Linux: Out-of-bounds Read
CVE-2022-50147 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 44652154484e7e3d12008802cfb6c28a8aa16d85, 8176f6a0d9c1b06bc7af7c3d6acd4a66448939df, d1b5113674c3e95bb53c601ce2ea4719e851c74d 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 0.21% 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 44652154484e7e3d12008802cfb6c28a8aa16d85 or 8176f6a0d9c1b06bc7af7c3d6acd4a66448939df or d1b5113674c3e95bb53c601ce2ea4719e851c74d or 000eca5d044d1ee23b4ca311793cf3fc528da6c6, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.61 or 5.18.18 or 5.19.2, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | e130242dc351f1cfa2bbeb6766a1486ce936ef88 up to, but not including, 44652154484e7e3d12008802cfb6c28a8aa16d85; e130242dc351f1cfa2bbeb6766a1486ce936ef88 up to, but not including, 8176f6a0d9c1b06bc7af7c3d6acd4a66448939df; e130242dc351f1cfa2bbeb6766a1486ce936ef88 up to, but not including, d1b5113674c3e95bb53c601ce2ea4719e851c74d; e130242dc351f1cfa2bbeb6766a1486ce936ef88 up to, but not including, 000eca5d044d1ee23b4ca311793cf3fc528da6c6; 5.15 | 44652154484e7e3d12008802cfb6c28a8aa16d85, 8176f6a0d9c1b06bc7af7c3d6acd4a66448939df, d1b5113674c3e95bb53c601ce2ea4719e851c74d, 000eca5d044d1ee23b4ca311793cf3fc528da6c6 |
| Linux | Linux Kernel | 5.15 up to, but not including, 5.15.61; 5.16 up to, but not including, 5.18.18; 5.19 up to, but not including, 5.19.2 | 5.15.61, 5.18.18, 5.19.2 |
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: mm/mempolicy: fix get_nodes out of bound access When user specified more nodes than supported, get_nodes will access nmask array out of bounds.
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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