Critical · 9.8 CVE-2024-50286 EUVD-2024-45177GHSA-jh47-c26g-fr5q

ksmbd: fix slab-use-after-free in ksmbd_smb2_session_create

Published Nov 19, 2024 · Updated Aug 5, 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-5.8 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-6.11 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-5.15 Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-azure-nvidia 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-6.11 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-6.11 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-6.11 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: Debian Ecosystem: Ubuntu

Description

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

ksmbd: fix slab-use-after-free in ksmbd_smb2_session_create

There is a race condition between ksmbd_smb2_session_create and
ksmbd_expire_session. This patch add missing sessions_table_lock
while adding/deleting session from global session table.

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	5.15	6.1.117

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.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	linux	6.11.9-1	—
Debian 13	linux	6.11.9-1	—
Debian 12	linux	6.1.119-1	DSA-5818-1
Debian 11	linux-6.1	6.1.119-1~deb11u1	DLA-4008-1

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu Nvidia-BlueField 22.04 LTS	linux-bluefield	No fix yet	—
Ubuntu 24.04 LTS	linux	6.8.0-58.60	USN-7449-1
Ubuntu 24.04 LTS	linux-aws	6.8.0-1027.29	USN-7449-1
Ubuntu 24.04 LTS	linux-azure	6.8.0-1027.32	USN-7449-1
Ubuntu 24.04 LTS	linux-azure-6.11	6.11.0-1012.12~24.04.1	—
Ubuntu 24.04 LTS	linux-azure-nvidia	6.8.0-1014.15	USN-7468-1
Ubuntu 24.04 LTS	linux-gcp	6.8.0-1028.30	USN-7450-1
Ubuntu 24.04 LTS	linux-gcp-6.11	6.11.0-1011.11~24.04.1	—
Ubuntu 24.04 LTS	linux-gke	6.8.0-1023.27	USN-7450-1
Ubuntu 24.04 LTS	linux-gkeop	6.8.0-1010.12	USN-7450-1
Ubuntu 24.04 LTS	linux-ibm	6.8.0-1024.24	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia	6.8.0-1026.29	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia-6.11	6.11.0-1007.7	—
Ubuntu 24.04 LTS	linux-nvidia-lowlatency	6.8.0-1026.29.1	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia-tegra	6.8.0-1008.8	—
Ubuntu 24.04 LTS	linux-oem-6.11	6.11.0-1015.15	USN-7310-1
Ubuntu 24.04 LTS	linux-oem-6.8	6.8.0-1026.26	USN-7449-1
Ubuntu 24.04 LTS	linux-oracle	6.8.0-1024.25	USN-7449-1
Ubuntu 24.04 LTS	linux-raspi	6.8.0-1028.32	USN-7524-1
Ubuntu 24.04 LTS	linux-realtime +1	No fix yet	—
Ubuntu 24.04 LTS	linux-riscv +1	6.8.0-58.60.1	USN-7449-1
Ubuntu 24.04 LTS	linux-xilinx	6.8.0-1017.18	—
Ubuntu 22.04 LTS	linux +49	No fix yet	—
Ubuntu 22.04 LTS	linux-aws-6.8	6.8.0-1027.29~22.04.1	USN-7451-1
Ubuntu 22.04 LTS	linux-azure-6.8	6.8.0-1027.32~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-gcp-6.8	6.8.0-1028.30~22.04.1	USN-7452-1
Ubuntu 22.04 LTS	linux-hwe-6.8	6.8.0-58.60~22.04.1	USN-7449-2
Ubuntu 22.04 LTS	linux-ibm-6.8	6.8.0-1024.24~22.04.1	—
Ubuntu 22.04 LTS	linux-nvidia-6.8	6.8.0-1026.29~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-oracle-6.8	6.8.0-1024.25~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-riscv-6.8 +1	6.8.0-58.60.1~22.04.1	USN-7449-1
Ubuntu 20.04 LTS	linux-gke +28	No fix yet	—
Ubuntu 18.04 LTS	linux-gcp +14	No fix yet	—

Show 7 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
Ubuntu 16.04 LTS	linux-hwe-edge	No fix yet	—
Ubuntu Pro Realtime 24.04 LTS	linux-raspi-realtime	6.8.0-2023.24	USN-7523-1
Ubuntu Pro Realtime 24.04 LTS	linux-realtime	6.8.1-1020.21	USN-7453-1
Ubuntu Pro Realtime 22.04 LTS	linux-realtime +1	No fix yet	—
Ubuntu Pro Realtime 22.04 LTS	linux-realtime-6.8	6.8.1-1020.21~22.04.1	—
Ubuntu Pro FIPS-updates 24.04 LTS	linux-fips	6.8.0-78.78+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-fips +3	No fix yet	—
Ubuntu Pro FIPS-preview 22.04 LTS	linux-fips +3	No fix yet	—
Ubuntu Pro 20.04 LTS	linux-aws-5.15 +10	No fix yet	—

Advisories 13

USN-7449-1 linux, linux-aws, linux-azure, linux-azure-6.8, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oem-6.8, linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7450-1 linux-gcp, linux-gke, linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7468-1 linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7453-1 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7451-1 linux-aws-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7524-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7523-1 linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7310-1 linux-oem-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7452-1 linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7449-2 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
WID-SEC-2024-3497 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 13, 2026
DLA-4008-1 linux-6.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
DSA-5818-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026

References