Linux: Out-of-bounds Read
CVE-2024-50123 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 6d79f12c0ce2bc8ff5f109093df1734bd6450615, c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5 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 6d79f12c0ce2bc8ff5f109093df1734bd6450615 or c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.11.6 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 699c23f02c65cbfc3e638f14ce0d70c23a2e1f02 up to, but not including, 6d79f12c0ce2bc8ff5f109093df1734bd6450615; 699c23f02c65cbfc3e638f14ce0d70c23a2e1f02 up to, but not including, c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5; 6.10 | 6d79f12c0ce2bc8ff5f109093df1734bd6450615, c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5 |
| Linux | Linux Kernel | 6.10 up to, but not including, 6.11.6; 6.12 | 6.11.6 |
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 | NVD |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: bpf: Add the missing BPF_LINK_TYPE invocation for sockmap There is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap link fd. Fix it by adding the missing BPF_LINK_TYPE invocation for sockmap link Also add comments for bpf_link_type to prevent missing updates in the future.
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
- 8.2 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
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