Linux: Out-of-bounds Read
CVE-2022-50079 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 82a27c1855445d48aacc67b0c0640f3dadebe52f, 4c31dca1799612eb3b6413e3e574f90c3fb8f865, 89b008222c2bf21e50219725caed31590edfd9d1 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 0.29% 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 82a27c1855445d48aacc67b0c0640f3dadebe52f or 4c31dca1799612eb3b6413e3e574f90c3fb8f865 or 89b008222c2bf21e50219725caed31590edfd9d1, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.63 or 5.19.4, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | cd6d421e3d1ad5926b74091254e345db730e7706 up to, but not including, 82a27c1855445d48aacc67b0c0640f3dadebe52f; cd6d421e3d1ad5926b74091254e345db730e7706 up to, but not including, 4c31dca1799612eb3b6413e3e574f90c3fb8f865; cd6d421e3d1ad5926b74091254e345db730e7706 up to, but not including, 89b008222c2bf21e50219725caed31590edfd9d1; 5.14 | 82a27c1855445d48aacc67b0c0640f3dadebe52f, 4c31dca1799612eb3b6413e3e574f90c3fb8f865, 89b008222c2bf21e50219725caed31590edfd9d1 |
| Linux | Linux Kernel | 5.14 up to, but not including, 5.15.63; 5.16 up to, but not including, 5.19.4; 6.0 | 5.15.63, 5.19.4 |
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.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.0 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check correct bounds for stream encoder instances for DCN303 [Why & How] eng_id for DCN303 cannot be more than 1, since we have only two instances of stream encoders. Check the correct boundary condition for engine ID for DCN303 prevent the potential out of bounds access.
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
- 7.5 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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