Linux: Out-of-bounds Read
CVE-2022-48739 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 10007bd96b6c4c3cfaea9e76c311b06a07a5e260, 1552e66be325a21d7eff49f46013fb402165a0ac, 06feec6005c9d9500cd286ec440aabf8b2ddd94d 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 0.23% 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 10007bd96b6c4c3cfaea9e76c311b06a07a5e260 or 1552e66be325a21d7eff49f46013fb402165a0ac or 06feec6005c9d9500cd286ec440aabf8b2ddd94d, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.22 or 5.16.8, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 up to, but not including, 10007bd96b6c4c3cfaea9e76c311b06a07a5e260; 7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 up to, but not including, 1552e66be325a21d7eff49f46013fb402165a0ac; 7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 up to, but not including, 06feec6005c9d9500cd286ec440aabf8b2ddd94d; 5.14 | 10007bd96b6c4c3cfaea9e76c311b06a07a5e260, 1552e66be325a21d7eff49f46013fb402165a0ac, 06feec6005c9d9500cd286ec440aabf8b2ddd94d |
| Linux | Linux Kernel | before 5.15.22; 5.16 up to, but not including, 5.16.8; 5.17 | 5.15.22, 5.16.8 |
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 | 7.1 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: ASoC: hdmi-codec: Fix OOB memory accesses Correct size of iec_status array by changing it to the size of status array of the struct snd_aes_iec958. This fixes out-of-bounds slab read accesses made by memcpy() of the hdmi-codec driver. This problem is reported by KASAN.
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
- 7.1 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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