kernel: Out-of-bounds Read
CVE-2023-1194 is a high-severity out-of-bounds read vulnerability in kernel, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.08% chance of exploitation within 30 days, higher than 66% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux Kernel to 5.15.145 or 6.1.34 or 6.3.8, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Kernel | kernel | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 6 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 7 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 8 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 9 | Not specified in the record | Not stated |
| Fedora | Fedora | Not specified in the record | Not stated |
| Linux | Linux Kernel | 5.15 up to, but not including, 5.15.145; 5.16 up to, but not including, 6.1.34; 6.2 up to, but not including, 6.3.8; 6.4 | 5.15.145, 6.1.34, 6.3.8 |
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
- NetworkCan be exploited remotely over a network, including the internet.
- 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:N/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 (redhat.com) |
| CVSS 3.1 | 8.1 | High | NVD |
Official description
An out-of-bounds (OOB) memory read flaw was found in parse_lease_state in the KSMBD implementation of the in-kernel samba server and CIFS in the Linux kernel. When an attacker sends the CREATE command with a malformed payload to KSMBD, due to a missing check of `NameOffset` in the `parse_lease_state()` function, the `create_context` object can access invalid memory.
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
- spinics.net/lists/stable-commits/msg303065.htmlMailing List
Third-party and government advisories
- access.redhat.com/security/cve/CVE-2023-1194Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2154176Issue Tracking, Third Party Advisory
- security.netapp.com/advisory/ntap-20231221-0006/Third Party Advisory
Other vulnerabilities in kernel
- 7.5 High severity
- 7.8 High severity
- 7.1 High severity
- 8.1 High severity
- 8.1 High severity
- 7.5 High severity
Recent Out-of-bounds Read vulnerabilities
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.8 High severity
- 7.8 High severity
- 8.8 High severity
Spotted an error? Tell us.