CVE-2026-74541

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
8.8EG
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: 0.2%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

Bluetooth: ISO: clear iso_data always when detaching conn from hcon

When setting conn->hcon = NULL, also conn->hcon->iso_data = NULL is necessary, otherwise later iso_conn_free() will UAF.

Fix clearing of iso_data in iso_sock_disconn()

Fixes KASAN: slab-use-after-free in iso_conn_hold_unless_zero on iso_sock_release() followed by hci_abort_conn_sync().

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 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 SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.2%
EPSS %ILE
14th
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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-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 (model v2026.06.15, score date 2026-10-17). 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: 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 (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

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

August 15, 2026

Last Modified

October 16, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
Patch available.
Web page

Bluetooth: ISO: clear iso_data always when detaching conn from hcon - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d57e506f6a1e3929611340fae87c1e4823f4d85c
Web page

Bluetooth: ISO: clear iso_data always when detaching conn from hcon - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cc1d39946d62bc568551dfb81149724de1e91338
Web page

Bluetooth: ISO: clear iso_data always when detaching conn from hcon - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0
Web page

Bluetooth: ISO: clear iso_data always when detaching conn from hcon - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/69a4a7b162b3db6ac337e3094cdee38f24d42ff7
Web page

Bluetooth: ISO: clear iso_data always when detaching conn from hcon - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/63c0f396a18b767eb28e895eb95bbdce6c172c59

Vendor Advisories for CVE-2026-74541(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
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1035.38) @ noble2026-10-16ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (33 versions)
  • every version up to 6.12.105-1: fixed in 6.12.105-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (165 versions)
  • every version up to 7.1.8-1: fixed in 7.1.8-1
—

All Vendor Advisories

(1)

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 13× in last 7d / 101× 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 100 of 245 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. None are among the latest 100 rows. The 145 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-18 03:14 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-16 20:28 UTCEG score recompute
  6. 2026-10-16 20:27 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  7. 2026-10-16 19:27 UTCEG score recompute
  8. 2026-10-16 19:27 UTCVendor advisory
  9. 2026-10-16 19:26 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-13 07:34 UTCEG score recompute
  15. 2026-10-13 07:34 UTCVendor advisory
  16. 2026-10-13 07:34 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  18. 2026-10-12 15:39 UTCEG score recompute
  19. 2026-10-11 19:25 UTCEG score recompute
  20. 2026-10-11 16:41 UTCEG score recompute
  21. 2026-10-11 14:00 UTCEG score recompute
  22. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 30th percentile
Show 75 more
  1. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  2. 2026-10-06 21:59 UTCEG score recompute
  3. 2026-10-06 21:59 UTCVendor advisory
  4. 2026-10-06 21:59 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  5. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  6. 2026-10-06 09:08 UTCEG score recompute
  7. 2026-10-06 09:08 UTCVendor advisory
  8. 2026-10-06 09:08 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  10. 2026-10-05 12:03 UTCEG score recompute
  11. 2026-10-05 12:03 UTCVendor advisory
  12. 2026-10-05 12:03 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-04 21:55 UTCVendor advisory
  15. 2026-10-04 21:55 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  16. 2026-10-04 07:45 UTCVendor advisory
  17. 2026-10-04 07:45 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  18. 2026-10-03 19:28 UTCEG score recompute
  19. 2026-10-03 19:28 UTCVendor advisory
  20. 2026-10-03 19:28 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-10-02 15:50 UTCVendor advisory
  23. 2026-10-02 15:50 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-10-02 01:59 UTCEG score recompute
  25. 2026-10-02 01:59 UTCVendor advisory
  26. 2026-10-02 01:59 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  27. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-10-01 09:12 UTCVendor advisory
  29. 2026-10-01 09:12 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  30. 2026-09-30 20:55 UTCEG score recompute
  31. 2026-09-30 20:55 UTCVendor advisory
  32. 2026-09-30 20:55 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  33. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  34. 2026-09-28 23:36 UTCEG score recompute
  35. 2026-09-28 23:36 UTCVendor advisory
  36. 2026-09-28 23:36 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  37. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  38. 2026-09-28 10:49 UTCVendor advisory
  39. 2026-09-28 10:49 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  40. 2026-09-27 22:33 UTCEG score recompute
  41. 2026-09-27 22:33 UTCVendor advisory
  42. 2026-09-27 22:33 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  43. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  44. 2026-09-27 08:24 UTCEG score recompute
  45. 2026-09-27 08:24 UTCVendor advisory
  46. 2026-09-27 08:24 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  47. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  48. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  49. 2026-09-25 02:25 UTCEG score recompute
  50. 2026-09-25 02:25 UTCVendor advisory
  51. 2026-09-25 02:25 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  52. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  53. 2026-09-24 09:35 UTCVendor advisory
  54. 2026-09-24 09:35 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  55. 2026-09-23 21:19 UTCEG score recompute
  56. 2026-09-23 21:19 UTCVendor advisory
  57. 2026-09-23 21:19 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  58. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  59. 2026-09-23 09:03 UTCVendor advisory
  60. 2026-09-23 09:03 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  61. 2026-09-22 20:46 UTCEG score recompute
  62. 2026-09-22 20:46 UTCVendor advisory
  63. 2026-09-22 20:46 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  64. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  65. 2026-09-22 04:11 UTCEG score recompute
  66. 2026-09-22 04:11 UTCVendor advisory
  67. 2026-09-22 04:11 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  68. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  69. 2026-09-21 15:54 UTCVendor advisory
  70. 2026-09-21 15:54 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-09-21 03:29 UTCEG score recompute
  72. 2026-09-21 03:29 UTCVendor advisory
  73. 2026-09-21 03:29 UTCGHSA enrichmentGHSA-jwr7-m8vx-rqm4 · GitHub severity HIGH · GitHub CVSS 8.8
  74. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  75. 2026-09-20 14:59 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-74541?
CVE-2026-74541 is a high-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: clear iso_data always when detaching conn from hcon When setting conn->hcon = NULL, also conn->hcon->iso_data = NULL is necessary, otherwise later isoconnfree() will UAF. Fix clearing of isodata in isosock_disconn()…
When was the CVE record for CVE-2026-74541 published?
The CVE record for CVE-2026-74541 was published on August 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 October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-74541 actively exploited?
CVE-2026-74541 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74541?
CVE-2026-74541 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74541?
A fix for CVE-2026-74541 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74541 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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