Linux: Use of Uninitialized Resource
CVE-2024-43815 is a high-severity use of uninitialized resource vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions e1640fed0377bf7276efb70d03cb821a6931063d, dd52b5eeb0f70893f762da7254e923fd23fd1379 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.21% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to e1640fed0377bf7276efb70d03cb821a6931063d or dd52b5eeb0f70893f762da7254e923fd23fd1379, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.10.3 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 3d16af0b4cfac4b2c3b238e2ec37b38c2f316978 up to, but not including, e1640fed0377bf7276efb70d03cb821a6931063d; 3d16af0b4cfac4b2c3b238e2ec37b38c2f316978 up to, but not including, dd52b5eeb0f70893f762da7254e923fd23fd1379; 6.10 | e1640fed0377bf7276efb70d03cb821a6931063d, dd52b5eeb0f70893f762da7254e923fd23fd1379 |
| Linux | Linux Kernel | 6.10 up to, but not including, 6.10.3 | 6.10.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
Official description
In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - Ensure payload is zero when using key slot We could leak stack memory through the payload field when running AES with a key from one of the hardware's key slots. Fix this by ensuring the payload field is set to 0 in such cases. This does not affect the common use case when the key is supplied from main memory via the descriptor payload.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Uninitialized Resource
The product uses or accesses a resource that has not been initialized.
How developers prevent this class of flaw
- Explicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all required steps.
- Pay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
- Avoid race conditions (CWE-362) during initialization routines.
More Use of Uninitialized Resource vulnerabilities (CWE-908)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Use of Uninitialized Resource vulnerabilities
- 8.2 High severity
- 8.8 High severity
- 7.0 High severity
- 7.5 High severity
- 7.1 High severity
- 7.8 High severity
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