High · 8.2 CVE-2024-26980 EUVD-2024-24242GHSA-rmx7-cw76-79w4

ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf

Published May 1, 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-6.2 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-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-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-intel 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-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 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-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:

ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf

If ->ProtocolId is SMB2_TRANSFORM_PROTO_NUM, smb2 request size
validation could be skipped. if request size is smaller than
sizeof(struct smb2_query_info_req), slab-out-of-bounds read can happen in
smb2_allocate_rsp_buf(). This patch allocate response buffer after
decrypting transform request. smb3_decrypt_req() will validate transform
request size and avoid slab-out-of-bound in smb2_allocate_rsp_buf().

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	5.15	5.15.159

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	6.8.9-1	—
Debian 13	linux	6.8.9-1	—
Debian 12	linux	6.1.90-1	DSA-5680-1

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu Nvidia-BlueField 22.04 LTS	linux-bluefield	5.15.0-1050.52	—
Ubuntu 24.04 LTS	linux	6.8.0-38.38	USN-6893-1
Ubuntu 24.04 LTS	linux-aws	6.8.0-1011.12	USN-6893-3
Ubuntu 24.04 LTS	linux-azure	6.8.0-1010.10	USN-6893-1
Ubuntu 24.04 LTS	linux-gcp	6.8.0-1010.11	USN-6893-1
Ubuntu 24.04 LTS	linux-gke	6.8.0-1006.9	USN-6893-2
Ubuntu 24.04 LTS	linux-ibm +2	6.8.0-1008.8	USN-6918-1, USN-6893-1
Ubuntu 24.04 LTS	linux-intel	6.8.0-1007.14	USN-6893-1
Ubuntu 24.04 LTS	linux-nvidia	6.8.0-1009.9	USN-6893-2
Ubuntu 24.04 LTS	linux-raspi	6.8.0-1007.7	USN-6893-1
Ubuntu 24.04 LTS	linux-riscv +1	6.8.0-38.38.1	USN-6893-1
Ubuntu 22.04 LTS	linux +1	5.15.0-118.128	USN-6950-1
Ubuntu 22.04 LTS	linux-aws	5.15.0-1067.73	USN-6950-1
Ubuntu 22.04 LTS	linux-aws-6.8	6.8.0-1011.12~22.04.1	—
Ubuntu 22.04 LTS	linux-azure	5.15.0-1070.79	USN-6956-1
Ubuntu 22.04 LTS	linux-azure-6.8	6.8.0-1010.10~22.04.1	—
Ubuntu 22.04 LTS	linux-azure-fde	5.15.0-1070.79.1	USN-6956-1
Ubuntu 22.04 LTS	linux-gcp	5.15.0-1066.74	USN-6950-1
Ubuntu 22.04 LTS	linux-gke	5.15.0-1064.70	USN-6950-1
Ubuntu 22.04 LTS	linux-gkeop	5.15.0-1050.57	USN-6950-1
Ubuntu 22.04 LTS	linux-ibm +1	5.15.0-1060.63	USN-6950-2
Ubuntu 22.04 LTS	linux-intel-iotg	5.15.0-1062.68	USN-6950-1
Ubuntu 22.04 LTS	linux-kvm	5.15.0-1064.69	USN-6950-1
Ubuntu 22.04 LTS	linux-nvidia	5.15.0-1062.63	USN-6950-1
Ubuntu 22.04 LTS	linux-nvidia-6.8	6.8.0-1009.9~22.04.1	—
Ubuntu 22.04 LTS	linux-nvidia-tegra	5.15.0-1027.27	—
Ubuntu 22.04 LTS	linux-nvidia-tegra-igx	5.15.0-1015.15	—
Ubuntu 22.04 LTS	linux-oracle	5.15.0-1065.71	USN-6950-3
Ubuntu 22.04 LTS	linux-oracle-6.8	6.8.0-1008.8~22.04.1	—
Ubuntu 22.04 LTS	linux-riscv +31	No fix yet	—
Ubuntu 22.04 LTS	linux-xilinx-zynqmp	5.15.0-1035.39	USN-7019-1
Ubuntu 20.04 LTS	linux-aws-5.15	5.15.0-1067.73~20.04.1	USN-6950-2
Ubuntu 20.04 LTS	linux-azure-5.15	5.15.0-1070.79~20.04.1	USN-6956-1
Ubuntu 20.04 LTS	linux-azure-fde-5.15	5.15.0-1070.79~20.04.1.1	USN-6956-1
Ubuntu 20.04 LTS	linux-gcp-5.15	5.15.0-1066.74~20.04.1	USN-6950-1
Ubuntu 20.04 LTS	linux-gke +27	No fix yet	—
Ubuntu 20.04 LTS	linux-gkeop-5.15	5.15.0-1050.57~20.04.1	USN-6950-2
Ubuntu 20.04 LTS	linux-hwe-5.15 +1	5.15.0-118.128~20.04.1	USN-6950-4, USN-6950-1
Ubuntu 20.04 LTS	linux-ibm-5.15	5.15.0-1060.63~20.04.1	USN-6950-2
Ubuntu 20.04 LTS	linux-intel-iotg-5.15	5.15.0-1062.68~20.04.1	USN-6950-1
Ubuntu 20.04 LTS	linux-nvidia-tegra-5.15	5.15.0-1027.27~20.04.1	—
Ubuntu 20.04 LTS	linux-oracle-5.15	5.15.0-1065.71~20.04.1	USN-6957-1
Ubuntu 20.04 LTS	linux-riscv-5.15	5.15.0-1063.67~20.04.1	—
Ubuntu 18.04 LTS	linux-gcp +14	No fix yet	—

Show 5 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	6.8.0-2006.6	—
Ubuntu Pro Realtime 24.04 LTS	linux-realtime	6.8.1-1004.4	—
Ubuntu Pro Realtime 22.04 LTS	linux-intel-iot-realtime	5.15.0-1060.62	—
Ubuntu Pro Realtime 22.04 LTS	linux-realtime	5.15.0-1068.76	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-aws-fips	5.15.0-1067.73+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-azure-fips	5.15.0-1070.79+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-fips	5.15.0-118.128+fips1	—
Ubuntu Pro FIPS-updates 22.04 LTS	linux-gcp-fips	5.15.0-1066.74+fips1	—
Ubuntu Pro FIPS-preview 22.04 LTS	linux-fips +3	No fix yet	—

Advisories 13

USN-7019-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 26, 2026
USN-6950-1 linux, linux-aws, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6893-1 linux, linux-azure, linux-gcp, linux-ibm, linux-intel, linux-lowlatency, linux-oem-6.8, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6950-2 linux-aws-5.15, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6956-1 linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6893-2 linux-gke, linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6950-4 linux-hwe-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6957-1 linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6893-3 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6950-3 linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
USN-6918-1 linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
WID-SEC-2024-1008 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 12, 2026
DSA-5680-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026

References