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{"acknowledgement": "Red Hat would like to thank Arthur Mongodin (RandoriSec) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2022:6610", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-70.26.1.el9_0", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-09-20T00:00:00Z"}, {"advisory": "RHSA-2022:6582", "cpe": "cpe:/a:redhat:enterprise_linux:9::nfv", "package": "kernel-rt-0:5.14.0-70.26.1.rt21.98.el9_0", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-09-20T00:00:00Z"}, {"advisory": "RHSA-2022:6592", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-09-20T00:00:00Z"}, {"advisory": "RHSA-2022:6610", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-70.26.1.el9_0", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-09-20T00:00:00Z"}], "bugzilla": {"description": "kernel: heap overflow in nft_set_elem_init()", "id": "2104423", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2104423"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-1025", "details": ["An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.", "A heap buffer overflow flaw was found in the Linux kernel\u2019s Netfilter subsystem in the way a user provides incorrect input of the NFT_DATA_VERDICT type. This flaw allows a local user to crash or potentially escalate their privileges on the system."], "mitigation": {"lang": "en:us", "value": "In order to trigger the issue, it requires the ability to create user/net namespaces.\nOn non-containerized deployments of Red Hat Enterprise Linux, you can disable user namespaces by setting user.max_user_namespaces to 0:\n# echo \"user.max_user_namespaces=0\" > /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled."}, "name": "CVE-2022-34918", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2022-07-02T14:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-34918\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-34918\nhttps://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6\nhttps://lore.kernel.org/netdev/20220702115948.5de8b1e0@kernel.org/T/\nhttps://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452@randorisec.fr/T/"], "threat_severity": "Important", "upstream_fix": "Linux kernel 5.19-rc6"}