ftrace: Add global mutex to serialize trace_parser access
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when a trace file is opened, and is subsequently used across write and release handlers to parse user input. The affected handler paths and their specific functions are: - Open paths: ftrace_regex_open(), ftrace_graph_open() - Write paths: ftrace_regex_write(), ftrace_graph_write() - Release paths: ftrace_regex_release(), ftrace_graph_release() If userspace opens a trace file descriptor and shares it across multiple threads, concurrent write calls will race on the parser's internal state, specifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted input or undefined behavior. Fix this by adding a global mutex, parser_lock, to serialize all access to trace_parser across write and release paths, preventing concurrent corruption of parser state.
Why it matters now
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 | 2.6.32 and later | 5.10.266, 5.15.217, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.32 and later Fixed in 5.10.266, 5.15.217, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.266, 5.15.217, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux for NVIDIA 26
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-68146
- 2026-10-03 Alias added: GHSA-vcpv-vm68-v468
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CISA SSVC decision points changed
References
Other 8
- https://git.kernel.org/stable/c/a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f
- https://git.kernel.org/stable/c/db76744d588086695371ecdd982694395628ba48
- https://git.kernel.org/stable/c/1474fe4453505b6be720b5bb94be1c927de3314a
- https://git.kernel.org/stable/c/3d0dd138a06c782f8b755cd1b6f9909494514ce1
- https://git.kernel.org/stable/c/90be137813e1a5bdfd671e40fe28004fb959d3e4
- https://git.kernel.org/stable/c/65bf73bee1a4f3722208ae46afc0fa5de76b9a0a
- https://git.kernel.org/stable/c/e807c9193d9493c7a0d039158ebb955050a76df1
- https://git.kernel.org/stable/c/7720b63bcef3f54c7fe288774b720a227d54a306
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Sources
- CVE-2026-68146 · CVE Program
- CVE-2026-68146 · NVD
- FIRST EPSS
- GHSA-vcpv-vm68-v468 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-68146 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences