vulnerability

Ubuntu: (Multiple Advisories) (CVE-2023-52757): Linux kernel (Azure) vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
May 21, 2024
Added
Nov 19, 2024
Modified
Oct 23, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix potential deadlock when releasing mids

All release_mid() callers seem to hold a reference of @mid so there is
no need to call kref_put(&mid->refcount, __release_mid) under
@server->mid_lock spinlock. If they don't, then an use-after-free bug
would have occurred anyways.

By getting rid of such spinlock also fixes a potential deadlock as
shown below

CPU 0 CPU 1
------------------------------------------------------------------
cifs_demultiplex_thread() cifs_debug_data_proc_show()
release_mid()
spin_lock(&server->mid_lock);
spin_lock(&cifs_tcp_ses_lock)
spin_lock(&server->mid_lock)
__release_mid()
smb2_find_smb_tcon()
spin_lock(&cifs_tcp_ses_lock) *deadlock*

Solutions

ubuntu-upgrade-linux-image-4-15-0-1138-fipsubuntu-upgrade-linux-image-4-15-0-1145-oracleubuntu-upgrade-linux-image-4-15-0-1166-kvmubuntu-upgrade-linux-image-4-15-0-1176-gcpubuntu-upgrade-linux-image-4-15-0-1183-awsubuntu-upgrade-linux-image-4-15-0-1191-azureubuntu-upgrade-linux-image-4-15-0-2084-gcp-fipsubuntu-upgrade-linux-image-4-15-0-2100-azure-fipsubuntu-upgrade-linux-image-4-15-0-2121-aws-fipsubuntu-upgrade-linux-image-4-15-0-240-genericubuntu-upgrade-linux-image-4-15-0-240-lowlatencyubuntu-upgrade-linux-image-5-15-0-1030-nvidia-tegra-igxubuntu-upgrade-linux-image-5-15-0-1030-nvidia-tegra-igx-rtubuntu-upgrade-linux-image-5-15-0-1041-nvidia-tegraubuntu-upgrade-linux-image-5-15-0-1041-nvidia-tegra-rtubuntu-upgrade-linux-image-5-15-0-1052-xilinx-zynqmpubuntu-upgrade-linux-image-5-15-0-1070-gkeopubuntu-upgrade-linux-image-5-15-0-1075-azureubuntu-upgrade-linux-image-5-15-0-1078-azureubuntu-upgrade-linux-image-5-15-0-1080-ibmubuntu-upgrade-linux-image-5-15-0-1081-intel-iot-realtimeubuntu-upgrade-linux-image-5-15-0-1082-nvidiaubuntu-upgrade-linux-image-5-15-0-1082-nvidia-lowlatencyubuntu-upgrade-linux-image-5-15-0-1083-intel-iotgubuntu-upgrade-linux-image-5-15-0-1083-raspiubuntu-upgrade-linux-image-5-15-0-1084-kvmubuntu-upgrade-linux-image-5-15-0-1085-gkeubuntu-upgrade-linux-image-5-15-0-1085-oracleubuntu-upgrade-linux-image-5-15-0-1087-gcpubuntu-upgrade-linux-image-5-15-0-1087-gcp-fipsubuntu-upgrade-linux-image-5-15-0-1088-awsubuntu-upgrade-linux-image-5-15-0-1088-aws-64kubuntu-upgrade-linux-image-5-15-0-1088-aws-fipsubuntu-upgrade-linux-image-5-15-0-1088-realtimeubuntu-upgrade-linux-image-5-15-0-144-fipsubuntu-upgrade-linux-image-5-15-0-144-genericubuntu-upgrade-linux-image-5-15-0-144-generic-64kubuntu-upgrade-linux-image-5-15-0-144-generic-lpaeubuntu-upgrade-linux-image-5-15-0-144-lowlatencyubuntu-upgrade-linux-image-5-15-0-144-lowlatency-64kubuntu-upgrade-linux-image-5-4-0-1053-iotubuntu-upgrade-linux-image-5-4-0-1067-xilinx-zynqmpubuntu-upgrade-linux-image-5-4-0-1095-ibmubuntu-upgrade-linux-image-5-4-0-1108-bluefieldubuntu-upgrade-linux-image-5-4-0-1123-fipsubuntu-upgrade-linux-image-5-4-0-1132-raspiubuntu-upgrade-linux-image-5-4-0-1136-kvmubuntu-upgrade-linux-image-5-4-0-1147-oracleubuntu-upgrade-linux-image-5-4-0-1148-oracleubuntu-upgrade-linux-image-5-4-0-1149-awsubuntu-upgrade-linux-image-5-4-0-1149-aws-fipsubuntu-upgrade-linux-image-5-4-0-1152-gcpubuntu-upgrade-linux-image-5-4-0-1152-gcp-fipsubuntu-upgrade-linux-image-5-4-0-1154-azureubuntu-upgrade-linux-image-5-4-0-1155-azure-fipsubuntu-upgrade-linux-image-5-4-0-220-genericubuntu-upgrade-linux-image-5-4-0-220-generic-lpaeubuntu-upgrade-linux-image-5-4-0-220-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-4-15ubuntu-upgrade-linux-image-aws-5-15ubuntu-upgrade-linux-image-aws-5-4ubuntu-upgrade-linux-image-aws-64k-5-15ubuntu-upgrade-linux-image-aws-64k-lts-22-04ubuntu-upgrade-linux-image-aws-fipsubuntu-upgrade-linux-image-aws-fips-4-15ubuntu-upgrade-linux-image-aws-fips-5-15ubuntu-upgrade-linux-image-aws-fips-5-4ubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-aws-lts-18-04ubuntu-upgrade-linux-image-aws-lts-20-04ubuntu-upgrade-linux-image-aws-lts-22-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-4-15ubuntu-upgrade-linux-image-azure-5-4ubuntu-upgrade-linux-image-azure-cvmubuntu-upgrade-linux-image-azure-fipsubuntu-upgrade-linux-image-azure-fips-4-15ubuntu-upgrade-linux-image-azure-fips-5-4ubuntu-upgrade-linux-image-azure-lts-18-04ubuntu-upgrade-linux-image-azure-lts-20-04ubuntu-upgrade-linux-image-azure-lts-22-04ubuntu-upgrade-linux-image-bluefieldubuntu-upgrade-linux-image-bluefield-5-4ubuntu-upgrade-linux-image-fipsubuntu-upgrade-linux-image-fips-5-15ubuntu-upgrade-linux-image-fips-5-4ubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-4-15ubuntu-upgrade-linux-image-gcp-5-15ubuntu-upgrade-linux-image-gcp-5-4ubuntu-upgrade-linux-image-gcp-fipsubuntu-upgrade-linux-image-gcp-fips-4-15ubuntu-upgrade-linux-image-gcp-fips-5-15ubuntu-upgrade-linux-image-gcp-fips-5-4ubuntu-upgrade-linux-image-gcp-lts-18-04ubuntu-upgrade-linux-image-gcp-lts-20-04ubuntu-upgrade-linux-image-gcp-lts-22-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-5-15ubuntu-upgrade-linux-image-generic-5-4ubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-5-15ubuntu-upgrade-linux-image-generic-64k-hwe-20-04ubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-hwe-20-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-5-15ubuntu-upgrade-linux-image-generic-lpae-5-4ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-15ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-15ubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-5-15ubuntu-upgrade-linux-image-ibm-5-4ubuntu-upgrade-linux-image-ibm-lts-20-04ubuntu-u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References

    Title
    NEW

    Explore Exposure Command

    Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.