CVE-2026-38753

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 2026-07-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A use-after-free in the awk_sub() function (editors/awk.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AWK script.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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 (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

July 15, 2026

Last Modified

July 20, 2026

Advisory Details (2)

Auto-updated Jul 16, 2026
Patch available.
Web page

[PATCH] awk: fix use-after-free in awk_sub()

https://lists.busybox.net/pipermail/busybox/2026-June/092352.html
Web page
http://busybox.com

Vendor Advisories for CVE-2026-38753(3)

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
redhatbusybox-main-1.37.0-8.1.hum12026-07-16redhat

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
busybox1:1.30.1-6 ... 1:1.38.0-3 (35 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
busybox1:1.35.0-4 ... 1:1.38.0-3 (28 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
busybox1:1.37.0-10 ... 1:1.38.0-3 (9 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
busybox1:1.37.0-10 ... 1:1.38.0-2 (8 versions)
  • every version up to 1:1.38.0-3: fixed in 1:1.38.0-3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 42× 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 99 of 277 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 178 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-12 16:10 UTCEG score recompute
  4. 2026-10-11 19:53 UTCEG score recompute
  5. 2026-10-11 17:06 UTCEG score recompute
  6. 2026-10-11 14:32 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-01 12:47 UTCEG score recompute
  18. 2026-10-01 12:47 UTCVendor advisory
  19. 2026-10-01 12:47 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-28 08:49 UTCEG score recompute
  23. 2026-09-28 08:49 UTCVendor advisory
  24. 2026-09-28 08:49 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
Show 74 more
  1. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-09-24 08:56 UTCEG score recompute
  4. 2026-09-24 08:56 UTCVendor advisory
  5. 2026-09-24 08:56 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-09-23 03:24 UTCEG score recompute
  7. 2026-09-23 03:24 UTCVendor advisory
  8. 2026-09-23 03:24 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  10. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  11. 2026-09-18 04:48 UTCEG score recompute
  12. 2026-09-18 04:48 UTCVendor advisory
  13. 2026-09-18 04:48 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  15. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  16. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  17. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  18. 2026-09-13 23:14 UTCEG score recompute
  19. 2026-09-13 23:14 UTCVendor advisory
  20. 2026-09-13 23:14 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  22. 2026-09-13 07:27 UTCEG score recompute
  23. 2026-09-13 07:27 UTCVendor advisory
  24. 2026-09-13 07:27 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  26. 2026-09-12 13:06 UTCVendor advisory
  27. 2026-09-12 13:06 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-09-11 21:50 UTCEG score recompute
  29. 2026-09-11 21:50 UTCVendor advisory
  30. 2026-09-11 21:50 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  32. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  33. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  34. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  35. 2026-09-08 00:59 UTCEG score recompute
  36. 2026-09-08 00:59 UTCVendor advisory
  37. 2026-09-08 00:59 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-09-06 13:30 UTCVendor advisory
  41. 2026-09-06 13:30 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-09-05 20:54 UTCEG score recompute
  43. 2026-09-05 20:54 UTCVendor advisory
  44. 2026-09-05 20:54 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  46. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  47. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  48. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  49. 2026-08-31 06:55 UTCEG score recompute
  50. 2026-08-31 06:55 UTCVendor advisory
  51. 2026-08-31 06:55 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  53. 2026-08-30 17:04 UTCVendor advisory
  54. 2026-08-30 17:04 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-08-30 03:59 UTCEG score recompute
  56. 2026-08-30 03:59 UTCVendor advisory
  57. 2026-08-30 03:59 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  58. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  59. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  60. 2026-08-27 21:28 UTCEG score recompute
  61. 2026-08-27 21:28 UTCVendor advisory
  62. 2026-08-27 21:28 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  64. 2026-08-27 05:03 UTCVendor advisory
  65. 2026-08-27 05:03 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-08-26 14:58 UTCEG score recompute
  67. 2026-08-26 14:58 UTCVendor advisory
  68. 2026-08-26 14:58 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  70. 2026-08-26 01:41 UTCEG score recompute
  71. 2026-08-26 01:41 UTCVendor advisory
  72. 2026-08-26 01:41 UTCGHSA enrichmentGHSA-9r55-p3jw-v652 · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  74. 2026-08-25 12:36 UTCVendor advisory

Related CVEs(same product + same vendor + same CWE)

Same vendor

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redhat:RHSA-2026:41130

Frequently asked(5)

What is CVE-2026-38753?
CVE-2026-38753 is a high-severity vulnerability; its CVE record was published on July 15, 2026. A use-after-free in the awk_sub() function (editors/awk.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AWK script.
When was the CVE record for CVE-2026-38753 published?
The CVE record for CVE-2026-38753 was published on July 15, 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 July 20, 2026; the record at its source may have been updated since.
Is CVE-2026-38753 actively exploited?
CVE-2026-38753 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-38753?
CVE-2026-38753 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38753?
A fix for CVE-2026-38753 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-38753 are linked in the Vendor Advisories panel on this page.

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