{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64189", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.040Z", "datePublished": "2026-07-20T16:27:47.767Z", "dateUpdated": "2026-07-20T16:27:47.767Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T16:27:47.767Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set->ref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n Call Trace:\n ...\n kasan_report (mm/kasan/report.c:595)\n ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n netlink_dump (net/netlink/af_netlink.c:2325)\n netlink_recvmsg (net/netlink/af_netlink.c:1976)\n sock_recvmsg (net/socket.c:1159)\n __sys_recvfrom (net/socket.c:2315)\n ...\n Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n Kernel panic - not syncing: Fatal exception"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipset/ip_set_core.c"], "versions": [{"version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7", "lessThan": "ff86ea9b7fdf70564e60436fbee68c96bc459943", "status": "affected", "versionType": "git"}, {"version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7", "lessThan": "81d54c766337b923eec26da0a13406760b091093", "status": "affected", "versionType": "git"}, {"version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7", "lessThan": "e8ee198bbc04a32d336e79160fde980e0235b39f", "status": "affected", "versionType": "git"}, {"version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7", "lessThan": "7cd9103283b26b917360ec99d7d2f2d761bcf1ab", "status": "affected", "versionType": "git"}, {"version": "2f6bf7917f55f9dae913193e49672b3598620eab", "status": "affected", "versionType": "git"}, {"version": "4.19.5", "lessThan": "4.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipset/ip_set_core.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.2-rc2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943"}, {"url": "https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093"}, {"url": "https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f"}, {"url": "https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab"}], "title": "netfilter: ipset: fix race between dump and ip_set_list resize", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: netfilter: ipset: fix race between dump and ip_set_list resize", "id": "2502889", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502889"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's netfilter ipset component. A race condition exists between the `ip_set_list` resize operation and dump operations. This can lead to a use-after-free vulnerability, where memory is accessed after it has been deallocated. A successful exploitation of this flaw could result in a kernel panic, effectively causing a Denial of Service (DoS) on the system."], "name": "CVE-2026-64189", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64189\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64189\nhttps://lore.kernel.org/linux-cve-announce/2026072051-CVE-2026-64189-b911@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7,ff86ea9b7fdf70564e60436fbee68c96bc459943)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7,81d54c766337b923eec26da0a13406760b091093)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7,e8ee198bbc04a32d336e79160fde980e0235b39f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7,7cd9103283b26b917360ec99d7d2f2d761bcf1ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "2f6bf7917f55f9dae913193e49672b3598620eab"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.5,4.20)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.20"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.20)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-20T23:45:04.951572+00:00", "updated": "2026-07-20T23:45:04.951601+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}