CVE-2023-44466

HIGHNVD 8.88.9▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.9 because EPSS predicts 55% probability of exploitation within the next 30 days (top 1.1% of all CVEs). NVD baseline CVSS 8.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
8.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 45%CVSS: 8.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.8
EG Score
8.9(high)
EG Risk
66(Track)
EG Risk 66/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity89% × 45%
Exploitation55% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
45%
EPSS %ILE
99%
KEV
Not listed

Published

September 29, 2023

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 12, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

[PATCH] libceph: harden msgr2.1 frame segment length checks — CEPH Filesystem Development

https://www.spinics.net/lists/ceph-devel/msg57909.html
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20231116-0003/
github_commit

commit a282a2f10539 (torvalds/linux)

Fix landed in torvalds/linux commit a282a2f10539 — awaiting tagged release

https://github.com/torvalds/linux/commit/a282a2f10539dce2aa619e71e1817570d557fc97
github Patch Available🟡 PoC Available

Linux Kernel: Ceph file system driver buffer overflow · Advisory · google/security-research · GitHub

https://github.com/google/security-research/security/advisories/GHSA-jg27-jx6w-xwph
generic

libceph: harden msgr2.1 frame segment length checks - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a282a2f10539dce2aa619e71e1817570d557fc97

Vendor Advisories for CVE-2023-44466(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-intel-iotg-edge (5.15.0.1043.49~20.04.33) @ focal2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.2.0.36.36) @ lunar2026-05-24ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.2.0.1011.13) @ jammy2026-05-24ubuntu
ubuntulinux-tools-starfive (6.2.0.1009.10~22.04.2) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.86.83) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.86.96~20.04.44) @ focal2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1040.38) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1043.43) @ jammy2026-05-24ubuntu
redhatkernel-0:4.18.0-477.27.1.el8_82023-09-19redhat
redhatkernel-0:5.14.0-284.30.1.el9_22023-09-12redhat
redhatkernel-0:4.18.0-305.103.1.el8_42023-09-05redhat
redhatkernel-0:5.14.0-70.70.1.el9_02023-08-29redhat
redhatkernel-0:4.18.0-372.70.1.el8_62023-08-29redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.27-1 ... 6.1.38-4~bpo11+1 (8 versions)6.1.52-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.4.11-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.4.11-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(9)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-09-06 13:45 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-05 15:26 UTCEPSS rescore
  4. 2026-09-04 13:58 UTCEPSS rescore
  5. 2026-09-03 16:59 UTCOSV refresh
  6. 2026-09-02 14:09 UTCEPSS rescore
  7. 2026-09-01 13:51 UTCEPSS rescore
  8. 2026-08-30 19:15 UTCEPSS rescore
  9. 2026-08-30 01:20 UTCEPSS rescore
  10. 2026-08-28 21:39 UTCEPSS rescore
  11. 2026-08-26 14:44 UTCEPSS rescore
  12. 2026-08-26 14:43 UTCEPSS rescore
  13. 2026-08-25 13:46 UTCEPSS rescore
  14. 2026-08-23 00:17 UTCEPSS rescore
  15. 2026-08-21 23:47 UTCEPSS rescore
  16. 2026-08-20 22:53 UTCEPSS rescore
  17. 2026-08-19 17:02 UTCEPSS rescore
  18. 2026-08-19 17:02 UTCEPSS rescore
  19. 2026-08-18 13:46 UTCEPSS rescore
  20. 2026-08-17 13:45 UTCEPSS rescore
  21. 2026-08-17 06:27 UTCOSV refresh
  22. 2026-08-16 14:54 UTCEPSS rescore
  23. 2026-08-16 02:12 UTCEPSS rescore
  24. 2026-08-15 01:28 UTCEPSS rescore
  25. 2026-08-15 01:28 UTCEPSS rescore
Show 75 more
  1. 2026-08-13 21:58 UTCEPSS rescore
  2. 2026-08-12 13:48 UTCEPSS rescore
  3. 2026-08-11 13:39 UTCEPSS rescore
  4. 2026-08-08 16:35 UTCEPSS rescore
  5. 2026-08-07 16:25 UTCEPSS rescore
  6. 2026-08-06 13:45 UTCEPSS rescore
  7. 2026-08-04 15:07 UTCEPSS rescore
  8. 2026-08-03 10:34 UTCEPSS rescore
  9. 2026-08-03 10:34 UTCEPSS rescore
  10. 2026-08-02 01:06 UTCOSV refresh
  11. 2026-08-01 04:14 UTCEPSS rescore
  12. 2026-08-01 04:13 UTCEPSS rescore
  13. 2026-07-30 16:26 UTCEPSS rescore
  14. 2026-07-30 16:26 UTCEPSS rescore
  15. 2026-07-30 01:28 UTCEPSS rescore
  16. 2026-07-30 01:28 UTCEPSS rescore
  17. 2026-07-28 15:34 UTCEPSS rescore
  18. 2026-07-28 15:34 UTCEPSS rescore
  19. 2026-07-26 14:52 UTCEPSS rescore
  20. 2026-07-26 14:52 UTCEPSS rescore
  21. 2026-07-24 14:16 UTCEPSS rescore
  22. 2026-07-23 14:16 UTCEPSS rescore
  23. 2026-07-23 14:16 UTCEPSS rescore
  24. 2026-07-23 02:27 UTCEG score recompute▲ 0.10
  25. 2026-07-22 23:13 UTCEG score recompute
  26. 2026-07-22 14:06 UTCEPSS rescore
  27. 2026-07-20 17:06 UTCEPSS rescore
  28. 2026-07-19 14:29 UTCEPSS rescore
  29. 2026-07-19 02:27 UTCEPSS rescore
  30. 2026-07-16 17:01 UTCEPSS rescore
  31. 2026-07-16 17:01 UTCEPSS rescore
  32. 2026-07-15 16:56 UTCEPSS rescore
  33. 2026-07-15 16:56 UTCEPSS rescore
  34. 2026-07-15 08:19 UTCOSV refresh
  35. 2026-07-15 01:58 UTCEPSS rescore
  36. 2026-07-13 22:28 UTCEPSS rescore
  37. 2026-07-13 22:28 UTCEPSS rescore
  38. 2026-07-13 06:11 UTCEPSS rescore
  39. 2026-07-13 06:11 UTCEPSS rescore
  40. 2026-07-11 08:26 UTCEPSS rescore
  41. 2026-07-11 08:26 UTCEPSS rescore
  42. 2026-07-09 19:08 UTCEPSS rescore
  43. 2026-07-05 02:29 UTCEPSS rescore
  44. 2026-07-04 06:29 UTCEPSS rescore
  45. 2026-07-01 15:05 UTCEPSS rescore
  46. 2026-06-30 23:21 UTCEPSS rescore
  47. 2026-06-30 23:21 UTCEPSS rescore
  48. 2026-06-28 04:55 UTCEPSS rescore
  49. 2026-06-28 04:55 UTCEPSS rescore
  50. 2026-06-27 09:04 UTCOSV refresh
  51. 2026-06-27 03:07 UTCEPSS rescore
  52. 2026-06-27 03:07 UTCEPSS rescore
  53. 2026-06-25 13:48 UTCEPSS rescore
  54. 2026-06-25 13:48 UTCEPSS rescore
  55. 2026-06-23 21:31 UTCEPSS rescore
  56. 2026-06-23 21:31 UTCEPSS rescore
  57. 2026-06-21 01:58 UTCEPSS rescore
  58. 2026-06-21 01:58 UTCEPSS rescore
  59. 2026-06-17 17:51 UTCEPSS rescore
  60. 2026-06-17 17:51 UTCEPSS rescore
  61. 2026-06-16 17:51 UTCEPSS rescore
  62. 2026-06-16 17:51 UTCEPSS rescore
  63. 2026-06-15 17:47 UTCEPSS rescore
  64. 2026-06-15 17:47 UTCEPSS rescore
  65. 2026-06-14 23:16 UTCEPSS rescore
  66. 2026-06-13 22:59 UTCEPSS rescore
  67. 2026-06-13 22:59 UTCEPSS rescore
  68. 2026-06-12 23:10 UTCEPSS rescore
  69. 2026-06-12 23:10 UTCEPSS rescore
  70. 2026-06-11 13:59 UTCEPSS rescore
  71. 2026-06-11 13:59 UTCEPSS rescore
  72. 2026-06-10 22:17 UTCEPSS rescore
  73. 2026-06-10 13:21 UTCEPSS rescore
  74. 2026-06-10 13:21 UTCEPSS rescore
  75. 2026-06-09 19:47 UTCOSV refresh

Frequently asked(5)

What is CVE-2023-44466?
CVE-2023-44466 is a high vulnerability published on September 29, 2023. An issue was discovered in net/ceph/messengerv2.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 cephdecode_32.
When was CVE-2023-44466 disclosed?
CVE-2023-44466 was first published in the National Vulnerability Database on September 29, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-44466 actively exploited?
CVE-2023-44466 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45% probability of exploitation in the next 30 days, which ranks it in the top 1.3% of all scored CVEs.
What is the CVSS score of CVE-2023-44466?
CVE-2023-44466 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.9.
How do I remediate CVE-2023-44466?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-44466, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-44466

Explore →

Is Your Infrastructure Affected by CVE-2023-44466?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs