cbcvebase.
CVE-2024-46858
published 2024-09-27

CVE-2024-46858: In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: Fix uaf in __timer_delete_sync There are two paths to access…

PriorityP430high7CVSS 3.1
AVLACHPRLUINSUCHIHAH
EPSS
0.26%
17.4th percentile
In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: Fix uaf in __timer_delete_sync There are two paths to access mptcp_pm_del_add_timer, result in a race condition: CPU1 CPU2 ==== ==== net_rx_action napi_poll netlink_sendmsg __napi_poll netlink_unicast process_backlog netlink_unicast_kernel __netif_receive_skb genl_rcv __netif_receive_skb_one_core netlink_rcv_skb NF_HOOK genl_rcv_msg ip_local_deliver_finish genl_family_rcv_msg ip_protocol_deliver_rcu genl_family_rcv_msg_doit tcp_v4_rcv mptcp_pm_nl_flush_addrs_doit tcp_v4_do_rcv mptcp_nl_remove_addrs_list tcp_rcv_established mptcp_pm_remove_addrs_and_subflows tcp_data_queue remove_anno_list_by_saddr mptcp_incoming_options mptcp_pm_del_add_timer mptcp_pm_del_add_timer kfree(entry) In remove_anno_list_by_saddr(running on CPU2), after leaving the critical zone protected by "pm.lock", the entry will be released, which leads to the occurrence of uaf in the mptcp_pm_del_add_timer(running on CPU1). Keeping a reference to add_timer inside the lock, and calling sk_stop_timer_sync() with this reference, instead of "entry->add_timer". Move list_del(&entry->list) to mptcp_pm_del_add_timer and inside the pm lock, do not directly access any members of the entry outside the pm lock, which can avoid similar "entry->x" uaf.

Affected

24 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
debianlinux-6.1< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
linuxlinux
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < 0e7814b028cd50b3ff79659d23dfa9da6a1e75e10e7814b028cd50b3ff79659d23dfa9da6a1e75e1
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < 3554482f4691571fc4b5490c17ae26896e62171c3554482f4691571fc4b5490c17ae26896e62171c
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < 67409b358500c71632116356a0b065f112d7b70767409b358500c71632116356a0b065f112d7b707
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < 6452b162549c7f9ef54655d3fb9977b9192e6e5b6452b162549c7f9ef54655d3fb9977b9192e6e5b
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < 12134a652b0a10064844ea235173e70246eba6dc12134a652b0a10064844ea235173e70246eba6dc
linuxlinux>= 00cfd77b9063dcdf3628a7087faba60de85a9cc8 < b4cd80b0338945a94972ac3ed54f8338d2da2076b4cd80b0338945a94972ac3ed54f8338d2da2076
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.112-16.1.112-1
linuxlinux_kernel>= 0 < 6.10.11-16.10.11-1
linuxlinux_kernel>= 0 < 6.10.11-16.10.11-1
linuxlinux_kernel>= 0 < 5.15.0-127.1375.15.0-127.137
linuxlinux_kernel>= 0 < 6.8.0-50.516.8.0-50.51
linuxlinux_kernel>= 5.10 < 6.1.1116.1.111
linuxlinux_kernel>= 6.2 < 6.6.526.6.52
linuxlinux_kernel>= 6.7 < 6.10.116.10.11
msrcazl3_kernel_6.6.51.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.56.1-5_on_azure_linux_3.0
msrcazure_linux_3.0_arm
msrcazure_linux_3.0_x64
msrccbl2_kernel_5.15.180.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.17.0HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.0HIGH
vendor_msrc7.0HIGH
vendor_redhat7.0HIGH
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.