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Vulnerability · Published May 19, 2024 · Assigned by Linux

CVE-2024-35869smb: client: guarantee refcounted children from parent session

Critical 9.8

In plain English

A critical-severity use-after-free 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 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 48.8% 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: smb: client: guarantee refcounted children from parent session Avoid potential use-after-free bugs when walking DFS referrals, mounting and performing DFS failover by ensuring that all children from parent @tcon->ses are also refcounted. They're all needed across the entire DFS mount. Get rid of @tcon->dfs_ses_list while we're at it, too.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.8.9-1DEBIAN-CVE-2024-35869
Debian:14linux6.8.9-1DEBIAN-CVE-2024-35869
Ubuntu:24.04:LTSlinux6.8.0-38.38UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-aws6.8.0-1011.12UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1011.12~22.04.1UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-azure6.8.0-1010.10UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1010.10~22.04.1UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-gcp6.8.0-1010.11UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-gke6.8.0-1006.9UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-ibm6.8.0-1008.8UBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-intel6.8.0-1007.14UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-38.38.1UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1009.9UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1009.9~22.04.1UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1008.8UBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-oracle6.8.0-1008.8UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1008.8~22.04.1UBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-raspi6.8.0-1007.7UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-35869
Ubuntu:24.04:LTSlinux-riscv6.8.0-38.38.1UBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-35869
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-35869

Affected products (as reported)

VendorProductVersions
Linux Linux 8e3554150d6c80a84b3cb046615d1a0e943811dc – before 645f332c6b63499cc76197f9b6bffcc659ba64cc8e3554150d6c80a84b3cb046615d1a0e943811dc – before e1db9ae87b7148c021daee1fcc4bc71b2ac58a798e3554150d6c80a84b3cb046615d1a0e943811dc – before 062a7f0ff46eb57aff526897bd2bebfdb1d3046af30d226bcc9f0e2d97b4a6e94c43a28148fbeab6c082c3be0f96e759ff2e361d929832fda0b938516.2.15 – before 6.36.3.2 – before 6.4
Linux Linux 6.4

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References