CVE-2023-3773

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2023-07-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 25, 2023

Last Modified

November 21, 2024

References (8)

Vendor Advisories for CVE-2023-3773(1)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-22.04c (6.1.0.1023.24) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.2.0.39.39) @ lunar2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.91.88) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gkeop-5.15 (5.15.0.1034.33) @ jammy2026-05-24ubuntu
ubuntulinux-tools-kvm (6.2.0.1018.18) @ lunar2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04 (6.2.0.39.40~22.04.16) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1046.52~20.04.36) @ focal2026-05-24ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.91.92) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1046.46) @ jammy2026-05-24ubuntu
redhatkernel-0:5.14.0-362.8.1.el9_32023-11-07redhat

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

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
linux-5.105.10.136-1~deb10u1 ... 5.10.179-5~deb10u1 (10 versions)5.10.197-1~deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (34 versions)5.10.197-1—
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—6.4.13-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.4.13-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(10)

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 / 29× 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 177 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2023-3773?
CVE-2023-3773 is a medium vulnerability published on July 25, 2023. A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAPNETADMIN privileges to cause a 4 byte out-of-bounds read of XFRMAMTIMERTHRESH when parsing netlink attributes, leading to potential leakage of sensitive heap…
When was CVE-2023-3773 disclosed?
CVE-2023-3773 was first published in the National Vulnerability Database on July 25, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3773 actively exploited?
CVE-2023-3773 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.2% of all scored CVEs.
What is the CVSS score of CVE-2023-3773?
CVE-2023-3773 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-3773?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3773, 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

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