7.8

CVE-2026-64189: netfilter: ipset: fix race between dump and ip_set_list resize

Modified
AliasesUBUNTU-CVE-2026-64189DEBIAN-CVE-2026-64189CGA-9h2g-33v4-wf23
Published 20-07-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-64189 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 161 · Related 157
MGASA-2026-0312OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:21555-1RHSA-2026:59723RHSA-2026:59737RHSA-2026:59821

Showing 100 of 162.

Timeline

  1. 20-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.10% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu165 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard2 products
  • linux-gcp-6.18< 6.18.44-r0
  • linux-gcp-6.18-bootc< 6.18.44-r0
Debian2 products
  • linux< 6.1.180-1 | < 6.12.96-1 | < 7.1.4-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux2 products
  • linux≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < a7a299277959683204d73333c32c092fd69327d4 | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710 | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < 96fbafc20ebd9a613736c2998b89c539fe3042f5 | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < ff86ea9b7fdf70564e60436fbee68c96bc459943 | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < 81d54c766337b923eec26da0a13406760b091093 | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < e8ee198bbc04a32d336e79160fde980e0235b39f | ≥ 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7, < 7cd9103283b26b917360ec99d7d2f2d761bcf1ab | 2f6bf7917f55f9dae913193e49672b3598620eab | ≥ 4.19.5, < 4.20 | 4.20
  • linux_kernel≥ 4.19.5, < 4.20 | ≥ 4.20.1, < 5.10.261 | ≥ 5.11, < 5.15.212 | ≥ 5.16, < 6.1.178 | ≥ 6.2, < 6.6.145 | ≥ 6.7, < 6.12.96 | ≥ 6.13, < 6.18.39 | ≥ 6.19, < 7.1.4 | 4.20 | 4.20:rc2 | 4.20:rc3 | 4.20:rc4 | 4.20:rc5 | 4.20:rc6 | 4.20:rc7 | 7.2:rc1

4 vendors · 171 products

References

35 links
Show all 35 references