CVE-2026-23137

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory (severity: MODERATE) published 2026-02-14. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-5900 (ENISA EUVD) · GHSA-rwc9-h9mh-xfwq (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

of: unittest: Fix memory leak in unittest_data_add()

In unittest_data_add(), if of_resolve_phandles() fails, the allocated unittest_data is not freed, leading to a memory leak.

Fix this by using scope-based cleanup helper __free(kfree) for automatic resource cleanup. This ensures unittest_data is automatically freed when it goes out of scope in error paths.

For the success path, use retain_and_null_ptr() to transfer ownership of the memory to the device tree and prevent double freeing.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
6th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. 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

February 14, 2026

Last Modified

October 30, 2026

Advisory Details (2)

Auto-updated Aug 9, 2026
Patch available.
Web page

of: unittest: Fix memory leak in unittest_data_add() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f09b0f705bd7197863b90256ef533a6414d1db2c
Web page

of: unittest: Fix memory leak in unittest_data_add() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b

Vendor Advisories for CVE-2026-23137(2)

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

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-realtime-hwe-24.04 (6.17.0-1018.20~24.04.1) @ noble2026-10-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1031.31) @ noble2026-10-30ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-10-30ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1019.19~24.04.3+1) @ noble2026-10-30ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-10-30ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1030.30) @ noble2026-10-30ubuntu
linuxKernel @ 6.18.6 (fixes >=3.18.0)—osv
linuxKernel @ 6.12.110 (fixes >=3.18.0)—osv
linuxKernel @ 6.6.160 (fixes >=3.18.0)—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

(5 across 4 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.3~rc7-1~exp1 (371 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (98 versions)
  • every version up to 6.18.8-1: fixed in 6.18.8-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 8× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 240 rows on record for this CVE, as 99 entries (1 repeat merged).

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. 1 repeat row among the latest 100 is merged into the row it repeats. The 140 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-11-07 19:40 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub severity MODERATE · GitHub CVSS 5.5
  8. 2026-11-07 19:40 UTCEchelonGraph re-scored
  9. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-30 13:32 UTCVendor advisory
  18. 2026-10-30 13:32 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  19. 2026-10-30 12:31 UTCEchelonGraph re-scored
  20. 2026-10-30 12:31 UTCVendor advisory
  21. 2026-10-30 12:31 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  22. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-29 07:25 UTCOSV refresh
  24. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 74 more
  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-25 14:41 UTCEchelonGraph re-scored
  4. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-21 13:53 UTCVendor advisory
  9. 2026-10-21 13:53 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  10. 2026-10-21 13:00 UTCVendor advisory
  11. 2026-10-21 12:59 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  12. 2026-10-21 12:29 UTCEchelonGraph re-scored
  13. 2026-10-21 12:29 UTCVendor advisory
  14. 2026-10-21 12:29 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  15. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-18 03:55 UTCEchelonGraph re-scored
  19. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-12 16:21 UTCEchelonGraph re-scored
  26. 2026-10-11 20:03 UTCEchelonGraph re-scored
  27. 2026-10-11 17:16 UTCEchelonGraph re-scored
  28. 2026-10-11 14:48 UTCEchelonGraph re-scored
  29. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-10-03 22:28 UTCOSV refresh
  37. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  39. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  40. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  41. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  42. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  45. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-09-14 12:36 UTCVendor advisory
  50. 2026-09-14 12:36 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  51. 2026-09-14 12:02 UTCEchelonGraph re-scored
  52. 2026-09-14 12:02 UTCVendor advisory
  53. 2026-09-14 12:01 UTCGHSA enrichmentGHSA-rwc9-h9mh-xfwq · GitHub CVSS 5.5
  54. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  55. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  58. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  59. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  61. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  62. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  63. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  65. 2026-08-31 00:23 UTCOSV refresh
  66. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  67. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  71. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  72. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  74. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile

Frequently asked(5)

What is CVE-2026-23137?
CVE-2026-23137 is a medium-severity vulnerability; its CVE record was published on February 14, 2026. In the Linux kernel, the following vulnerability has been resolved: of: unittest: Fix memory leak in unittest_data_add() In unittest_data_add(), if of_resolve_phandles() fails, the allocated unittest_data is not freed, leading to a memory leak. Fix this by using scope-based cleanup helper…
When was the CVE record for CVE-2026-23137 published?
The CVE record for CVE-2026-23137 was published on February 14, 2026. 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 October 30, 2026; the record at its source may have been updated since.
Is CVE-2026-23137 actively exploited?
CVE-2026-23137 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-23137?
CVE-2026-23137 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-23137?
A fix for CVE-2026-23137 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-23137 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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