System crash via unallocated regmap IRQ type buffer
Published Oct 22, 2025 · Updated Oct 22, 2025
Null pointer dereference in Linux kernel 6.0 through 6.0.15 and 6.1 through 6.1.1 allows attackers to crash affected systems. The regmap_add_irq_chip_fwnode function allocates d->type_buf from the obsolete num_type_reg property instead of num_config_regs, leaving the buffer null before regmap_irq_set_type indexes it. The failure occurs when the WCD9335 IRQ chip uses config registers and its interrupt trigger is configured; public records do not identify an attacker-controlled route to that setup.
Summary
What happened
Null pointer dereference in Linux kernel 6.0 through 6.0.15 and 6.1 through 6.1.1 allows attackers to crash affected systems. The regmap_add_irq_chip_fwnode function allocates d->type_buf from the obsolete num_type_reg property instead of num_config_regs, leaving the buffer null before regmap_irq_set_type indexes it. The failure occurs when the WCD9335 IRQ chip uses config registers and its interrupt trigger is configured; public records do not identify an attacker-controlled route to that setup.
The record
- CVE
- CVE-2022-50558
- Published
- Oct 22, 2025
- Updated
- Oct 22, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Oct 22, 2025CVE publishedPublication date reported by the CVE source.
- Oct 22, 2025Record 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=6.0
- Affected versionversion=faa87ce9196dbb074d75bd4aecb8bacf18f19b4e <57bb34330c0fc70bb4ab96399a3c1b80e73e9d49
- Affected versionversion=faa87ce9196dbb074d75bd4aecb8bacf18f19b4e <84498d1fb35de6ab71bdfdb6270a464fb4a0951b
- Affected versionversion=faa87ce9196dbb074d75bd4aecb8bacf18f19b4e <961db32e52f4d34a9a95939a30393fd190397f84
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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