CVE-2024-49954
static_call: Replace pointless WARN_ON() in static_call_module_notify()
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Description
In the Linux kernel, the following vulnerability has been resolved: static_call: Replace pointless WARN_ON() in static_call_module_notify() static_call_module_notify() triggers a WARN_ON(), when memory allocation fails in __static_call_add_module(). That's not really justified, because the failure case must be correctly handled by the well known call chain and the error code is passed through to the initiating userspace application. A memory allocation fail is not a fatal problem, but the WARN_ON() takes the machine out when panic_on_warn is set. Replace it with a pr_warn().
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/85a104aaef1f56623acc10ba4c42d5f046ba65b7
- https://git.kernel.org/stable/c/b83bef74c121a3311240fc4002d23486b85355e4
- https://git.kernel.org/stable/c/bc9356513d56b688775497b7ac6f2b967f46a80c
- https://git.kernel.org/stable/c/e67534bd31d79952b50e791e92adf0b3e6c13b8c
- https://git.kernel.org/stable/c/ea2cdf4da093d0482f0ef36ba971e2e0c7673425
References (7)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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