly validate cer

CVE-2017-16995 HIGH POC
7.8 Dec 27

The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial

CVE-2017-1000112 HIGH POC
7.0 Oct 05

Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. Rated high severity (CVSS 7.0). Public ex

CVE-2015-8660 MEDIUM POC
6.7 Dec 28

The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr op

CVE-2012-0056 MEDIUM POC
6.9 Jan 27

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when

CVE-2014-0038 MEDIUM POC
6.9 Feb 06

The compat_sys_recvmmsg function in net/compat.c in the Linux kernel before 3.13.2, when CONFIG_X86_X32 is enabled, allo

CVE-2016-8655 HIGH POC
7.8 Dec 08

Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cau

CVE-2016-0728 HIGH POC
7.8 Feb 08

The join_session_keyring function in security/keys/process_keys.c in the Linux kernel before 4.4.1 mishandles object ref

CVE-2017-0561 CRITICAL POC
9.8 Apr 07

A remote code execution vulnerability in the Broadcom Wi-Fi firmware could enable a remote attacker to execute arbitrary

CVE-2022-2588 MEDIUM POC
5.3 Jan 08

It was discovered that the cls_route filter implementation in the Linux kernel would not remove an old filter from the h

Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed

Share

CVE-2025-37926 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy