Linux: Out-of-bounds Read
CVE-2022-49251 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 966408e37d84b762d11978b7bfb03fff0c6222ad, 4a799972a283ab4ec031041304d7e2d34e1a16eb, c0099bbf8bc85d30c4cf38220fca3c8d4253fa7f 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 966408e37d84b762d11978b7bfb03fff0c6222ad or 4a799972a283ab4ec031041304d7e2d34e1a16eb or c0099bbf8bc85d30c4cf38220fca3c8d4253fa7f or 0ea5eff7c6063a8f124188424f8e4c6727f35051, 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 | 908e6b1df26efc9d2df70c9a7bf4f5eae5c5702f up to, but not including, 966408e37d84b762d11978b7bfb03fff0c6222ad; 908e6b1df26efc9d2df70c9a7bf4f5eae5c5702f up to, but not including, 4a799972a283ab4ec031041304d7e2d34e1a16eb; 908e6b1df26efc9d2df70c9a7bf4f5eae5c5702f up to, but not including, c0099bbf8bc85d30c4cf38220fca3c8d4253fa7f; 908e6b1df26efc9d2df70c9a7bf4f5eae5c5702f up to, but not including, 0ea5eff7c6063a8f124188424f8e4c6727f35051; 5.11 | 966408e37d84b762d11978b7bfb03fff0c6222ad, 4a799972a283ab4ec031041304d7e2d34e1a16eb, c0099bbf8bc85d30c4cf38220fca3c8d4253fa7f, 0ea5eff7c6063a8f124188424f8e4c6727f35051 |
| Linux | Linux Kernel | 5.11 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: va-macro: 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.
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
Spotted an error? Tell us.