Linux: Out-of-bounds Read
CVE-2023-52827 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 79527c21a3ce04cffc35ea54f74ee087e532be57, c9e44111da221246efb2e623ae1be40a5cf6542c, 1bc44a505a229bb1dd4957e11aa594edeea3690e 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 0.26% 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 79527c21a3ce04cffc35ea54f74ee087e532be57 or c9e44111da221246efb2e623ae1be40a5cf6542c or 1bc44a505a229bb1dd4957e11aa594edeea3690e, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.5.13 or 6.6.3, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | d889913205cf7ebda905b1e62c5867ed4e39f6c2 up to, but not including, 79527c21a3ce04cffc35ea54f74ee087e532be57; d889913205cf7ebda905b1e62c5867ed4e39f6c2 up to, but not including, c9e44111da221246efb2e623ae1be40a5cf6542c; d889913205cf7ebda905b1e62c5867ed4e39f6c2 up to, but not including, 1bc44a505a229bb1dd4957e11aa594edeea3690e; 6.3 | 79527c21a3ce04cffc35ea54f74ee087e532be57, c9e44111da221246efb2e623ae1be40a5cf6542c, 1bc44a505a229bb1dd4957e11aa594edeea3690e |
| Linux | Linux Kernel | before 6.5.13; 6.6 up to, but not including, 6.6.3 | 6.5.13, 6.6.3 |
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 | 7.7 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix possible out-of-bound read in ath12k_htt_pull_ppdu_stats() len is extracted from HTT message and could be an unexpected value in case errors happen, so add validation before using to avoid possible out-of-bound read in the following message iteration and parsing. The same issue also applies to ppdu_info->ppdu_stats.common.num_users, so validate it before using too. These are found during code review. Compile test only.
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 7.8 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.8 High severity
- 7.1 High severity
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