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High · 8.1 CVE-2024-46858 EUVD-2024-42119GHSA-4mm4-rvx3-h58h

mptcp: pm: Fix uaf in __timer_delete_sync

Published Sep 27, 2024 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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 products

VendorProductAffectedFixed
Linux Linux 5.10 5.10.227

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.10.11-1 —
Debian 13 linux 6.10.11-1 —
Debian 12 linux 6.1.112-1 DSA-5782-1
Debian 11 linux 5.10.234-1 DLA-4075-1
Debian 11 linux-6.1 6.1.119-1~deb11u1 DLA-4008-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1057.59 —
Ubuntu 24.04 LTS linux 6.8.0-50.51 USN-7154-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1020.22 USN-7154-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1020.23 USN-7196-1
Ubuntu 24.04 LTS linux-gcp +1 6.8.0-1019.21 USN-7155-1, USN-7154-1
Ubuntu 24.04 LTS linux-gke 6.8.0-1015.19 USN-7154-1
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1002.4 USN-7156-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1017.17 USN-7154-1
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1019.21.1 USN-7155-1
Ubuntu 24.04 LTS linux-oem-6.8 6.8.0-1018.18 USN-7154-1
Ubuntu 24.04 LTS linux-oracle +1 6.8.0-1017.18 USN-7154-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1016.18 USN-7154-1
Ubuntu 24.04 LTS linux-riscv +1 6.8.0-50.51.1 USN-7154-1
Ubuntu 22.04 LTS linux +1 5.15.0-127.137 USN-7166-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1073.79 USN-7166-2
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1020.22~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1078.87 USN-7186-2
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1020.23~22.04.1 USN-7196-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1078.87.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1072.80 USN-7166-1
Ubuntu 22.04 LTS linux-gcp-6.8 +1 6.8.0-1019.21~22.04.1 USN-7155-1, USN-7154-1
Ubuntu 22.04 LTS linux-gke 5.15.0-1070.76 USN-7166-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1056.63 USN-7166-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-50.51~22.04.1 USN-7154-2
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1066.69 USN-7166-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1017.17~22.04.1 —
Ubuntu 22.04 LTS linux-kvm 5.15.0-1070.75 USN-7166-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1068.69 USN-7166-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1032.32 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1020.20 —
Ubuntu 22.04 LTS linux-oracle +1 5.15.0-1071.77 USN-7186-1, USN-7166-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1017.18~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 +1 6.8.0-50.51.1~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1039.43 USN-7166-4
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1073.79~20.04.1 USN-7166-2
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1078.87~20.04.1 USN-7194-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1072.80~20.04.1 USN-7166-1
Ubuntu 20.04 LTS linux-gke +27 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-127.137~20.04.1 USN-7166-3, USN-7166-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1066.69~20.04.1 USN-7166-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1032.32~20.04.1 —
Ubuntu 20.04 LTS linux-oracle-5.15 +1 5.15.0-1071.77~20.04.1 USN-7186-2, USN-7166-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1069.73~20.04.1 —
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2015.16 —
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1013.14 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1066.68 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1074.82 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1013.14~22.04.1 —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1073.79+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1078.87+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-127.137+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1072.80+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.4.0-503.14.1.el9_5 RHSA-2024:9605
RHEL 9 rv +65 5.14.0-503.14.1.el9_5 RHSA-2024:9605
RHEL 8 perf +26 4.18.0-553.30.1.el8_10 RHSA-2024:10281
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.44.1.el9_4 RHSA-2024:9546
RHEL 9.4 EUS rv +64 5.14.0-427.44.1.el9_4 RHSA-2024:9546
RHEL 9.2 EUS bpftool 7.0.0-284.92.1.el9_2 RHSA-2024:9497
RHEL 9.2 EUS kernel-rt +14 5.14.0-284.92.1.rt14.377.el9_2 RHSA-2024:9498
RHEL 9.2 EUS perf +47 5.14.0-284.92.1.el9_2 RHSA-2024:9497
RHEL 9.0 E4S kernel-rt +12 5.14.0-70.121.1.rt21.193.el9_0 RHSA-2024:9943
RHEL 9.0 E4S perf +28 5.14.0-70.121.1.el9_0 RHSA-2024:9942
RHEL 8.8 EUS perf +26 4.18.0-477.81.1.el8_8 RHSA-2024:10262
RHEL 8.6 TUS perf +17 4.18.0-372.129.1.el8_6 RHSA-2024:9500
RHEL 8.6 E4S perf +25 4.18.0-372.129.1.el8_6 RHSA-2024:9500
RHEL 8.6 AUS perf +17 4.18.0-372.129.1.el8_6 RHSA-2024:9500
RHEL 8.4 TUS perf +17 4.18.0-305.145.1.el8_4 RHSA-2024:10265
RHEL 8.4 E4S perf +18 4.18.0-305.145.1.el8_4 RHSA-2024:10265
RHEL 8.4 AUS perf +17 4.18.0-305.145.1.el8_4 RHSA-2024:10265

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 9 bpftool 7.4.0-503.14.1.el9_5 ALSA-2024:9605
AlmaLinux 9 rv +61 5.14.0-503.14.1.el9_5 ALSA-2024:9605
AlmaLinux 8 perf +24 4.18.0-553.30.1.el8_10 ALSA-2024:10281

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.30.1.el8_10 RLSA-2024:10281
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.38.1 SUSE-SU-2025:0499-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.31.1 SUSE-SU-2025:0847-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.15.coco15sp6.1 SUSE-SU-2025:0564-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.38.1.150600.12.16.2 SUSE-SU-2025:0499-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.94.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.94.1.150500.6.43.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
Show 8 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.94.1.150500.6.43.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.94.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLE Micro 6.1 kernel-default-base 6.4.0-28.1.21.6 SUSE-SU-2025:20270-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_6 +1 1-3.1 SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1
SLE Micro 6.1 kernel-rt +4 6.4.0-28.1 SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1
SLE Micro 6.0 kernel-default-base 6.4.0-28.1.21.6 SUSE-SU-2025:20192-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_6 +1 1-3.1 SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1
SLE Micro 6.0 kernel-rt +4 6.4.0-28.1 SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.94.1.150500.6.43.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.85.1 SUSE-SU-2025:0556-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.94.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.38.1 SUSE-SU-2025:0499-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_8 1-150600.1.3.1 SUSE-SU-2025:0557-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_8 1-150600.13.3.2 SUSE-SU-2025:0499-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.94.1 SUSE-SU-2025:0577-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_23 1-150500.11.3.1 SUSE-SU-2025:0577-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.94.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.94.1.150500.6.43.1 SUSE-SU-2025:0577-2, SUSE-SU-2025:0577-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.26.1 SUSE-SU-2025:0557-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.38.1 SUSE-SU-2025:0499-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.31.1 SUSE-SU-2025:0847-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.38.1.150600.12.16.2 SUSE-SU-2025:0499-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.26.1 SUSE-SU-2025:0557-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.111-120.187 1.0-0.amzn2023 ALAS2023-2024-744
Amazon Linux 2023 perf +14 6.1.111-120.187.amzn2023 ALAS2023-2024-744

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.56.1-5 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.4.0-503.14.1.el9_5 ELSA-2024-9605
Oracle Linux 9 rv +28 5.14.0-503.14.1.el9_5 ELSA-2024-9605
Oracle Linux 8 kernel-uek +12 5.15.0-303.171.5.2.el9uek ELSA-2024-12887
Oracle Linux 8 perf +19 4.18.0-553.30.1.el8_10 ELSA-2024-12887, ELSA-2024-10281

Advisories 44

References