CVE-2023-44466Linux Kernel Memory Corruption
There is an integer signedness error, leading to a buffer overflow and remote code execution via HELLO or one of the AUTH frames.
Published Sep 29, 2023 · Updated Sep 9, 2026 · Also known as DEBIAN-CVE-2023-44466, UBUNTU-CVE-2023-44466
Key Facts
Patch in the next maintenance window- CVE-2023-44466 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Linux Kernel, linux (debian), rootio-linux and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 46% probability of exploitation in the next 30 days.
- Fixed versions are available, including bpftool 6.1.41-63.109.amzn2023, bpftool 6.1.53-1.ph5, bpftool NA.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Scores
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
46%
Higher than 98.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
45/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2023-44466
- advisoryhttps://ubuntu.com/security/CVE-2023-44466
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2023-44466
- advisoryRHSA-2023:4789
- advisoryRHSA-2023:4801
- advisoryRHSA-2023:4962
Description
An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5. There is an integer signedness error, leading to a buffer overflow and remote code execution via HELLO or one of the AUTH frames. This occurs because of an untrusted length taken from a TCP packet in ceph_decode_32.
Affected Products
148 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | See advisory | 5.15.121 |
| linuxdebian | See advisory | 6.1.52-1 |
| rootio-linuxrootio | See advisory | 6.1.52-1 |
| linux-allwinner-5.19ubuntu | See advisory | n/a |
| linux-aws-5.0ubuntu | See advisory | n/a |
Patched Releases
bpftool
6.1.41-63.109.amzn2023, 6.1.53-1.ph5, NA
kernel
0:4.18.0-372.70.1.el8_6, 0:5.14.0-284.30.1.el9_2, 5.15.135.1-2, 6.1.41-63.109.amzn2023
kernel-debuginfo-common-aarch64
6.1.41-63.109.amzn2023
kernel-debuginfo-common-x86_64
6.1.41-63.109.amzn2023
kernel-devel
6.1.41-63.109.amzn2023
kernel-headers
6.1.41-63.109.amzn2023
kernel-libbpf
6.1.41-63.109.amzn2023
kernel-libbpf-devel
6.1.41-63.109.amzn2023
kernel-libbpf-static
6.1.41-63.109.amzn2023
kernel-livepatch-6.1.41-63.109
1.0-0.amzn2023
kernel-tools
6.1.41-63.109.amzn2023
kernel-tools-devel
6.1.41-63.109.amzn2023
linux
5.15.0-86.96, 6.1.52-1, 6.1.53-1.ph5, 6.4.11-1, NA
Linux Kernel
5.15.121
linux-aws
5.15.0-1047.52
linux-aws-5.15
5.15.0-1047.52~20.04.1
linux-aws-6.2
6.2.0-1015.15~22.04.1
linux-azure
5.15.0-1049.56
linux-azure-5.15
5.15.0-1049.56~20.04.1
linux-azure-6.2
6.2.0-1016.16~22.04.1
linux-azure-fde
5.15.0-1049.56.1
linux-azure-fde-5.15
5.15.0-1049.56~20.04.1.1
linux-azure-fde-6.2
6.2.0-1016.16~22.04.1.1
linux-bluefield
5.15.0-1027.29
linux-devel
6.1.53-1.ph5, NA
Timeline
Publicly disclosed
Sep 29, 2023
Last updated
Sep 9, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
References
- advisorysecurity-tracker.debian.org · CVE-2023-44466
- advisoryubuntu.com · CVE-2023-44466
- advisorycve.org · CVERecord
- advisoryRHSA-2023:4789
- advisoryRHSA-2023:4801
FAQ
Common Questions.
An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5.
Affected: Linux Kernel; linux (debian); rootio-linux, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including bpftool 6.1.41-63.109.amzn2023, bpftool 6.1.53-1.ph5, bpftool NA.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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