CVE-2023-52927

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: allow exp not to be removed in nf_ct_find_expectation

Currently nf_conntrack_in() calling nf_ct_find_expectation() will remove the exp from the hash table. However, in some scenario, we expect the exp not to be removed when the created ct will not be confirmed, like in OVS and TC conntrack in the following patches.

This patch allows exp not to be removed by setting IPS_CONFIRMED in the status of the tmpl.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

March 14, 2025

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated May 12, 2026
⚠️ Active exploitation confirmed. Patch available.
generic🔴 Active Exploitation

SSA-082556

https://cert-portal.siemens.com/productcert/html/ssa-082556.html
generic Patch Available

[SECURITY] [DLA 4193-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
generic🟡 PoC Available

CVE-2023-52927 - Turning a Forgotten Syzkaller Report into kCTF Exploit | SeaDragnoL

https://seadragnol.github.io/posts/CVE-2023-52927/
generic

netfilter: allow exp not to be removed in nf_ct_find_expectation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4914109a8e1e494c6aa9852f9e84ec77a5fc643f
generic

netfilter: allow exp not to be removed in nf_ct_find_expectation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3fa58a6fbd1e9e5682d09cdafb08fba004cb12ec

Vendor Advisories for CVE-2023-52927(2)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.139.149~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.215.208) @ focal2026-05-21ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1148.90) @ focal2026-05-21ubuntu
ubuntulinux-tools-realtime (5.15.0.1083.87) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-fips (5.15.0.1088.73) @ jammy2026-05-21ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-05-21ubuntu
ubuntulinux-tools-azure (4.15.0.1188.203~14.04.1) @ trusty2026-05-21ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1150.144) @ focal2026-05-21ubuntu
ubuntulinux-tools-gcp-fips (4.15.0.2081.79) @ bionic2026-05-21ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.237.249~16.04.1) @ xenial2026-05-21ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-05-21ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1088.86) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1083.92~20.04.1) @ focal2026-05-21ubuntu
ubuntulinux-tools-gcp-fips (5.15.0.1082.72) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-edge (4.15.0.1188.203~16.04.1) @ xenial2026-05-21ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1092.97~18.04.1) @ bionic2026-05-21ubuntu
ubuntulinux-tools-azure-fips (4.15.0.2097.93) @ bionic2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1050.54) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-fips (5.4.0.1151.88) @ focal2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1064 (5.4.0-1064.68) @ focal2026-05-21ubuntu
ubuntulinux-tools-bluefield (5.4.0.1105.101) @ focal2026-05-21ubuntu
ubuntulinux-tools-iot (5.4.0.1051.49) @ focal2026-05-21ubuntu
linuxKernel @ 6.1.130—osv

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.

Weakness Classification(1)

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

All Vendor Advisories

(22)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 16× in last 7d / 52× 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 146 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
  4. 2026-08-05 19:15 UTCEPSS rescore
  5. 2026-08-05 10:21 UTCEG score recompute
  6. 2026-08-05 10:21 UTCGHSA enrichment
  7. 2026-08-04 11:06 UTCEG score recompute
  8. 2026-08-04 11:06 UTCVendor advisory
  9. 2026-08-04 11:06 UTCGHSA enrichment
  10. 2026-08-04 10:36 UTCEPSS rescore
  11. 2026-08-04 09:45 UTCEG score recompute
  12. 2026-08-04 09:45 UTCVendor advisory
  13. 2026-08-04 09:45 UTCGHSA enrichment
  14. 2026-08-03 10:34 UTCEPSS rescore
  15. 2026-08-02 02:25 UTCEPSS rescore
  16. 2026-08-02 02:25 UTCEPSS rescore
  17. 2026-08-01 04:14 UTCEPSS rescore
  18. 2026-07-30 16:26 UTCEPSS rescore
  19. 2026-07-30 01:29 UTCEPSS rescore
  20. 2026-07-28 15:34 UTCEPSS rescore
  21. 2026-07-28 15:34 UTCEPSS rescore
  22. 2026-07-28 00:24 UTCOSV refresh
  23. 2026-07-26 14:53 UTCEPSS rescore
  24. 2026-07-25 14:16 UTCEPSS rescore
  25. 2026-07-24 14:16 UTCEPSS rescore
Show 75 more
  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:29 UTCEG score recompute
  3. 2026-07-22 23:16 UTCEG score recompute▲ 2.30
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-21 15:23 UTCEPSS rescore
  7. 2026-07-20 17:06 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
  9. 2026-07-19 14:29 UTCEPSS rescore
  10. 2026-07-19 02:27 UTCEPSS rescore
  11. 2026-07-19 02:27 UTCEPSS rescore
  12. 2026-07-18 10:03 UTCEPSS rescore
  13. 2026-07-18 10:03 UTCEPSS rescore
  14. 2026-07-16 17:01 UTCEPSS rescore
  15. 2026-07-15 16:56 UTCEPSS rescore
  16. 2026-07-15 01:59 UTCEPSS rescore
  17. 2026-07-15 01:59 UTCEPSS rescore
  18. 2026-07-14 13:19 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  19. 2026-07-14 12:40 UTCMITRE cvelistV5
  20. 2026-07-13 22:28 UTCEPSS rescore
  21. 2026-07-13 22:28 UTCEPSS rescore
  22. 2026-07-13 06:11 UTCEPSS rescore
  23. 2026-07-12 05:45 UTCEPSS rescore
  24. 2026-07-12 05:45 UTCEPSS rescore
  25. 2026-07-11 08:26 UTCEPSS rescore
  26. 2026-07-10 16:52 UTCOSV refresh
  27. 2026-07-09 19:08 UTCEPSS rescore
  28. 2026-07-08 15:13 UTCEPSS rescore
  29. 2026-07-07 13:45 UTCEPSS rescore
  30. 2026-07-07 13:44 UTCEPSS rescore
  31. 2026-07-06 16:26 UTCEPSS rescore
  32. 2026-07-06 16:26 UTCEPSS rescore
  33. 2026-07-06 02:22 UTCEPSS rescore
  34. 2026-07-06 02:22 UTCEPSS rescore
  35. 2026-07-05 02:29 UTCEPSS rescore
  36. 2026-07-04 06:29 UTCEPSS rescore
  37. 2026-07-01 15:05 UTCEPSS rescore
  38. 2026-06-30 23:21 UTCEPSS rescore
  39. 2026-06-30 23:21 UTCEPSS rescore
  40. 2026-06-28 14:06 UTCEPSS rescore
  41. 2026-06-28 14:06 UTCEPSS rescore
  42. 2026-06-28 04:55 UTCEPSS rescore
  43. 2026-06-27 03:07 UTCEPSS rescore
  44. 2026-06-25 13:48 UTCEPSS rescore
  45. 2026-06-25 13:48 UTCEPSS rescore
  46. 2026-06-24 14:04 UTCEPSS rescore
  47. 2026-06-24 14:04 UTCEPSS rescore
  48. 2026-06-23 21:31 UTCEPSS rescore
  49. 2026-06-23 21:31 UTCEPSS rescore
  50. 2026-06-22 14:24 UTCEPSS rescore
  51. 2026-06-22 14:24 UTCEPSS rescore
  52. 2026-06-22 00:25 UTCOSV refresh
  53. 2026-06-21 14:55 UTCEPSS rescore
  54. 2026-06-21 14:55 UTCEPSS rescore
  55. 2026-06-21 01:58 UTCEPSS rescore
  56. 2026-06-21 01:58 UTCEPSS rescore
  57. 2026-06-19 19:24 UTCEPSS rescore
  58. 2026-06-19 19:24 UTCEPSS rescore
  59. 2026-06-18 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. 2026-06-14 23:16 UTCEPSS rescore
  65. 2026-06-13 22:59 UTCEPSS rescore
  66. 2026-06-13 22:59 UTCEPSS rescore
  67. 2026-06-12 23:11 UTCEPSS rescore
  68. 2026-06-11 13:59 UTCEPSS rescore
  69. 2026-06-10 22:17 UTCEPSS rescore
  70. 2026-06-10 13:21 UTCEPSS rescore
  71. 2026-06-08 14:16 UTCEPSS rescore
  72. 2026-06-08 14:16 UTCEPSS rescore
  73. 2026-06-07 15:24 UTCEPSS rescore
  74. 2026-06-07 15:24 UTCEPSS rescore
  75. 2026-06-06 13:46 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Frequently asked(5)

What is CVE-2023-52927?
CVE-2023-52927 is a high vulnerability published on March 14, 2025. In the Linux kernel, the following vulnerability has been resolved: netfilter: allow exp not to be removed in nfctfind_expectation Currently nfconntrackin() calling nfctfind_expectation() will remove the exp from the hash table. However, in some scenario, we expect the exp not to be removed when…
When was CVE-2023-52927 disclosed?
CVE-2023-52927 was first published in the National Vulnerability Database on March 14, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-52927 actively exploited?
CVE-2023-52927 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 77.4% of all scored CVEs.
What is the CVSS score of CVE-2023-52927?
CVE-2023-52927 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-52927?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-52927, 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

Explore the affected products and dependency analysis for CVE-2023-52927

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