CVE-2026-53314 Details
Description
In the Linux kernel, the following vulnerability has been resolved: padata: Put CPU offline callback in ONLINE section to allow failure syzbot reported the following warning: DEAD callback error for CPU1 WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614 at commit 4ae12d8bd9a8 ("Merge tag 'kbuild-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux") which tglx traced to padata_cpu_dead() given it's the only sub-CPUHP_TEARDOWN_CPU callback that returns an error. Failure isn't allowed in hotplug states before CPUHP_TEARDOWN_CPU so move the CPU offline callback to the ONLINE section where failure is possible.
A vulnerability in the Linux kernel's padata component has been addressed. The issue arose because the CPU offline callback was not properly positioned, leading to errors when CPUs were taken offline. This vulnerability was reported by syzbot, which noted a DEAD callback error for CPU1. The warning indicated a failure in the CPU hotplug teardown process, as the callback returned an error when it was not supposed to. The problem was traced back to the padata_cpu_dead() function, which is the only sub-CPUHP_TEARDOWN_CPU callback that returns an error. To resolve this, the CPU offline callback has been moved to the ONLINE section, where failures can be handled appropriately.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the Linux kernel's official website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3e6c08dd97dcd22a00aee469e0adfa819071d80e | kernel.org | Patch |
| https://git.kernel.org/stable/c/5a9f29a3e076b637d2234093e57989cf755ded5b | kernel.org | Patch |
| https://git.kernel.org/stable/c/65dae8b34f0810f3fa9f77c4c63650cd20820693 | kernel.org | Patch |
| https://git.kernel.org/stable/c/9afe53f14a2aae8c4beb30e5ea51641a34f1a3d3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a6d44f477000c6352de6b05e9e276e62083e5fbf | kernel.org | Patch |
| https://git.kernel.org/stable/c/c8c4a2972f83c8b68ff03b43cecdb898939ff851 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.19.202, < 4.20 >= 5.4.22, < 5.5 >= 5.5.6, < 6.1.175 >= 6.2, < 6.6.141 >= 6.7, < 6.12.91 >= 6.13, < 6.18.33 >= 6.19, < 7.0.10 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 6, 2026 | Initial Analysis | [email protected] |
| Jun 26, 2026 | New CVE Received | kernel.org |