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Vulnerability · Published Feb 21, 2024 · Assigned by Linux

CVE-2023-52442ksmbd: validate session id and tree id in compound request

Critical 9.1

In plain English

A critical-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 29.6% (higher than 98% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)29.6%top 1.8% 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 session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.55-1DEBIAN-CVE-2023-52442
Debian:13linux6.5.3-1DEBIAN-CVE-2023-52442
Debian:14linux6.5.3-1DEBIAN-CVE-2023-52442
Ubuntu:22.04:LTSlinux5.15.0-102.112USN-6725-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-aws5.15.0-1057.63USN-6725-2
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-azure5.15.0-1060.69USN-6725-1
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1060.69.1USN-6725-1
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-gcp5.15.0-1055.63USN-6725-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-gke5.15.0-1054.59USN-6725-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1040.46USN-6725-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-ibm5.15.0-1050.53USN-6725-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1052.58USN-6725-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1054.59USN-6725-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-102.112USN-6725-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1048.48USN-6725-1
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-oracle5.15.0-1055.61USN-6725-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1050.53USN-6725-1
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-52442
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-52442

Affected products (as reported)

VendorProductVersions
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf – before 017d85c94f02090a87f4a473dbe0d6ee0da726930626e6641f6b467447c81dd7678a69c66f7746cf – before becb5191d1d5fdfca0198a2e37457bbbf4fe266f0626e6641f6b467447c81dd7678a69c66f7746cf – before 4c2b350b2e269e3fd17bbfa42de1b42775b777ac0626e6641f6b467447c81dd7678a69c66f7746cf – before 3df0411e132ee74a87aa13142dfd2b190275332e
Linux Linux 5.15

References