CVE-2023-53817

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-12-09. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2023-60089 (ENISA EUVD) · GHSA-3w8q-vg6g-cg46 (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()

During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie Hellamn value. mpi_cmp_ui() was detecting this if the second parameter was 0, but 1 is passed from dh_is_pubkey_valid(). This causes the null pointer u->d to be dereferenced towards the end of mpi_cmp_ui()

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-03). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 9, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 5, 2026
Patch available.
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9e47a758b70167c9301d2b44d2569f86c7796f2d
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/12ac013ad7ff0df066451e825801d805095b3776
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3ad023a39f1127dcfd331c562673355dc078650
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67589d247909043e94d2dd5fb590958e0f99d58d
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0fc7147c694394f8a8cbc19570c6bc918cac0906
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61f5453e9706e99713825594e0c8f9031485fb5f
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae63e84ffda74267bf7277c38415ba38389229a0
Web page

crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fde791e8a96a64ea7b0ad2440e43586447a209c6

Vendor Advisories for CVE-2023-53817(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
linuxKernel @ 4.14.326 (fixes >=3.7.0)—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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (34 versions)
  • every version up to 5.10.197-1: fixed in 5.10.197-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1 ... 6.1.55-1~bpo11+1 (10 versions)
  • every version up to 6.1.55-1: fixed in 6.1.55-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.5.6-1: fixed in 6.5.6-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.5.6-1: fixed in 6.5.6-1
—

Data Freshness Timeline

(refreshed 9× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 94 of 238 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 144 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-06 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-11-05 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-11-04 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-11-03 20:56 UTCEG score recompute
  5. 2026-11-03 20:56 UTCGHSA enrichmentGHSA-3w8q-vg6g-cg46 · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-11-03 16:41 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-27 23:43 UTCEG score recompute
  14. 2026-10-27 23:43 UTCGHSA enrichmentGHSA-3w8q-vg6g-cg46 · GitHub severity HIGH · GitHub CVSS 7.5
  15. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-10-25 17:27 UTCEG score recompute
  18. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-20 21:14 UTCEG score recompute
  24. 2026-10-20 21:14 UTCGHSA enrichmentGHSA-3w8q-vg6g-cg46 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
Show 69 more
  1. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-10-18 07:40 UTCEG score recompute
  4. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  9. 2026-10-12 18:12 UTCEG score recompute
  10. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-11 21:37 UTCEG score recompute
  12. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  17. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-10-01 04:40 UTCOSV refresh
  23. 2026-09-30 16:38 UTCEG score recompute
  24. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  26. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  27. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  28. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  29. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  30. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  31. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  32. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  33. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  34. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  35. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  36. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  37. 2026-09-12 06:40 UTCOSV refresh
  38. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  39. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  40. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  41. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  43. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  44. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  45. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  46. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  47. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  48. 2026-09-01 04:36 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  49. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  50. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  51. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  52. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  53. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  54. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  55. 2026-08-24 12:00 UTCOSV refresh
  56. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  57. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  58. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  59. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  60. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  61. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  62. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  63. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  64. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  65. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  66. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  67. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  68. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  69. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile

Frequently asked(5)

What is CVE-2023-53817?
CVE-2023-53817 is a high-severity vulnerability; its CVE record was published on December 9, 2025. In the Linux kernel, the following vulnerability has been resolved: crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie…
When was the CVE record for CVE-2023-53817 published?
The CVE record for CVE-2023-53817 was published on December 9, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 5, 2026; the record at its source may have been updated since.
Is CVE-2023-53817 actively exploited?
CVE-2023-53817 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-53817?
CVE-2023-53817 has a CVSS base score of 7.5 (the CNA's own assessment, by linux; NVD's own analysis pending).
How do I remediate CVE-2023-53817?
A fix for CVE-2023-53817 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-53817 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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