Linux: Out-of-bounds Read
CVE-2022-49145 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 b3f15609ffa521de12244cd6af24002030dda3f5, d208ea44e25b31db5a4d5e8c31df51787a3e9303, 28d5387c1994f5e1e0d41b30a1f3dd6e1f609252 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 0.28% 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 b3f15609ffa521de12244cd6af24002030dda3f5 or d208ea44e25b31db5a4d5e8c31df51787a3e9303 or 28d5387c1994f5e1e0d41b30a1f3dd6e1f609252 or cb249f8c00f40dba83b7da8207ac14ca46e9ec9e, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.9.311 or 4.14.276 or 4.19.238 or 5.4.189, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, b3f15609ffa521de12244cd6af24002030dda3f5; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, d208ea44e25b31db5a4d5e8c31df51787a3e9303; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, 28d5387c1994f5e1e0d41b30a1f3dd6e1f609252; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, cb249f8c00f40dba83b7da8207ac14ca46e9ec9e; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, e5b681822cac1f8093759b02e16c06b2c64b6788; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, 97b5593fd1b182b3fdb180b6bbe64ec09669988b; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, b80b19b32a432c9eee1cd200ef7aaddf608f54d1; 337aadff8e4567e39669e07d9a88b789d78458b5 up to, but not including, d7339f2a3938fb56b5f28d53f5345900b5fa0e74; and 2 more ranges | b3f15609ffa521de12244cd6af24002030dda3f5, d208ea44e25b31db5a4d5e8c31df51787a3e9303, 28d5387c1994f5e1e0d41b30a1f3dd6e1f609252, cb249f8c00f40dba83b7da8207ac14ca46e9ec9e, e5b681822cac1f8093759b02e16c06b2c64b6788, 97b5593fd1b182b3fdb180b6bbe64ec09669988b |
| Linux | Linux Kernel | 4.4 up to, but not including, 4.9.311; 4.10 up to, but not including, 4.14.276; 4.15 up to, but not including, 4.19.238; 4.20 up to, but not including, 5.4.189; 5.5 up to, but not including, 5.10.110; 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 | 4.9.311, 4.14.276, 4.19.238, 5.4.189, 5.10.110, 5.15.33 |
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: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data If the NumEntries field in the _CPC return package is less than 2, do not attempt to access the "Revision" element of that package, because it may not be present then. BugLink: https://lore.kernel.org/lkml/20220322143534.GC32582@xsang-OptiPlex-9020/
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
- git.kernel.org/stable/c/28d5387c1994f5e1e0d41b30a1f3dd6e1f609252
- git.kernel.org/stable/c/40d8abf364bcab23bc715a9221a3c8623956257b
- git.kernel.org/stable/c/97b5593fd1b182b3fdb180b6bbe64ec09669988b
- git.kernel.org/stable/c/b3f15609ffa521de12244cd6af24002030dda3f5
- git.kernel.org/stable/c/b80b19b32a432c9eee1cd200ef7aaddf608f54d1
- git.kernel.org/stable/c/cb249f8c00f40dba83b7da8207ac14ca46e9ec9e
- git.kernel.org/stable/c/d208ea44e25b31db5a4d5e8c31df51787a3e9303
- git.kernel.org/stable/c/d7339f2a3938fb56b5f28d53f5345900b5fa0e74
- git.kernel.org/stable/c/e5b681822cac1f8093759b02e16c06b2c64b6788
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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