perf sched crash via unchecked task fields
Published Aug 28, 2026 · Updated Aug 28, 2026
Memory corruption in Linux perf sched allows context-dependent attackers to crash the utility via a crafted perf.data file. register_pid() multiplies an unbounded PID into a realloc size and copies an untrusted comm string into a fixed 20-byte buffer without a length check. A target must process attacker-controlled scheduler-trace data with perf sched; the documented consequence is corruption or termination of that user-space process, not direct kernel compromise.
Summary
What happened
Memory corruption in Linux perf sched allows context-dependent attackers to crash the utility via a crafted perf.data file. register_pid() multiplies an unbounded PID into a realloc size and copies an untrusted comm string into a fixed 20-byte buffer without a length check. A target must process attacker-controlled scheduler-trace data with perf sched; the documented consequence is corruption or termination of that user-space process, not direct kernel compromise.
The record
- CVE
- CVE-2026-80671
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1204.002
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.6.32
- Affected versionversion=ec156764d424dd67283c2cd5e9f6f1b8388364ac <5949d339f5ec98752d56dcd4e36f619a59d513a5
- Affected versionversion=ec156764d424dd67283c2cd5e9f6f1b8388364ac <5ea1dcc9418c4e06ce29ed5170596f497ba86872
- Affected versionversion=ec156764d424dd67283c2cd5e9f6f1b8388364ac <652cea73b7b7b7c622a2be670e44e3c499c6d49f
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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