CVE-2023-53326 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer Dereference5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 95.84%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 16

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc: Don't try to copy PPR for task with NULL pt_regs powerpc sets up PF_KTHREAD and PF_IO_WORKER with a NULL pt_regs, which from my (arguably very short) checking is not commonly done for other archs. This is fine, except when PF_IO_WORKER's have been created and the task does something that causes a coredump to be generated. Then we get this crash: Kernel attempted to read user page (160) - exploit attempt? (uid: 1000) …

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 Packages4 packages

▶NVDlinux/linux_kernel4.8 — 5.10.177+4
▶Debianlinux/linux_kernel< 5.10.178-1+3
▶CVEListV5linux/linuxfa439810cc1b3c927ec24ede17d02467e1b143a1 — 80a4200d51e5a7e046f4a90f5faa5bafd5a60c58+5
▶debiandebian/linux< linux 6.1.25-1 (bookworm)

Patches

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

🔴Vulnerability Details

2
GHSA
GHSA-xr8h-4cmg-pxjm: In the Linux kernel, the following vulnerability has been resolved: powerpc: Don't try to copy PPR for task with NULL pt_regs powerpc sets up PF_KTH↗2025-09-16
▶
OSV
CVE-2023-53326: In the Linux kernel, the following vulnerability has been resolved: powerpc: Don't try to copy PPR for task with NULL pt_regs powerpc sets up PF_KTHRE↗2025-09-16
▶

📋Vendor Advisories

2
Red Hat
kernel: powerpc: Don't try to copy PPR for task with NULL pt_regs↗2025-09-16
▶
Debian
CVE-2023-53326: linux - In the Linux kernel, the following vulnerability has been resolved: powerpc: Do...↗2023
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CVE-2023-53326 — NULL Pointer Dereference in Linux | cvebase