CVE-2024-42272sched: act_ct: take care of padding in struct zones_ht_key
- 7.8HighCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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. Make sure rhashtable_lookup() is not using the padding bytes which are not initialized. BUG: KMSAN: uninit-value in rht_ptr_rcu include/linux/rhashtable.h:376 [inline] BUG: KMSAN: uninit-value in __rhashtable_lookup include/linux/rhashtable.h:607 [inline] BUG: KMSAN: uninit-value in rhashtable_lookup include/linux/rhashtable.h:646 [inline] BUG: KMSAN: uninit-value in rhashtable_lookup_fast include/linux/rhashtable.h:672 [inline] BUG: KMSAN: uninit-value in tcf_ct_flow_table_get+0x611/0x2260 net/sched/act_ct.c:329 rht_ptr_rcu include/linux/rhashtable.h:376 [inline] __rhashtable_lookup include/linux/rhashtable.h:607 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] rhashtable_lookup_fast include/linux/rhashtable.h:672 [inline] tcf_ct_flow_table_get+0x611/0x2260 net/sched/act_ct.c:329 tcf_ct_init+0xa67/0x2890 net/sched/act_ct.c:1408 tcf_action_init_1+0x6cc/0xb30 net/sched/act_api.c:1425 tcf_action_init+0x458/0xf00 net/sched/act_api.c:1488 tcf_action_add net/sched/act_api.c:2061 [inline] tc_ctl_action+0x4be/0x19d0 net/sched/act_api.c:2118 rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6665 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 ____sys_sendmsg+0x877/0xb60 net/socket.c:2597 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2651 __sys_sendmsg net/socket.c:2680 [inline] __do_sys_sendmsg net/socket.c:2689 [inline] __se_sys_sendmsg net/socket.c:2687 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2687 x64_sys_call+0x2dd6/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable key created at: tcf_ct_flow_table_get+0x4a/0x2260 net/sched/act_ct.c:324 tcf_ct_init+0xa67/0x2890 net/sched/act_ct.c:1408
Timeline
ID reserved
By Linux
- 18 days later
· 18 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 03f625505e27f709390a86c9b78d3707f4c23df8 – < 7c03ab555eb1ba26c77fd7c25bdf44a0ac23edee
- affected aa1f81fe3a059bc984b230b5352ab89d06aa3c7b – < 3ddefcb8f75e312535e2e7d5fef9932019ba60f2
- affected 2f82f75f843445daa81e8b2a76774b1348033ce6 – < d06daf0ad645d9225a3ff6958dd82e1f3988fa64
- affected 9126fd82e9edc7b4796f756e4b258d34f17e5e4a – < d7cc186d0973afce0e1237c37f7512c01981fb79
- affected 88c67aeb14070bab61d3dd8be96c8b42ebcaf53a – < 3a5b68869dbe14f1157c6a24ac71923db060eeab
- affected 88c67aeb14070bab61d3dd8be96c8b42ebcaf53a – < 2191a54f63225b548fd8346be3611c3219a24738
- affected b4382b854975ae96fbfcc83a1d79b5c063c1aaa8
- affected 5.10.221 – < 5.10.224
- affected 5.15.162 – < 5.15.165
- affected 6.1.96 – < 6.1.104
- affected 6.6.36 – < 6.6.45
- affected 6.9.7 – < 6.10
- affected 6.10
- unaffected < 6.10
- unaffected 5.10.224 – ≤ 5.10.*
- unaffected 5.15.165 – ≤ 5.15.*
- unaffected 6.1.104 – ≤ 6.1.*
- unaffected 6.6.45 – ≤ 6.6.*
- unaffected 6.10.4 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References9
- https://git.kernel.org/stable/c/7c03ab555eb1ba26c77fd7c25bdf44a0ac23edee (opens in a new tab)
- https://git.kernel.org/stable/c/3ddefcb8f75e312535e2e7d5fef9932019ba60f2 (opens in a new tab)
- https://git.kernel.org/stable/c/d06daf0ad645d9225a3ff6958dd82e1f3988fa64 (opens in a new tab)
- https://git.kernel.org/stable/c/d7cc186d0973afce0e1237c37f7512c01981fb79 (opens in a new tab)
- https://git.kernel.org/stable/c/3a5b68869dbe14f1157c6a24ac71923db060eeab (opens in a new tab)
- https://git.kernel.org/stable/c/2191a54f63225b548fd8346be3611c3219a24738 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-39495 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-42272)Record last updated .