{"id":"CVE-2024-42272","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-42272","generatedAt":"2026-10-28T04:32:45.736Z","title":"In the Linux kernel, the following vulnerability has been resolved: sched: act_ct: take care of padding in struct zones_ht_key Blamed commit increased lookup key size from 2 bytes to 16 bytes, because zones_ht_key got a struct net pointer.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched: act_ct: take care of padding in struct zones_ht_key\n\nBlamed commit increased lookup key size from 2 bytes to 16 bytes,\nbecause zones_ht_key got a struct net pointer.\n\nMake sure rhashtable_lookup() is not using the padding bytes\nwhich are not initialized.\n\n BUG: KMSAN: uninit-value in rht_ptr_rcu include/linux/rhashtable.h:376 [inline]\n BUG: KMSAN: uninit-value in __rhashtable_lookup include/linux/rhashtable.h:607 [inline]\n BUG: KMSAN: uninit-value in rhashtable_lookup include/linux/rhashtable.h:646 [inline]\n BUG: KMSAN: uninit-value in rhashtable_lookup_fast include/linux/rhashtable.h:672 [inline]\n BUG: KMSAN: uninit-value in tcf_ct_flow_table_get+0x611/0x2260 net/sched/act_ct.c:329\n  rht_ptr_rcu include/linux/rhashtable.h:376 [inline]\n  __rhashtable_lookup include/linux/rhashtable.h:607 [inline]\n  rhashtable_lookup include/linux/rhashtable.h:646 [inline]\n  rhashtable_lookup_fast include/linux/rhashtable.h:672 [inline]\n  tcf_ct_flow_table_get+0x611/0x2260 net/sched/act_ct.c:329\n  tcf_ct_init+0xa67/0x2890 net/sched/act_ct.c:1408\n  tcf_action_init_1+0x6cc/0xb30 net/sched/act_api.c:1425\n  tcf_action_init+0x458/0xf00 net/sched/act_api.c:1488\n  tcf_action_add net/sched/act_api.c:2061 [inline]\n  tc_ctl_action+0x4be/0x19d0 net/sched/act_api.c:2118\n  rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6647\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2550\n  rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6665\n  netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]\n  netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357\n  netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x30f/0x380 net/socket.c:745\n  ____sys_sendmsg+0x877/0xb60 net/socket.c:2597\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2651\n  __sys_sendmsg net/socket.c:2680 [inline]\n  __do_sys_sendmsg net/socket.c:2689 [inline]\n  __se_sys_sendmsg net/socket.c:2687 [inline]\n  __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2687\n  x64_sys_call+0x2dd6/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:47\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nLocal variable key created at:\n  tcf_ct_flow_table_get+0x4a/0x2260 net/sched/act_ct.c:324\n  tcf_ct_init+0xa67/0x2890 net/sched/act_ct.c:1408","published":"2024-08-17T09:15:08.000Z","lastModified":"2026-10-15T01:18:45.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-908"],"affected":["linux/linux kernel"],"epss":{"score":0.00241,"percentile":0.15204,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/2191a54f63225b548fd8346be3611c3219a24738","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3a5b68869dbe14f1157c6a24ac71923db060eeab","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3ddefcb8f75e312535e2e7d5fef9932019ba60f2","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7c03ab555eb1ba26c77fd7c25bdf44a0ac23edee","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d06daf0ad645d9225a3ff6958dd82e1f3988fa64","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d7cc186d0973afce0e1237c37f7512c01981fb79","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-42272","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}