debugobjects: Do not fill_pool() if pi_blocked_on
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.177, 6.6.144, 6.12.95 +3Red Hat: 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15 and later | 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.13, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 5.15 and later Fixed in 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.13, 7.1 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15 to before 6.1.177; 6.2 to before 6.6.144; 6.7 to before 6.12.95; 6.13 to before 6.18.37; 6.19 to before 7.0.13 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | 7.1 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | 7.1 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | 7.1 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | 7.1 rc4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15 to before 6.1.177; 6.2 to before 6.6.144; 6.7 to before 6.12.95; 6.13 to before 6.18.37; 6.19 to before 7.0.13 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.13, 7.1
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53327
- 2026-10-03 Alias added: GHSA-6w3p-w4p9-rj2h
- 2026-11-06 CISA SSVC decision points changed
References
Patch 6
- https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c
- https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064
- https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55
- https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863
- https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72
- https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb
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Sources
- CVE-2026-53327 · CVE Program
- CVE-2026-53327 · NVD
- FIRST EPSS
- GHSA-6w3p-w4p9-rj2h · GitHub Advisory Database · CC BY 4.0
- CVE-2026-53327 · Red Hat security data · CC BY 4.0
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