CVE-2025-21844 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer Dereference52 documents7 sources
Severity
5.5MEDIUMNVD
OSV8.8OSV7.8
EPSS
0.1%
top 81.35%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
LinuxLinux KernelDebian Linux+3 more
Timeline
PublishedMar 12
Latest updateSep 3

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: Add check for next_buffer in receive_encrypted_standard() Add check for the return value of cifs_buf_get() and cifs_small_buf_get() in receive_encrypted_standard() to prevent null pointer dereference.

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 Packages8 packages

▶NVDlinux/linux_kernel6.1.69 — 6.1.130+6
▶Debianlinux/linux_kernel< 5.10.237-1+3
▶Ubuntulinux/linux_kernel< 5.15.0-140.150+1

Patches

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

🔴Vulnerability Details

25
OSV
linux-azure, linux-azure-6.8, linux-azure-nvidia vulnerabilities↗2025-09-03
▶
OSV
linux-gke, linux-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-raspi vulnerabilities↗2025-08-28
▶
OSV
linux-raspi-realtime vulnerabilities↗2025-08-26
▶
OSV
linux-oracle, linux-oracle-6.8 vulnerabilities↗2025-08-21
▶
OSV
linux-aws-6.8, linux-gcp, linux-gcp-6.8, linux-gkeop, linux-ibm, linux-ibm-6.8 vulnerabilities↗2025-08-20
▶

📋Vendor Advisories

26
Ubuntu
Linux kernel (Azure) vulnerabilities↗2025-09-03
▶
Ubuntu
Linux kernel vulnerabilities↗2025-08-28
▶
Ubuntu
Linux kernel (Raspberry Pi Real-time) vulnerabilities↗2025-08-26
▶
Ubuntu
Linux kernel (Oracle) vulnerabilities↗2025-08-21
▶
Ubuntu
Linux kernel vulnerabilities↗2025-08-20
▶
CVE-2025-21844 — NULL Pointer Dereference in Linux | cvebase