CVE-2026-53326
debugobjects: Don't call fill_pool() in early boot hardirq context
Description
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't call fill_pool() in early boot hardirq context When booting a debug PREEMPT_RT kernel on an ARM64 system, a "inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage" lockdep warning message was reported to the console. During early boot, interrupts are enabled before the scheduler is enabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can fire and in the hard interrupt context handler attempt to fill the pool This can lead to a deadlock when the interrupt occurred when the interrupt hits a region which holds a lock that is required to be taken in the allocation path. Add a new can_fill_pool() helper and reorder the exception rule and forbid this scenario by excluding allocations from hard interrupt context.
INFO
Published Date :
July 1, 2026, 2:16 p.m.
Last Modified :
July 23, 2026, 8:52 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Add a can_fill_pool() helper function.
- Exclude allocations from hard interrupt context.
- Reorder the exception rule.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53326.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53326 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53326
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53326 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53326 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-667 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 04, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab Added Reference https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6 Added Reference https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a460935022f512e167b4c5d4c12d85f89ba6aabd', 'lessThan': '44b8b03a9fb5c575548fc72c674653d6baba142a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '7bc71bdb1c1526c7f02a6adab324394ff1327b0a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '0d046ae106255cba5eb83b23f78ee93f3620247d', 'versionType': 'git'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '13abb2b11ac3b6cb89822f152e770081893e4bc3', 'lessThan': '3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6', 'versionType': 'git'}, {'status': 'affected', 'version': '0d2a64411b0974a469ff56e62441055147e5a194', 'lessThan': '5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41', 'versionType': 'git'}, {'status': 'affected', 'version': 'c93859a52b0d6953cdaa17fd7fb46a6871b015cf', 'lessThan': '27335c50014102e9077b784ebd314954286afcab', 'versionType': 'git'}, {'status': 'affected', 'version': 'a460935022f512e167b4c5d4c12d85f89ba6aabd', 'lessThan': '44b8b03a9fb5c575548fc72c674653d6baba142a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '7bc71bdb1c1526c7f02a6adab324394ff1327b0a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '0d046ae106255cba5eb83b23f78ee93f3620247d', 'versionType': 'git'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 01, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a460935022f512e167b4c5d4c12d85f89ba6aabd', 'lessThan': '44b8b03a9fb5c575548fc72c674653d6baba142a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '7bc71bdb1c1526c7f02a6adab324394ff1327b0a', 'versionType': 'git'}, {'status': 'affected', 'version': '06e0ae988f6e3499785c407429953ade19c1096b', 'lessThan': '0d046ae106255cba5eb83b23f78ee93f3620247d', 'versionType': 'git'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['lib/debugobjects.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't call fill_pool() in early boot hardirq context When booting a debug PREEMPT_RT kernel on an ARM64 system, a "inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage" lockdep warning message was reported to the console. During early boot, interrupts are enabled before the scheduler is enabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can fire and in the hard interrupt context handler attempt to fill the pool This can lead to a deadlock when the interrupt occurred when the interrupt hits a region which holds a lock that is required to be taken in the allocation path. Add a new can_fill_pool() helper and reorder the exception rule and forbid this scenario by excluding allocations from hard interrupt context. Added Reference https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d Added Reference https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a Added Reference https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a