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Unscored CVE-2024-26615 EUVD-2024-23877GHSA-cf55-f79q-6cgp

net/smc: fix illegal rmb_desc access in SMC-D connection dump

Published Feb 29, 2024 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux 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-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 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-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 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-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 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-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot 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-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 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-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-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime 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-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

net/smc: fix illegal rmb_desc access in SMC-D connection dump

A crash was found when dumping SMC-D connections. It can be reproduced
by following steps:

- run nginx/wrk test:
smc_run nginx
smc_run wrk -t 16 -c 1000 -d <duration> -H 'Connection: Close' <URL>

- continuously dump SMC-D connections in parallel:
watch -n 1 'smcss -D'

BUG: kernel NULL pointer dereference, address: 0000000000000030
CPU: 2 PID: 7204 Comm: smcss Kdump: loaded Tainted: G E 6.7.0+ #55
RIP: 0010:__smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag]
Call Trace:
<TASK>
? __die+0x24/0x70
? page_fault_oops+0x66/0x150
? exc_page_fault+0x69/0x140
? asm_exc_page_fault+0x26/0x30
? __smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag]
? __kmalloc_node_track_caller+0x35d/0x430
? __alloc_skb+0x77/0x170
smc_diag_dump_proto+0xd0/0xf0 [smc_diag]
smc_diag_dump+0x26/0x60 [smc_diag]
netlink_dump+0x19f/0x320
__netlink_dump_start+0x1dc/0x300
smc_diag_handler_dump+0x6a/0x80 [smc_diag]
? __pfx_smc_diag_dump+0x10/0x10 [smc_diag]
sock_diag_rcv_msg+0x121/0x140
? __pfx_sock_diag_rcv_msg+0x10/0x10
netlink_rcv_skb+0x5a/0x110
sock_diag_rcv+0x28/0x40
netlink_unicast+0x22a/0x330
netlink_sendmsg+0x1f8/0x420
__sock_sendmsg+0xb0/0xc0
____sys_sendmsg+0x24e/0x300
? copy_msghdr_from_user+0x62/0x80
___sys_sendmsg+0x7c/0xd0
? __do_fault+0x34/0x160
? do_read_fault+0x5f/0x100
? do_fault+0xb0/0x110
? __handle_mm_fault+0x2b0/0x6c0
__sys_sendmsg+0x4d/0x80
do_syscall_64+0x69/0x180
entry_SYSCALL_64_after_hwframe+0x6e/0x76

It is possible that the connection is in process of being established
when we dump it. Assumed that the connection has been registered in a
link group by smc_conn_create() but the rmb_desc has not yet been
initialized by smc_buf_create(), thus causing the illegal access to
conn->rmb_desc. So fix it by checking before dump.

Affected products

VendorProductAffectedFixed
Linux Linux 4.19 4.19.307

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 6.6.15-1 —
Debian 13 linux 6.6.15-1 —
Debian 12 linux 6.1.76-1 —
Debian 11 linux 5.10.216-1 DSA-5681-1
Debian 10 linux 4.19.316-1 DLA-3840-1
Debian 10 linux-5.10 5.10.216-1~deb10u1 DLA-3842-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1043.45 —
Ubuntu 22.04 LTS linux +1 5.15.0-106.116 USN-6766-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1061.67 USN-6766-3
Ubuntu 22.04 LTS linux-azure 5.15.0-1063.72 USN-6766-1
Ubuntu 22.04 LTS linux-azure-6.5 6.5.0-1022.23~22.04.1 USN-6819-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1063.72.1 USN-6766-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1059.67 USN-6766-1
Ubuntu 22.04 LTS linux-gcp-6.5 6.5.0-1022.24~22.04.1 USN-6818-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1058.63 USN-6766-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1044.51 USN-6766-1
Ubuntu 22.04 LTS linux-hwe-6.5 6.5.0-41.41~22.04.2 USN-6818-4
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1054.57 USN-6766-2, USN-6766-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1057.63 USN-6795-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.5 6.5.0-41.41.1~22.04.1 USN-6818-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1054.55 USN-6766-1
Ubuntu 22.04 LTS linux-nvidia-6.5 6.5.0-1021.22 USN-6818-3
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1026.26 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1015.15 —
Ubuntu 22.04 LTS linux-oem-6.5 6.5.0-1024.25 USN-6819-3
Ubuntu 22.04 LTS linux-oracle 5.15.0-1059.65 USN-6766-1
Ubuntu 22.04 LTS linux-oracle-6.5 6.5.0-1024.24~22.04.1 USN-6819-4
Ubuntu 22.04 LTS linux-riscv +22 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.5 6.5.0-40.40.1~22.04.1 —
Ubuntu 22.04 LTS linux-starfive-6.5 6.5.0-1015.16~22.04.1 USN-6819-1
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1030.34 —
Ubuntu 20.04 LTS linux 5.4.0-181.201 USN-6767-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1124.134 USN-6767-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1061.67~20.04.1 USN-6766-3
Ubuntu 20.04 LTS linux-azure 5.4.0-1129.136 USN-6767-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1063.72~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1063.72~20.04.1.1 USN-6766-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1084.91 USN-6767-2
Ubuntu 20.04 LTS linux-gcp 5.4.0-1128.137 USN-6767-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1059.67~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1091.95 USN-6767-1
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1044.51~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-106.116~20.04.1 USN-6766-2, USN-6766-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1071.76 USN-6767-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1054.57~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1058.64~20.04.1 USN-6828-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1036.37 USN-6767-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1112.119 USN-6767-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1027.27~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1123.132 USN-6767-1
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1059.65~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-raspi 5.4.0-1108.120 USN-6767-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1057.61~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1043.47 USN-6767-1
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2001.1 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1054.56 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1062.70 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1061.67+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1063.72+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-106.116+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1059.67+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1124.134+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1129.136+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1098.108 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1128.137+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1124.134~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1129.136~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1128.137~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-181.201~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1071.76~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1123.132~18.04.1 USN-6767-1
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1108.120~18.04.1 USN-6767-1
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.4.0-503.16.1.el9_5 RHSA-2024:10939
RHEL 9 rv +65 5.14.0-503.16.1.el9_5 RHSA-2024:10939
RHEL 8 kernel-rt +12 4.18.0-553.5.1.rt7.346.el8_10 RHSA-2024:3627
RHEL 8 perf +26 4.18.0-553.5.1.el8_10 RHSA-2024:3618
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.47.1.el9_4 RHSA-2024:10771
RHEL 9.4 EUS rv +64 5.14.0-427.47.1.el9_4 RHSA-2024:10771

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 9 bpftool 7.4.0-503.16.1.el9_5 ALSA-2024:10939
AlmaLinux 9 rv +61 5.14.0-503.16.1.el9_5 ALSA-2024:10939
AlmaLinux 8 kernel-rt +11 4.18.0-553.5.1.rt7.346.el8_10 ALSA-2024:3627
AlmaLinux 8 perf +24 4.18.0-553.5.1.el8_10 ALSA-2024:3618

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.5.1.el8_10 RLSA-2024:3618
Rocky Linux 8 kernel-rt 4.18.0-553.5.1.rt7.346.el8_10 RLSA-2024:3627
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +5 6.4.0-150600.23.17.1 SUSE-SU-2024:2802-1
SLES 15 SP6 kernel-azure +1 6.4.0-150600.8.8.2 SUSE-SU-2024:2896-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.17.1.150600.12.6.2 SUSE-SU-2024:2802-1
SLES 15 SP6 kernel-docs 6.4.0-150600.23.17.3 SUSE-SU-2024:2802-1
SLES 15 SP6 kernel-syms-azure 6.4.0-150600.8.8.1 SUSE-SU-2024:2896-1
SLES 15 SP5 kernel-64kb +5 5.14.21-150500.55.73.1 SUSE-SU-2024:2939-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.63.1 SUSE-SU-2024:2947-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.73.1.150500.6.33.8 SUSE-SU-2024:2939-1
SLES 15 SP5 kernel-docs 5.14.21-150500.55.73.2 SUSE-SU-2024:2939-1
SLES 12 SP5 kernel-azure +2 4.12.14-16.194.1 SUSE-SU-2024:2901-1
SLES 12 SP5 kernel-docs 4.12.14-122.225.2 SUSE-SU-2024:2940-1
SLES 12 SP5 kernel-syms +3 4.12.14-122.225.1 SUSE-SU-2024:2940-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.194.1 SUSE-SU-2024:2901-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.225.1 SUSE-SU-2024:2940-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.197.1 SUSE-SU-2024:2892-1
SLE Micro 6.0 kernel-default-base 6.4.0-17.1.1.51 SUSE-SU-2025:20008-1
SLE Micro 6.0 kernel-rt +1 6.4.0-9.1 SUSE-SU-2025:20028-1
SLE Micro 6.0 kernel-source +2 6.4.0-18.1 SUSE-SU-2025:20008-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.73.1 SUSE-SU-2024:2939-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.73.1.150500.6.33.8 SUSE-SU-2024:2939-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.64.1 SUSE-SU-2024:2894-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.17.1 SUSE-SU-2024:2802-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_1 1-150600.1.5.1 SUSE-SU-2024:2973-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_3 1-150600.13.3.1 SUSE-SU-2024:2802-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.73.1 SUSE-SU-2024:2939-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_17 +1 1-150500.11.3.1 SUSE-SU-2024:2939-1, SUSE-SU-2024:2894-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.225.1 SUSE-SU-2024:2940-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_59 1-8.3.1 SUSE-SU-2024:2940-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.5.1 SUSE-SU-2024:2973-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.64.1 SUSE-SU-2024:2894-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +9 6.4.0-150600.23.17.1 SUSE-SU-2024:2802-1
openSUSE Leap 15.6 kernel-azure +1 6.4.0-150600.8.8.2 SUSE-SU-2024:2896-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.17.1.150600.12.6.2 SUSE-SU-2024:2802-1
openSUSE Leap 15.6 kernel-docs 6.4.0-150600.23.17.3 SUSE-SU-2024:2802-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.5.1 SUSE-SU-2024:2973-1
openSUSE Leap 15.6 kernel-syms-azure 6.4.0-150600.8.8.1 SUSE-SU-2024:2896-1
openSUSE Leap 15.5 dtb-aarch64 +9 5.14.21-150500.55.73.1 SUSE-SU-2024:2939-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.63.1 SUSE-SU-2024:2947-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.73.1.150500.6.33.8 SUSE-SU-2024:2939-1
openSUSE Leap 15.5 kernel-docs 5.14.21-150500.55.73.2 SUSE-SU-2024:2939-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.64.1 SUSE-SU-2024:2894-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-default 5.14.21-150500.55.73.1 SUSE-SU-2024:2939-1
openSUSE Leap Micro 5.5 kernel-default-base 5.14.21-150500.55.73.1.150500.6.33.8 SUSE-SU-2024:2939-1
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.64.1 SUSE-SU-2024:2894-1

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.4.0-503.16.1.el9_5 ELSA-2024-10939
Oracle Linux 9 rv +28 5.14.0-503.16.1.el9_5 ELSA-2024-10939
Oracle Linux 8 perf +19 4.18.0-553.5.1.el8_10 ELSA-2024-3618

Advisories 41

References