Kernel privilege escalation via ALU32 result sign-extension
Published Aug 10, 2026 · Updated Aug 10, 2026
Incorrect numeric conversion in Linux 6.7 through 7.1.5 allows local users to gain kernel privileges through a crafted BPF program. The LoongArch JIT sign-extends negative signed ALU32 division and modulo results, leaving bits 63:32 set while the verifier models them as zero. Exploitation requires local BPF program loading through unprivileged access or CAP_BPF or CAP_SYS_ADMIN and grants kernel memory read and write or a system crash.
Summary
What happened
Incorrect numeric conversion in Linux 6.7 through 7.1.5 allows local users to gain kernel privileges through a crafted BPF program. The LoongArch JIT sign-extends negative signed ALU32 division and modulo results, leaving bits 63:32 set while the verifier models them as zero. Exploitation requires local BPF program loading through unprivileged access or CAP_BPF or CAP_SYS_ADMIN and grants kernel memory read and write or a system crash.
The record
- CVE
- CVE-2026-68295
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-681, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 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=2425c9e002d2a1fdca34261b2fa6713eafef2163 <716cb29dbed4d62e9e108950a1a82bcba4cc2d45
- Affected versionversion=2425c9e002d2a1fdca34261b2fa6713eafef2163 <dacd348b8a993373576fe2ee2d8b114740ba57a6
- Affected versionversion=6.7
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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