CVE-2026-64189

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-20. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: ipset: fix race between dump and ip_set_list resize

The release path of ip_set_dump_do() and ip_set_dump_done() read inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw() of the array pointer. These run from netlink_recvmsg() without the nfnl mutex and without an RCU read-side critical section.

A concurrent ip_set_create() can grow the array: it publishes the new array, calls synchronize_net() and then kvfree()s the old one. Since the dump paths read the array outside any RCU reader, synchronize_net() does not wait for them and the old array can be freed while they still index into it, causing a use-after-free.

The dumped set itself stays pinned via set->ref_netlink, so only the array load needs protecting. Take rcu_read_lock() around it, matching ip_set_get_byname() and __ip_set_put_byindex().

BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) Read of size 8 at addr ffff88800b5c4018 by task exploit/150 Call Trace: ... kasan_report (mm/kasan/report.c:595) ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) netlink_dump (net/netlink/af_netlink.c:2325) netlink_recvmsg (net/netlink/af_netlink.c:1976) sock_recvmsg (net/socket.c:1159) __sys_recvfrom (net/socket.c:2315) ... Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7] RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698) Kernel panic - not syncing: Fatal exception

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

July 20, 2026

Last Modified

August 17, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a7a299277959683204d73333c32c092fd69327d4
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96fbafc20ebd9a613736c2998b89c539fe3042f5
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab
generic

netfilter: ipset: fix race between dump and ip_set_list resize - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1bc67c3fc98e9fc07032cc56afcdbc690c47d11e

Vendor Advisories for CVE-2026-64189(6)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
redhatkernel-0:6.12.0-211.50.1.el10_22026-09-01redhat
redhatkernel-0:4.18.0-553.158.1.el8_102026-08-26redhat
redhatkernel-rt-0:4.18.0-553.158.1.rt7.499.el8_102026-08-26redhat
redhatkernel-0:5.14.0-687.42.1.el9_82026-08-26redhat

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

(6 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)5.10.262-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.177-1~deb11u1 (22 versions)6.1.180-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)6.1.180-1—
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.4-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 22× in last 7d / 102× 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.

Showing the most recent 100 of 390 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64189?
CVE-2026-64189 is a high vulnerability published on July 20, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix race between dump and ipsetlist resize The release path of ipsetdumpdo() and ipsetdumpdone() read inst->ipsetlist via ipsetrefnetlink(), a plain rcudereference_raw() of the array pointer. These run from…
When was CVE-2026-64189 disclosed?
CVE-2026-64189 was first published in the National Vulnerability Database on July 20, 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-2026-64189 actively exploited?
CVE-2026-64189 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 99.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64189?
CVE-2026-64189 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64189?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64189, 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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