CVE-2026-43178

HIGH EPSS 3.6%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
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

Threat Intelligence

EPSS Exploit Probability
3.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-415

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥6.12.70  –  <6.12.75
linuxlinux_kernel*≥6.18.10  –  <6.18.16
linuxlinux_kernel*≥6.19.1  –  <6.19.6
linuxlinux_kernel6.19any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa
    Patch