Linux: Access of Uninitialized Pointer
CVE-2024-26799 is a high-severity access of uninitialized pointer vulnerability in Linux, with a CVSS 3.1 base score of 7.0 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 3301f5513e668d47514f32b0fea39e85b1152010, 99adc8b4d2f38bf0d06483ec845bc48f60c3f8cf, d5a7726e6ea62d447b79ab5baeb537ea6bdb225b 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 0.24% 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 3301f5513e668d47514f32b0fea39e85b1152010 or 99adc8b4d2f38bf0d06483ec845bc48f60c3f8cf or d5a7726e6ea62d447b79ab5baeb537ea6bdb225b or 1382d8b55129875b2e07c4d2a7ebc790183769ee, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.6.21 or 6.7.9, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | b81af585ea54ee9f749391e594ee9cbd44061eae up to, but not including, 3301f5513e668d47514f32b0fea39e85b1152010; b81af585ea54ee9f749391e594ee9cbd44061eae up to, but not including, 99adc8b4d2f38bf0d06483ec845bc48f60c3f8cf; b81af585ea54ee9f749391e594ee9cbd44061eae up to, but not including, d5a7726e6ea62d447b79ab5baeb537ea6bdb225b; b81af585ea54ee9f749391e594ee9cbd44061eae up to, but not including, 1382d8b55129875b2e07c4d2a7ebc790183769ee; 5.18 | 3301f5513e668d47514f32b0fea39e85b1152010, 99adc8b4d2f38bf0d06483ec845bc48f60c3f8cf, d5a7726e6ea62d447b79ab5baeb537ea6bdb225b, 1382d8b55129875b2e07c4d2a7ebc790183769ee |
| Linux | Linux Kernel | 5.18 up to, but not including, 6.6.21; 6.7 up to, but not including, 6.7.9; 6.8 | 6.6.21, 6.7.9 |
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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.0 | High | CNA |
| CVSS 3.1 | 6.2 | Medium | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: ASoC: qcom: Fix uninitialized pointer dmactl In the case where __lpass_get_dmactl_handle is called and the driver id dai_id is invalid the pointer dmactl is not being assigned a value, and dmactl contains a garbage value since it has not been initialized and so the null check may not work. Fix this to initialize dmactl to NULL. One could argue that modern compilers will set this to zero, but it is useful to keep this initialized as per the same way in functions __lpass_platform_codec_intf_init and lpass_cdc_dma_daiops_hw_params. Cleans up clang scan build warning: sound/soc/qcom/lpass-cdc-dma.c:275:7: warning: Branch condition evaluates to a garbage value [core.uninitialized.Branch]
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Uninitialized Pointer
The product accesses or uses a pointer that has not been initialized.
More Access of Uninitialized Pointer vulnerabilities (CWE-824)
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
Other references
Recent Access of Uninitialized Pointer vulnerabilities
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