CVE-2021-44879 — NULL Pointer Dereference in Kernel

CWE-476 — NULL Pointer Dereference20 documents8 sources
Severity
5.5MEDIUMNVD
OSV4.6
EPSS
0.1%
top 79.93%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Linux KernelDebian LinuxMsrc Cbl2 Kernel 5.15.26.1-1 ON CBL Mariner 2.0+1 more
Timeline
PublishedFeb 14
Latest updateAug 14

Description

In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL pointer dereference.

CVSS vector

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

Affected Packages6 packages

▶NVDlinux/linux_kernel< 5.16.3
▶Debianlinux/linux_kernel< 5.10.205-2+3
▶Ubuntulinux/linux_kernel< 5.4.0-173.191
▶debiandebian/linux< linux 5.16.7-1 (bookworm)

Patches

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

🔴Vulnerability Details

9
OSV
linux-azure, linux-azure-5.4 vulnerabilities↗2024-03-25
▶
OSV
linux-aws, linux-aws-5.4 vulnerabilities↗2024-03-19
▶
OSV
linux-ibm, linux-ibm-5.4, linux-oracle, linux-oracle-5.4 vulnerabilities↗2024-03-13
▶
OSV
linux-bluefield, linux-raspi-5.4, linux-xilinx-zynqmp vulnerabilities↗2024-03-11
▶
OSV
linux, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-iot, linux-kvm, linux-raspi vulnerabilities↗2024-03-06
▶

📋Vendor Advisories

10
CISA ICS
Siemens SINEC OS↗2025-08-14
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2024-03-25
▶
Ubuntu
Linux kernel (AWS) vulnerabilities↗2024-03-19
▶
Ubuntu
Linux kernel vulnerabilities↗2024-03-13
▶
Ubuntu
Linux kernel vulnerabilities↗2024-03-11
▶