CVE-2026-64572

UNRATEDCVSS · not yet scoredTrending — 5 sources updated this week
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: 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:

ipv4: fib: free fib_alias with kfree_rcu() on insert error path

fib_table_insert() publishes new_fa into the leaf's fa_list with fib_insert_alias() before calling the fib entry notifiers. When a notifier fails, the error path removes new_fa with fib_remove_alias() (hlist_del_rcu) and frees it right away with kmem_cache_free().

fib_table_lookup() walks that list under rcu_read_lock() only, so a concurrent lookup that already reached new_fa keeps reading it after the free:

BUG: KASAN: slab-use-after-free in fib_table_lookup (net/ipv4/fib_trie.c:1601) Read of size 1 at addr ffff88810676d4eb by task exploit/297 Call Trace: fib_table_lookup (net/ipv4/fib_trie.c:1601) ip_route_output_key_hash_rcu (net/ipv4/route.c:2814) ip_route_output_key_hash (net/ipv4/route.c:2705) __ip4_datagram_connect (net/ipv4/datagram.c:49) udp_connect (net/ipv4/udp.c:2144) __sys_connect (net/socket.c:2167) __x64_sys_connect (net/socket.c:2173) do_syscall_64 entry_SYSCALL_64_after_hwframe which belongs to the cache ip_fib_alias of size 56

Triggering the error path needs CAP_NET_ADMIN and a registered fib notifier that can reject a route; a netdevsim device whose IPv4 FIB resource is exhausted is enough.

Free new_fa with alias_free_mem_rcu(), as fib_table_delete() already does for a fib_alias removed from the trie.

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 19, 2026

References (8)

Vendor Advisories for CVE-2026-64572(2)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (500 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc5-1~exp1 (338 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)6.12.101-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.6-1—

Data Freshness Timeline

(refreshed 20× in last 7d / 35× 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 22:55 UTCEPSS rescore
  2. 2026-08-19 17:27 UTCVendor advisory
  3. 2026-08-19 17:27 UTCGHSA enrichment
  4. 2026-08-19 17:21 UTCNVD update
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 16:56 UTCVendor advisory
  7. 2026-08-19 16:56 UTCGHSA enrichment
  8. 2026-08-19 16:43 UTCMITRE cvelistV5
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 05:42 UTCVendor advisory
  12. 2026-08-17 05:42 UTCGHSA enrichment
  13. 2026-08-17 05:25 UTCNVD update
  14. 2026-08-17 05:13 UTCVendor advisory
  15. 2026-08-17 05:13 UTCGHSA enrichment
  16. 2026-08-17 05:05 UTCMITRE cvelistV5
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 16:00 UTCVendor advisory
  20. 2026-08-14 16:00 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-11 13:27 UTCVendor advisory
  24. 2026-08-11 13:27 UTCGHSA enrichment
  25. 2026-08-11 00:00 UTCEPSS rescore
Show 10 more
  1. 2026-08-09 13:47 UTCEPSS rescore
  2. 2026-08-08 16:37 UTCEPSS rescore
  3. 2026-08-08 10:54 UTCEG score recompute
  4. 2026-08-08 10:54 UTCGHSA enrichment
  5. 2026-08-06 13:47 UTCEPSS rescore
  6. 2026-08-05 19:17 UTCEPSS rescore
  7. 2026-08-05 19:17 UTCEPSS rescore
  8. 2026-08-05 08:20 UTCNVD update
  9. 2026-08-05 08:12 UTCEG score recompute
  10. 2026-08-05 08:10 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-64572?
CVE-2026-64572 is a publicly disclosed vulnerability published on August 5, 2026. In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: free fibalias with kfreercu() on insert error path fibtableinsert() publishes newfa into the leaf's falist with fibinsertalias() before calling the fib entry notifiers. When a notifier fails, the error path removes newfa…
When was CVE-2026-64572 disclosed?
CVE-2026-64572 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64572 actively exploited?
CVE-2026-64572 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.3% of all scored CVEs.
How do I remediate CVE-2026-64572?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64572, 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.

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