CVE-2026-53327
debugobjects: Do not fill_pool() if pi_blocked_on
Description
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked_on is set, because a task can obviously only block on one lock as otherwise the priority inheritenace chain gets corrupted. Prevent this by expanding the conditional to take current::pi_blocked_on into account.
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
- Update the Linux kernel to the latest version.
- Ensure RT kernels account for pi_blocked_on.
- Apply the provided patch to the kernel.
Public PoC/Exploit Available at Github
CVE-2026-53327 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-53327.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53327 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-2026-53327
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).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53327 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53327 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 NVD-CWE-noinfo 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:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.144 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.95 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 6.1.177 Added Reference Type kernel.org: https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064 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/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55 Added Reference https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c Added Reference https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '3a408cae608d9c075dd3a9e5cfc03b3cb0726863', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '33bee10644f8fff3b1a0187ad5ad34513e5e8e72', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '5f41161059fd0f1bbf18c90f3180e38cc45a14eb', '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': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'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': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '8a680d54f1adf3e3aa815578684556716fda6f0c', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': 'a3383df76f0d7a597066df018409eb9e5e698064', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '3f6a3b24ab7b9d51f6f4778254bef0e5847beb55', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '3a408cae608d9c075dd3a9e5cfc03b3cb0726863', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '33bee10644f8fff3b1a0187ad5ad34513e5e8e72', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '5f41161059fd0f1bbf18c90f3180e38cc45a14eb', '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': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.177', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.144', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.95', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'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': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '3a408cae608d9c075dd3a9e5cfc03b3cb0726863', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '33bee10644f8fff3b1a0187ad5ad34513e5e8e72', 'versionType': 'git'}, {'status': 'affected', 'version': '4bedcc28469a24fe481a8a31b3584e6070457ddb', 'lessThan': '5f41161059fd0f1bbf18c90f3180e38cc45a14eb', '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': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'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: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked_on is set, because a task can obviously only block on one lock as otherwise the priority inheritenace chain gets corrupted. Prevent this by expanding the conditional to take current::pi_blocked_on into account. Added Reference https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72 Added Reference https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863 Added Reference https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb