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No exploitation reportedFix available

CVE-2023-44466

No exploitation reported by the sources we read.

  • Published2023-09-29
  • Fixed in6.4.5 · 6.1.40 · 5.15.121
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-09-2906:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-44466?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-44466?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.x≥ 6.2, < 6.4.56.4.5
6.1≥ 5.16, < 6.1.406.1.40
5.x≥ 5.11, < 5.15.1215.15.121

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bpftoolRed Hat:enterprise_linux:9::baseosall versions · fixed in 0:7.0.0-284.30.1.el9_2and 1 other package
  • bpftool-debuginfoRed Hat:enterprise_linux:9::crball versions · fixed in 0:7.0.0-284.30.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::appstreamall versions · fixed in 0:7.0.0-284.30.1.el9_2
  • kernelTuxCare:CentOS:8.5all versions · fixed in 4.18.0-348.7.1.el8_5.tuxcare.els17and 21 other packages
  • kernelTuxCare:CentOS:8.4all versions · fixed in 4.18.0-305.25.1.el8_4.tuxcare.els17and 21 other packages
  • kernelRed Hat:rhel_tus:8.4::baseosall versions · fixed in 0:4.18.0-305.103.1.el8_4and 23 other packages
  • kernelRed Hat:rhel_eus:9.0::baseosall versions · fixed in 0:5.14.0-70.70.1.el9_0and 27 other packages
  • kernelRed Hat:rhel_eus:8.6::baseosall versions · fixed in 0:4.18.0-372.70.1.el8_6and 32 other packages

59 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-44466 Red Hat Product Security1,458 products fixed · 38 known affected

    kernel: buffer overflow in ceph file net/ceph/messenger_v2.c

    kernel-rt as a component of Red Hat Enterprise Linux 8 · kernel-rt-core as a component of Red Hat Enterprise Linux 8 · kernel-rt-debug as a component of Red Hat Enterprise Linux 8 · +35 more

  • RHSA-2023:5244 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2023:5069 Red Hat Product Security201 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2023:4962 Red Hat Product Security146 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2023:4801 Red Hat Product Security166 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2023:4789 Red Hat Product Security129 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Full record on NVD

Fix

  1. Update Linux linux kernel to 6.4.5 · 6.1.40 · 5.15.121
  2. Vendor fix Red Hat Product Security CVE-2023-44466 · 297 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  3. Vendor fix Red Hat Product Security CVE-2023-44466 · 214 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. No fix available, says the vendor Red Hat Product Security CVE-2023-44466 · 38 productsAffected

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.18.8read 2026-10-23
  • NVDweakness (CWE)CWE-120read 2026-10-23
  • FIRST EPSSEPSS score44.9 %read 2026-11-02
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-09-29
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2023-44466?

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.

Is CVE-2023-44466 actively exploited?

Active exploitation of CVE-2023-44466 has not been confirmed. Its EPSS score was 44.9% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-44466?

CVE-2023-44466 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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