Linux: Out-of-bounds Read
CVE-2022-49250 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 9208ecc703b5ed5b12d7ea13c79207f4c8456638, 87a2b44cb3005d30c3a72234d1e47b03ae3bb29a, 6aa8ef9535dbd561293406608ebe791627b10196 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 9208ecc703b5ed5b12d7ea13c79207f4c8456638 or 87a2b44cb3005d30c3a72234d1e47b03ae3bb29a or 6aa8ef9535dbd561293406608ebe791627b10196 or 42c709c4e1ce4c136891530646c9abd5dff3524f, 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 | 4f692926f562ff48abfcca6b16f36ff8d57473b6 up to, but not including, 9208ecc703b5ed5b12d7ea13c79207f4c8456638; 4f692926f562ff48abfcca6b16f36ff8d57473b6 up to, but not including, 87a2b44cb3005d30c3a72234d1e47b03ae3bb29a; 4f692926f562ff48abfcca6b16f36ff8d57473b6 up to, but not including, 6aa8ef9535dbd561293406608ebe791627b10196; 4f692926f562ff48abfcca6b16f36ff8d57473b6 up to, but not including, 42c709c4e1ce4c136891530646c9abd5dff3524f; 5.12 | 9208ecc703b5ed5b12d7ea13c79207f4c8456638, 87a2b44cb3005d30c3a72234d1e47b03ae3bb29a, 6aa8ef9535dbd561293406608ebe791627b10196, 42c709c4e1ce4c136891530646c9abd5dff3524f |
| Linux | Linux Kernel | 5.12 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: rx-macro: fix accessing compander for aux AUX interpolator does not have compander, so check before accessing compander data for this. Without this checkan array of out bounds access will be made in comp_enabled[] array.
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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