kernel: Integer Underflow (Wrap or Wraparound)
CVE-2024-0565 is a high-severity integer underflow (wrap or wraparound) vulnerability in kernel from Linux, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists versions 5.10.211, 5.15.150, 6.1.69 as the first without the flaw, so updating kernel to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2% chance of exploitation within 30 days, higher than 81% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update kernel to 5.10.211 or 5.15.150 or 6.1.69 or 6.6.8, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.7 or a later version.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | kernel | 4.19 up to, but not including, 5.10.211; 5.11 up to, but not including, 5.15.150; 5.16 up to, but not including, 6.1.69; 6.2 up to, but not including, 6.6.8 | 5.10.211, 5.15.150, 6.1.69, 6.6.8 |
| Red Hat | Red Hat Enterprise Linux 8 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 9 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | Not specified in the record | Not stated |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | Not specified in the record | Not stated |
| Red Hat | RHOL-5.7-RHEL-8 | 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 |
| Linux | Linux Kernel | 6.1.36 up to, but not including, 6.7; 6.7 | 6.7 |
| NetApp | Ontap Tools | Not specified in the record | Not stated |
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
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.8 | Medium | CNA (redhat.com) |
| CVSS 3.1 | 7.4 | High | NVD |
Official description
An out-of-bounds memory read flaw was found in receive_encrypted_standard in fs/smb/client/smb2ops.c in the SMB Client sub-component in the Linux Kernel. This issue occurs due to integer underflow on the memcpy length, leading to a denial of service.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Integer Underflow (Wrap or Wraparound)
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
More Integer Underflow (Wrap or Wraparound) vulnerabilities (CWE-191)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- bugzilla.redhat.com/show_bug.cgi?id=2258518Issue Tracking, Third Party Advisory
- spinics.net/lists/stable-commits/msg328851.htmlMailing List
Third-party and government advisories
- access.redhat.com/security/cve/CVE-2024-0565Third Party Advisory
Other references
- access.redhat.com/errata/RHSA-2024:1188
- access.redhat.com/errata/RHSA-2024:1404
- access.redhat.com/errata/RHSA-2024:1532
- access.redhat.com/errata/RHSA-2024:1533
- access.redhat.com/errata/RHSA-2024:1607
- access.redhat.com/errata/RHSA-2024:1614
- access.redhat.com/errata/RHSA-2024:2093
- access.redhat.com/errata/RHSA-2024:2394
- lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- security.netapp.com/advisory/ntap-20240223-0002/
Other vulnerabilities in kernel
- 7.1 High severity
- 7.8 High severity
Linux Kernel Use-After-Free Exploited
- 7.8 High severity
- 7.1 High severity
- 7.0 High severity
- 7.8 High severity
Recent Integer Underflow (Wrap or Wraparound) vulnerabilities
- 7.3 High severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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