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.
References
Configurations
Configuration 1 (hide)
|
History
06 May 2026, 18:33
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/51520e03e70d6c73e33ee7cbe0319767d05764fe - Patch | |
| References | () https://git.kernel.org/stable/c/75825648ce984ca4cebb28e4bd2bf8c3a7e837c5 - Patch | |
| References | () https://git.kernel.org/stable/c/87ce8ae511962e105bcb3534944208c6a9471ed9 - Patch | |
| References | () https://git.kernel.org/stable/c/aae95970fad2127a1bd49d8713c7cd0677dcd2d6 - Patch | |
| References | () https://git.kernel.org/stable/c/d20e98c2df9354cc744431ad8ccbf49405b8b40f - Patch | |
| References | () https://git.kernel.org/stable/c/d3de72e2a2b9ee3a57734c1c068823e41a707715 - Patch | |
| CWE | CWE-476 | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |
27 Apr 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-27 18:16
Updated : 2026-05-06 18:33
NVD link : CVE-2026-31689
Mitre link : CVE-2026-31689
CVE.ORG link : CVE-2026-31689
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference