CVE-2023-6915

MEDIUMNVD 5.56.5
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 6.5 from GitHub Security Advisory published 2024-01-15. NVD baseline CVSS 5.5; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 5 sources updated this week
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

CVSS v3
5.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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
0.3%
EPSS %ILE
16th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

January 15, 2024

Last Modified

October 23, 2026

Advisory Details (6)

Auto-updated Oct 23, 2026
Patch available. Sources: redhat, github_commit.
Red HatMentions a patch (unverified)

CVE-2023-6915 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2023-6915
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2024:3138
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2024:2950
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2024:2394
GitHub commit

commit af73483f4e8b (torvalds/linux)

Fix landed in torvalds/linux commit af73483f4e8b — awaiting tagged release

https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a
Red HatMentions a patch (unverified)

2254982 – (CVE-2023-6915) CVE-2023-6915 kernel: Null Pointer Dereference vulnerability in ida_free in lib/idr.c

Affected: Red Hat Enterprise Linux 9

https://bugzilla.redhat.com/show_bug.cgi?id=2254982

Patch Availability(15)

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 rangeFix by version rangeDependents
linux-5.105.10.136-1~deb10u1 ... 5.10.205-2~deb10u1 (12 versions)
  • every version up to 5.10.209-2~deb10u1: fixed in 5.10.209-2~deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (37 versions)
  • every version up to 5.10.209-1: fixed in 5.10.209-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1 ... 6.1.76-1~bpo11+1 (17 versions)
  • every version up to 6.1.76-1: fixed in 6.1.76-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.6.13-1: fixed in 6.6.13-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.6.13-1: fixed in 6.6.13-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

Data Freshness Timeline

(refreshed 11× in last 7d / 35× 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 91 of 190 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. 9 repeat rows among the latest 100 are merged into the row they repeat. The 99 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-23 14:28 UTCEG score recompute
  3. 2026-10-23 14:28 UTCVendor advisory
  4. 2026-10-23 14:27 UTCGHSA enrichmentGHSA-3cfm-49vw-5qrv · GitHub CVSS 6.5
  5. 2026-10-23 14:25 UTCNVD updateCVSS v3 → 5.5
  6. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  7. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-10-18 07:38 UTCEG score recompute
  11. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-10-12 18:10 UTCEG score recompute
  17. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-10-12 05:54 UTCOSV refresh
  19. 2026-10-11 21:35 UTCEG score recompute
  20. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  22. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.3% · 15th percentile
Show 66 more
  1. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  2. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  3. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  4. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  5. 2026-09-30 16:39 UTCEG score recompute
  6. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  7. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  8. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  9. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  10. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  11. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-09-22 10:46 UTCOSV refresh
  13. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  15. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  16. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  22. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  26. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  27. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  28. 2026-09-03 07:59 UTCOSV refresh
  29. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  30. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-09-01 04:36 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  32. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  33. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  34. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  36. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  37. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  38. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  39. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  41. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  42. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  43. 2026-08-16 21:26 UTCOSV refresh
  44. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  45. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  46. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  47. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  48. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  49. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  50. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  51. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  52. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  53. 2026-08-07 16:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  54. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  55. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  56. 2026-08-04 10:36 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  57. 2026-08-03 10:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  58. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  59. 2026-08-01 15:06 UTCOSV refresh
  60. 2026-08-01 04:14 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  61. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  62. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  63. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  64. 2026-07-26 14:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  65. 2026-07-25 14:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  66. 2026-07-24 14:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile

Frequently asked(5)

What is CVE-2023-6915?
CVE-2023-6915 is a medium-severity vulnerability; its CVE record was published on January 15, 2024. A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.
When was CVE-2023-6915 made public?
CVE-2023-6915 was made public on January 15, 2024: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on January 15, 2024. EchelonGraph's copy of the record carries a last-modified date of October 23, 2026; the record at its source may have been updated since.
Is CVE-2023-6915 actively exploited?
CVE-2023-6915 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-6915?
CVE-2023-6915 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5 (MEDIUM).
How do I remediate CVE-2023-6915?
A fix for CVE-2023-6915 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-6915 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-6915

Explore →

Is Your Infrastructure Affected by CVE-2023-6915?

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