7.8

CVE-2024-42272: sched: act_ct: take care of padding in struct zones_ht_key

Modified
AliasesUBUNTU-CVE-2024-42272DEBIAN-CVE-2024-42272
Published 17-08-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-42272 is a high (CVSS 7.8) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.3% 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
0.24%
0%100%
Low · 0.00 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 17 · Related 10
DLA-3912-1DLA-4008-1MGASA-2024-0309MGASA-2024-0310RHSA-2024:8157RHSA-2024:8158

Timeline

  1. 17-08-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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.

Ubuntu116 products
  • linux< 5.15.0-125.135 | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1072.78 | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 03f625505e27f709390a86c9b78d3707f4c23df8, < 7c03ab555eb1ba26c77fd7c25bdf44a0ac23edee | ≥ aa1f81fe3a059bc984b230b5352ab89d06aa3c7b, < 3ddefcb8f75e312535e2e7d5fef9932019ba60f2 | ≥ 2f82f75f843445daa81e8b2a76774b1348033ce6, < d06daf0ad645d9225a3ff6958dd82e1f3988fa64 | ≥ 9126fd82e9edc7b4796f756e4b258d34f17e5e4a, < d7cc186d0973afce0e1237c37f7512c01981fb79 | ≥ 88c67aeb14070bab61d3dd8be96c8b42ebcaf53a, < 3a5b68869dbe14f1157c6a24ac71923db060eeab | ≥ 88c67aeb14070bab61d3dd8be96c8b42ebcaf53a, < 2191a54f63225b548fd8346be3611c3219a24738 | b4382b854975ae96fbfcc83a1d79b5c063c1aaa8 | ≥ 5.10.221, < 5.10.224 | ≥ 5.15.162, < 5.15.165 | ≥ 6.1.96, < 6.1.104 | ≥ 6.6.36, < 6.6.45 | ≥ 6.9.7, < 6.10 | 6.10
  • linux_kernel≥ 5.10.221, < 5.10.224 | ≥ 5.15.162, < 5.15.165 | ≥ 6.1.96, < 6.1.104 | ≥ 6.6.36, < 6.6.45 | ≥ 6.9.7, < 6.10 | ≥ 6.10, < 6.10.4 | 6.11:rc1
Debian1 product
  • linux< 6.1.106-1 | < 6.10.4-1

3 vendors · 119 products

References

24 links
Show all 24 references