VulnerabilityPublished 1 Jul 2026Updated 6 Nov 2026

CVE-2026-53327: Linux kernel · debugobjects: Do not fill_pool() if pi_blocked_on

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in a3383df76f0d7a597066df018409eb9e5e698064 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in a3383df76f0d7a597066df018409eb9e5e698064, 33bee10644f8fff3b1a0187ad5ad34513e5e8e72, 8a680d54f1adf3e3aa815578684556716fda6f0c +3

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < a3383df76f0d7a597066df018409eb9e5e698064	Fixed in a3383df76f0d7a597066df018409eb9e5e698064
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 33bee10644f8fff3b1a0187ad5ad34513e5e8e72	Fixed in 33bee10644f8fff3b1a0187ad5ad34513e5e8e72
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 8a680d54f1adf3e3aa815578684556716fda6f0c	Fixed in 8a680d54f1adf3e3aa815578684556716fda6f0c
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 5f41161059fd0f1bbf18c90f3180e38cc45a14eb	Fixed in 5f41161059fd0f1bbf18c90f3180e38cc45a14eb
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 3f6a3b24ab7b9d51f6f4778254bef0e5847beb55	Fixed in 3f6a3b24ab7b9d51f6f4778254bef0e5847beb55
LinuxLinux	Affected ≥ 4bedcc28469a24fe481a8a31b3584e6070457ddb, < 3a408cae608d9c075dd3a9e5cfc03b3cb0726863	Fixed in 3a408cae608d9c075dd3a9e5cfc03b3cb0726863

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.

References

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