CVE-2026-72234

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-15. A secondary CVSS source baseline 9.8; 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
9.8EG
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: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

batman-adv: access unicast_ttvn skb->data only after skb realloc

The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free.

This was done correctly for the ethernet header but missed for the unicast_packet pointer.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 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 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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
53rd
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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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; 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 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)3 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 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 (8)

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

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f
Web page

batman-adv: access unicast_ttvn skb->data only after skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9

Vendor Advisories for CVE-2026-72234(1)

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

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

All Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 28× in last 7d / 199× 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 481 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 381 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 0.7% · 53rd percentile
  2. 2026-10-19 13:49 UTCEG score recompute
  3. 2026-10-19 13:48 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  5. 2026-10-18 15:15 UTCVendor advisory
  6. 2026-10-18 15:14 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-18 03:16 UTCEG score recompute
  8. 2026-10-17 17:21 UTCEG score recompute
  9. 2026-10-17 17:21 UTCVendor advisory
  10. 2026-10-17 17:21 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  12. 2026-10-16 19:26 UTCEG score recompute
  13. 2026-10-16 19:26 UTCVendor advisory
  14. 2026-10-16 19:25 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-16 18:54 UTCEG score recompute
  16. 2026-10-16 18:54 UTCVendor advisory
  17. 2026-10-16 18:54 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  19. 2026-10-16 12:05 UTCEG score recompute
  20. 2026-10-16 12:05 UTCVendor advisory
  21. 2026-10-16 12:05 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  23. 2026-10-15 13:28 UTCEG score recompute
  24. 2026-10-15 13:28 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
Show 75 more
  1. 2026-10-14 08:30 UTCEG score recompute
  2. 2026-10-14 08:29 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  4. 2026-10-13 03:44 UTCEG score recompute
  5. 2026-10-13 03:44 UTCVendor advisory
  6. 2026-10-13 03:43 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-12 15:42 UTCEG score recompute
  9. 2026-10-12 05:50 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-11 19:27 UTCEG score recompute
  11. 2026-10-11 16:43 UTCEG score recompute
  12. 2026-10-11 14:03 UTCEG score recompute
  13. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  18. 2026-10-07 06:02 UTCVendor advisory
  19. 2026-10-07 06:02 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-07 02:22 UTCVendor advisory
  21. 2026-10-07 02:22 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-06 22:44 UTCVendor advisory
  23. 2026-10-06 22:43 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-06 17:17 UTCEG score recompute
  25. 2026-10-06 17:17 UTCVendor advisory
  26. 2026-10-06 17:17 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  28. 2026-10-06 13:15 UTCVendor advisory
  29. 2026-10-06 13:14 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  30. 2026-10-06 09:16 UTCEG score recompute
  31. 2026-10-06 09:16 UTCVendor advisory
  32. 2026-10-06 09:16 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  34. 2026-10-05 17:38 UTCVendor advisory
  35. 2026-10-05 17:38 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-05 12:38 UTCVendor advisory
  37. 2026-10-05 12:38 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-10-05 06:50 UTCVendor advisory
  39. 2026-10-05 06:50 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-05 02:27 UTCEG score recompute
  41. 2026-10-05 02:27 UTCVendor advisory
  42. 2026-10-05 02:27 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  44. 2026-10-04 22:04 UTCVendor advisory
  45. 2026-10-04 22:04 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-10-04 16:30 UTCVendor advisory
  47. 2026-10-04 16:30 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-04 12:12 UTCVendor advisory
  49. 2026-10-04 12:11 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-04 07:17 UTCVendor advisory
  51. 2026-10-04 07:17 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  52. 2026-10-04 03:40 UTCVendor advisory
  53. 2026-10-04 03:40 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-03 19:36 UTCEG score recompute
  55. 2026-10-03 19:36 UTCVendor advisory
  56. 2026-10-03 19:36 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  57. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  58. 2026-10-03 00:50 UTCVendor advisory
  59. 2026-10-03 00:50 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-02 19:33 UTCEG score recompute
  61. 2026-10-02 19:33 UTCVendor advisory
  62. 2026-10-02 19:33 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-10-02 15:54 UTCVendor advisory
  64. 2026-10-02 15:54 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-10-02 07:13 UTCEG score recompute
  66. 2026-10-02 07:13 UTCVendor advisory
  67. 2026-10-02 07:13 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  69. 2026-10-01 13:08 UTCVendor advisory
  70. 2026-10-01 13:08 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-10-01 09:31 UTCVendor advisory
  72. 2026-10-01 09:31 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-10-01 05:53 UTCVendor advisory
  74. 2026-10-01 05:52 UTCGHSA enrichmentGHSA-mcgw-cw9v-8cmp · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-10-01 01:38 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-72234?
CVE-2026-72234 is a critical-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskbmaypull() called by batadvgetvid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid…
When was the CVE record for CVE-2026-72234 published?
The CVE record for CVE-2026-72234 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-2026-72234 actively exploited?
CVE-2026-72234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72234?
CVE-2026-72234 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72234?
A fix for CVE-2026-72234 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72234 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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