Linux: Out-of-bounds Read
CVE-2022-49249 is a high-severity out-of-bounds read 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 adafea71b49ec4dbc44e0b84ec6eb602004a7a08, f03c0c94186d5876857132d97e28f20cdc100bdc, d09aee1b1da196be11ed86dd4897f228f2487613 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 0.27% 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 adafea71b49ec4dbc44e0b84ec6eb602004a7a08 or f03c0c94186d5876857132d97e28f20cdc100bdc or d09aee1b1da196be11ed86dd4897f228f2487613 or cc587b7c8fbbe128f6bd0dad025a0caea5e6d164, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.33 or 5.16.19 or 5.17.2, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | e8ba1e05bdc016700c85fad559a812c2e795442f up to, but not including, adafea71b49ec4dbc44e0b84ec6eb602004a7a08; e8ba1e05bdc016700c85fad559a812c2e795442f up to, but not including, f03c0c94186d5876857132d97e28f20cdc100bdc; e8ba1e05bdc016700c85fad559a812c2e795442f up to, but not including, d09aee1b1da196be11ed86dd4897f228f2487613; e8ba1e05bdc016700c85fad559a812c2e795442f up to, but not including, cc587b7c8fbbe128f6bd0dad025a0caea5e6d164; 5.14 | adafea71b49ec4dbc44e0b84ec6eb602004a7a08, f03c0c94186d5876857132d97e28f20cdc100bdc, d09aee1b1da196be11ed86dd4897f228f2487613, cc587b7c8fbbe128f6bd0dad025a0caea5e6d164 |
| Linux | Linux Kernel | 5.14 up to, but not including, 5.15.33; 5.16 up to, but not including, 5.16.19; 5.17 up to, but not including, 5.17.2 | 5.15.33, 5.16.19, 5.17.2 |
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: ASoC: codecs: wc938x: fix accessing array out of bounds for enum type Accessing enums using integer would result in array out of bounds access on platforms like aarch64 where sizeof(long) is 8 compared to enum size which is 4 bytes. Fix this by using enumerated items instead of integers.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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