CVE-2026-72393

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

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, ghsa, secondary
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

eth: fbnic: don't cache shinfo across skb realloc

fbnic_tx_lso() calls skb_cow_head() which may reallocate the skb including the shared info. We can't use the pointer calculated before the call.

BUG: KASAN: slab-use-after-free in fbnic_tx_lso.isra.0+0x668/0x8e0 Read of size 4 at addr ff110000262edd98 by task swapper/5/0 Call Trace: fbnic_tx_lso.isra.0+0x668/0x8e0 fbnic_xmit_frame+0x622/0xba0 dev_hard_start_xmit+0xf4/0x620

Allocated by task 8653: __alloc_skb+0x11e/0x5f0 alloc_skb_with_frags+0xcc/0x6c0 sock_alloc_send_pskb+0x327/0x3f0 __ip_append_data+0x188b/0x47a0 ip_make_skb+0x24a/0x300 udp_sendmsg+0x14d2/0x21e0

Freed by task 0: kfree+0x123/0x5a0 pskb_expand_head+0x36c/0xfa0 fbnic_tx_lso.isra.0+0x500/0x8e0 fbnic_xmit_frame+0x622/0xba0 dev_hard_start_xmit+0xf4/0x620 sch_direct_xmit+0x25b/0x1100

The buggy address belongs to the object at ff110000262edc40 which belongs to the cache skbuff_small_head of size 640 The buggy address is located 344 bytes inside of freed 640-byte region [ff110000262edc40, ff110000262ede

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

eth: fbnic: don't cache shinfo across skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/83df3e2594cd78aa40b1246a19879abb4891945b
generic

eth: fbnic: don't cache shinfo across skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/62b68b774f06bf52e329f254f0199bc43d350ccf
generic

eth: fbnic: don't cache shinfo across skb realloc - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/21f304c2aae46625e050c28d979f4b9d83faa85e

Vendor Advisories for CVE-2026-72393(1)

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

Data Freshness Timeline

(refreshed 44× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 21:04 UTCGHSA enrichment
  3. 2026-08-20 16:47 UTCGHSA enrichment
  4. 2026-08-20 12:23 UTCGHSA enrichment
  5. 2026-08-20 08:07 UTCGHSA enrichment
  6. 2026-08-20 03:51 UTCGHSA enrichment
  7. 2026-08-19 23:34 UTCGHSA enrichment
  8. 2026-08-19 19:17 UTCEG score recompute
  9. 2026-08-19 19:17 UTCGHSA enrichment
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 14:56 UTCGHSA enrichment
  12. 2026-08-19 10:40 UTCGHSA enrichment
  13. 2026-08-19 06:20 UTCGHSA enrichment
  14. 2026-08-19 01:54 UTCGHSA enrichment
  15. 2026-08-18 21:37 UTCGHSA enrichment
  16. 2026-08-18 17:00 UTCEG score recompute
  17. 2026-08-18 17:00 UTCGHSA enrichment
  18. 2026-08-18 13:49 UTCEPSS rescore
  19. 2026-08-18 13:49 UTCEPSS rescore
  20. 2026-08-18 12:41 UTCGHSA enrichment
  21. 2026-08-18 08:16 UTCGHSA enrichment
  22. 2026-08-18 03:52 UTCGHSA enrichment
  23. 2026-08-17 23:35 UTCGHSA enrichment
  24. 2026-08-17 19:18 UTCGHSA enrichment
  25. 2026-08-17 15:02 UTCEG score recompute
Show 19 more
  1. 2026-08-17 15:02 UTCGHSA enrichment
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-17 10:45 UTCEG score recompute
  4. 2026-08-17 10:45 UTCGHSA enrichment
  5. 2026-08-17 06:29 UTCEG score recompute
  6. 2026-08-17 06:29 UTCGHSA enrichment
  7. 2026-08-17 05:57 UTCEG score recompute▲ 9.80
  8. 2026-08-17 05:57 UTCGHSA enrichment
  9. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  10. 2026-08-17 05:29 UTCEG score recompute
  11. 2026-08-17 05:29 UTCGHSA enrichment
  12. 2026-08-17 05:24 UTCMITRE cvelistV5
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:15 UTCEPSS rescore
  16. 2026-08-15 06:34 UTCGHSA enrichment
  17. 2026-08-15 06:23 UTCNVD update
  18. 2026-08-15 06:05 UTCEG score recompute
  19. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72393?
CVE-2026-72393 is a critical vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: eth: fbnic: don't cache shinfo across skb realloc fbnictxlso() calls skbcowhead() which may reallocate the skb including the shared info. We can't use the pointer calculated before the call. BUG: KASAN: slab-use-after-free in…
When was CVE-2026-72393 disclosed?
CVE-2026-72393 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72393 actively exploited?
CVE-2026-72393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.4% of all scored CVEs.
What is the CVSS score of CVE-2026-72393?
CVE-2026-72393 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-72393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72393, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-72393

Explore →

Is Your Infrastructure Affected by CVE-2026-72393?

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

Start Free Scan →Browse All CVEs