CVE-2025-37776 — Use After Free in Linux

CWE-416 — Use After Free12 documents7 sources
Severity
7.0HIGHNVD
EPSS
0.1%
top 79.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
LinuxLinux KernelDebian Linux+3 more
Timeline
PublishedMay 1
Latest updateJul 8

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_break_all_levII_oplock that can cause racy issues when unlocking in the middle of the loop. This patch use read lock to protect whole loop.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages8 packages

▶NVDlinux/linux_kernel5.15 — 6.6.88+3
▶Debianlinux/linux_kernel< 6.12.25-1+1
▶Ubuntulinux/linux_kernel< 6.14.0-22.22

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

5
OSV
linux-aws, linux-oracle vulnerabilities↗2025-07-08
▶
OSV
linux-azure vulnerabilities↗2025-06-26
▶
OSV
linux, linux-gcp, linux-raspi, linux-realtime vulnerabilities↗2025-06-24
▶
GHSA
GHSA-68wc-qrqf-rfh5: In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb↗2025-05-01
▶
OSV
CVE-2025-37776: In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_break_all_levII_oplock() There is a room in smb_b↗2025-05-01
▶

📋Vendor Advisories

6
Ubuntu
Linux kernel vulnerabilities↗2025-07-08
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2025-06-26
▶
Ubuntu
Linux kernel vulnerabilities↗2025-06-24
▶
Microsoft
ksmbd: fix use-after-free in smb_break_all_levII_oplock()↗2025-05-13
▶
Red Hat
kernel: ksmbd: fix use-after-free in smb_break_all_levII_oplock()↗2025-05-01
▶