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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2023-52752smb: client: fix use-after-free bug in cifs_debug_data_proc_show()

High 7.8

In plain English

A high-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 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 84.1% 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: fix use-after-free bug in cifs_debug_data_proc_show() Skip SMB sessions that are being teared down (e.g. @ses->ses_status == SES_EXITING) in cifs_debug_data_proc_show() to avoid use-after-free in @ses. This fixes the following GPF when reading from /proc/fs/cifs/DebugData while mounting and umounting [ 816.251274] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI ... [ 816.260138] Call Trace: [ 816.260329] <TASK> [ 816.260499] ? die_addr+0x36/0x90 [ 816.260762] ? exc_general_protection+0x1b3/0x410 [ 816.261126] ? asm_exc_general_protection+0x26/0x30 [ 816.261502] ? cifs_debug_tcon+0xbd/0x240 [cifs] [ 816.261878] ? cifs_debug_tcon+0xab/0x240 [cifs] [ 816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [ 816.262689] ? seq_read_iter+0x379/0x470 [ 816.262995] seq_read_iter+0x118/0x470 [ 816.263291] proc_reg_read_iter+0x53/0x90 [ 816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.264750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 816.265135] RIP: 0033:0x7fd5e669d381

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.64-1DEBIAN-CVE-2023-52752
Debian:13linux6.6.8-1DEBIAN-CVE-2023-52752
Debian:14linux6.6.8-1DEBIAN-CVE-2023-52752
Ubuntu:22.04:LTSlinux5.15.0-117.127USN-6923-1
Ubuntu:22.04:LTSlinux5.15.0-117.127UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-aws5.15.0-1066.72USN-6923-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1066.72UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-azure5.15.0-1070.79USN-6956-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1070.79UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-52752
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-2023-52752
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gcp5.15.0-1065.73UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gcp5.15.0-1065.73USN-6923-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gke5.15.0-1063.69USN-6923-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1063.69UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1049.56USN-6923-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1049.56UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-ibm5.15.0-1059.62USN-6923-2
Ubuntu:22.04:LTSlinux-ibm5.15.0-1059.62UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1061.67UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1061.67USN-6923-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1063.68USN-6923-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1063.68UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-117.127USN-6923-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-117.127UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1061.62USN-6923-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1061.62UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-nvidia-6.56.5.0-1014.14UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1027.27UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oracle5.15.0-1064.70UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-oracle5.15.0-1064.70USN-6923-1
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-raspi5.15.0-1059.62UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-raspi5.15.0-1059.62USN-6923-2
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2023-52752
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39USN-7019-1

Affected products (as reported)

VendorProductVersions
Linux Linux 7f48558e6489d032b1584b0cc9ac4bb11072c034 – before 2abdf136784b7edaec7ffe0f4b461b63f9c4c4de7f48558e6489d032b1584b0cc9ac4bb11072c034 – before 336a066990bb3962c46daf574ace596bda9303ce7f48558e6489d032b1584b0cc9ac4bb11072c034 – before 558817597d5fbd7af31f891b67b0fd20f0d047b77f48558e6489d032b1584b0cc9ac4bb11072c034 – before 89929ea46f9cc11ba66d2c64713aa5d5dc723b097f48558e6489d032b1584b0cc9ac4bb11072c034 – before 0ab6f842452ce2cae04209d4671ac6289d0aef8a7f48558e6489d032b1584b0cc9ac4bb11072c034 – before d328c09ee9f15ee5a26431f5aad7c9239fa85e62a67172a013953664b1dad03c648200c70b90506c3.12.48 – before 3.13
Linux Linux 3.13

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

References