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Vulnerability · Published May 1, 2024 · Assigned by Linux

CVE-2024-26936ksmbd: validate request buffer size in smb2_allocate_rsp_buf()

High 8.2

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.6%top 50.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate request buffer size in smb2_allocate_rsp_buf() The response buffer should be allocated in smb2_allocate_rsp_buf before validating request. But the fields in payload as well as smb2 header is used in smb2_allocate_rsp_buf(). This patch add simple buffer size validation to avoid potencial out-of-bounds in request buffer.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.90-1DEBIAN-CVE-2024-26936
Debian:12linux6.1.90-1DSA-5680-1
Debian:13linux6.8.9-1DEBIAN-CVE-2024-26936
Debian:14linux6.8.9-1DEBIAN-CVE-2024-26936
Ubuntu:22.04:LTSlinux5.15.0-118.128USN-6950-1
Ubuntu:22.04:LTSlinux5.15.0-118.128UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux6.8.0-38.38UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux6.8.0-38.38USN-6893-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-aws5.15.0-1067.73USN-6950-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1067.73UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-aws6.8.0-1011.12UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-aws6.8.0-1011.12USN-6893-3
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1011.12~22.04.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure5.15.0-1070.79UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure5.15.0-1070.79USN-6956-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1010.10USN-6893-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1010.10UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1010.10~22.04.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1070.79.1USN-6956-1
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1070.79.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gcp5.15.0-1066.74USN-6950-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1066.74UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-gcp6.8.0-1010.11UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-gcp6.8.0-1010.11USN-6893-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gke5.15.0-1064.70USN-6950-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1064.70UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-gke6.8.0-1006.9USN-6893-2
Ubuntu:24.04:LTSlinux-gke6.8.0-1006.9UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1050.57UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1050.57USN-6950-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-ibm5.15.0-1060.63UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-ibm5.15.0-1060.63USN-6950-2
Ubuntu:24.04:LTSlinux-ibm6.8.0-1008.8USN-6893-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1008.8UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-intel6.8.0-1007.14USN-6893-1
Ubuntu:24.04:LTSlinux-intel6.8.0-1007.14UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1062.68USN-6950-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1062.68UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-kvm5.15.0-1064.69UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-kvm5.15.0-1064.69USN-6950-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-118.128UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-118.128USN-6950-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-38.38.1UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-38.38.1USN-6893-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1062.63UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1062.63USN-6950-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1009.9USN-6893-2
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1009.9UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1009.9~22.04.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1027.27UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1008.8USN-6893-1
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1008.8UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oracle5.15.0-1065.71USN-6950-3
Ubuntu:22.04:LTSlinux-oracle5.15.0-1065.71UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-oracle6.8.0-1008.8USN-6918-1
Ubuntu:24.04:LTSlinux-oracle6.8.0-1008.8UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1008.8~22.04.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-raspi5.15.0-1060.63USN-6950-2
Ubuntu:22.04:LTSlinux-raspi5.15.0-1060.63UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-raspi6.8.0-1007.7UBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-raspi6.8.0-1007.7USN-6893-1
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-26936
Ubuntu:24.04:LTSlinux-riscv6.8.0-38.38.1UBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-26936
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39USN-7019-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2024-26936

Affected products (as reported)

VendorProductVersions
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf – before 8f3d0bf1d0c62b539d54c5b9108a845cff619b990626e6641f6b467447c81dd7678a69c66f7746cf – before 21ff9d7d223c5c19cb4334009e4c0c83a2f4d6740626e6641f6b467447c81dd7678a69c66f7746cf – before 5c20b242d4fed73a93591e48bfd9772e2322fb110626e6641f6b467447c81dd7678a69c66f7746cf – before 2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb60626e6641f6b467447c81dd7678a69c66f7746cf – before 17cf0c2794bdb6f39671265aa18aea5c22ee8c4a
Linux Linux 5.15

References