CVE-2026-31689

MEDIUM EPSS 1.8%
Published Apr 27, 20262mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
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Published Apr 27, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: EDAC/mc: Fix error path ordering in edac_mc_alloc() When the mci->pvt_info allocation in edac_mc_alloc() fails, the error path will call put_device() which will end up calling the device's release function. However, the init ordering is wrong such that device_initialize() happens *after* the failed allocation and thus the device itself and the release function pointer are not initialized yet when they're called: MCE: In-kernel MCE decoding enabled. ------------[ cut here ]------------ kobject: '(null)': is not initialized, yet kobject_put() is being called. WARNING: lib/kobject.c:734 at kobject_put, CPU#22: systemd-udevd CPU: 22 UID: 0 PID: 538 Comm: systemd-udevd Not tainted 7.0.0-rc1+ #2 PREEMPT(full) RIP: 0010:kobject_put Call Trace: <TASK> edac_mc_alloc+0xbe/0xe0 [edac_core] amd64_edac_init+0x7a4/0xff0 [amd64_edac] ? __pfx_amd64_edac_init+0x10/0x10 [amd64_edac] do_one_initcall ... Reorder the calling sequence so that the device is initialized and thus the release function pointer is properly set before it can be used. This was found by Claude while reviewing another EDAC patch.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥5.19  –  <6.1.169
linuxlinux_kernel*≥6.2  –  <6.6.135
linuxlinux_kernel*≥6.7  –  <6.12.82
linuxlinux_kernel*≥6.13  –  <6.18.23
linuxlinux_kernel*≥6.19  –  <6.19.13
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715
    Patch