Local service interruption via signed shift overflow
Published Feb 27, 2025 · Updated May 23, 2026
Integer overflow in Linux kernel printk on affected releases allows local users to interrupt service through a signed 32-bit shift. The LOG_BUF_LEN_MAX definition evaluates 1 << 31 as a signed int in kernel/printk/printk.c, invoking undefined behavior instead of an unsigned shift. Exploitation requires local low-privileged access and a 32-bit build; the published impact is limited to availability, with no confidentiality or integrity effect.
Summary
What happened
Integer overflow in Linux kernel printk on affected releases allows local users to interrupt service through a signed 32-bit shift. The LOG_BUF_LEN_MAX definition evaluates 1 << 31 as a signed int in kernel/printk/printk.c, invoking undefined behavior instead of an unsigned shift. Exploitation requires local low-privileged access and a 32-bit build; the published impact is limited to availability, with no confidentiality or integrity effect.
The record
- CVE
- CVE-2024-58017
- Published
- Feb 27, 2025
- Updated
- May 23, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 27, 2025CVE publishedPublication date reported by the CVE source.
- May 23, 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?
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- Affected versionversion=0 <*
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
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Your stack
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