vulnerability

Ubuntu: (Multiple Advisories) (CVE-2023-52752): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
05/21/2024
Added
07/31/2024
Modified
01/28/2025

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]
[ 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

Solution(s)

ubuntu-upgrade-linux-image-4-15-0-1133-oracleubuntu-upgrade-linux-image-4-15-0-1154-kvmubuntu-upgrade-linux-image-4-15-0-1164-gcpubuntu-upgrade-linux-image-4-15-0-1170-awsubuntu-upgrade-linux-image-4-15-0-1179-azureubuntu-upgrade-linux-image-4-15-0-227-genericubuntu-upgrade-linux-image-4-15-0-227-lowlatencyubuntu-upgrade-linux-image-4-4-0-1134-awsubuntu-upgrade-linux-image-4-4-0-1135-kvmubuntu-upgrade-linux-image-4-4-0-1172-awsubuntu-upgrade-linux-image-4-4-0-257-genericubuntu-upgrade-linux-image-4-4-0-257-lowlatencyubuntu-upgrade-linux-image-5-15-0-1035-xilinx-zynqmpubuntu-upgrade-linux-image-5-15-0-1049-gkeopubuntu-upgrade-linux-image-5-15-0-1059-ibmubuntu-upgrade-linux-image-5-15-0-1059-raspiubuntu-upgrade-linux-image-5-15-0-1061-intel-iotgubuntu-upgrade-linux-image-5-15-0-1061-nvidiaubuntu-upgrade-linux-image-5-15-0-1061-nvidia-lowlatencyubuntu-upgrade-linux-image-5-15-0-1063-gkeubuntu-upgrade-linux-image-5-15-0-1063-kvmubuntu-upgrade-linux-image-5-15-0-1064-oracleubuntu-upgrade-linux-image-5-15-0-1065-gcpubuntu-upgrade-linux-image-5-15-0-1065-oracleubuntu-upgrade-linux-image-5-15-0-1066-awsubuntu-upgrade-linux-image-5-15-0-1070-azureubuntu-upgrade-linux-image-5-15-0-1070-azure-fdeubuntu-upgrade-linux-image-5-15-0-117-genericubuntu-upgrade-linux-image-5-15-0-117-generic-64kubuntu-upgrade-linux-image-5-15-0-117-generic-lpaeubuntu-upgrade-linux-image-5-15-0-117-lowlatencyubuntu-upgrade-linux-image-5-15-0-117-lowlatency-64kubuntu-upgrade-linux-image-5-4-0-1042-iotubuntu-upgrade-linux-image-5-4-0-1049-xilinx-zynqmpubuntu-upgrade-linux-image-5-4-0-1077-ibmubuntu-upgrade-linux-image-5-4-0-1090-bluefieldubuntu-upgrade-linux-image-5-4-0-1097-gkeopubuntu-upgrade-linux-image-5-4-0-1114-raspiubuntu-upgrade-linux-image-5-4-0-1118-kvmubuntu-upgrade-linux-image-5-4-0-1129-oracleubuntu-upgrade-linux-image-5-4-0-1130-awsubuntu-upgrade-linux-image-5-4-0-1134-gcpubuntu-upgrade-linux-image-5-4-0-1135-azureubuntu-upgrade-linux-image-5-4-0-192-genericubuntu-upgrade-linux-image-5-4-0-192-generic-lpaeubuntu-upgrade-linux-image-5-4-0-192-lowlatencyubuntu-upgrade-linux-image-awsubuntu-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-cvmubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-azure-fde-lts-22-04ubuntu-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-gcpubuntu-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-64kubuntu-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-hwe-20-04ubuntu-upgrade-linux-image-generic-lts-xenialubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-15ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-15ubuntu-upgrade-linux-image-gkeop-5-4ubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-lts-20-04ubuntu-upgrade-linux-image-intelubuntu-upgrade-linux-image-intel-iotgubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04ubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-hwe-20-04ubuntu-upgrade-linux-image-lowlatency-lts-xenialubuntu-upgrade-linux-image-nvidiaubuntu-upgrade-linux-image-nvidia-lowlatencyubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-20-04ubuntu-upgrade-linux-image-oem-20-04bubuntu-upgrade-linux-image-oem-20-04cubuntu-upgrade-linux-image-oem-20-04dubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-lts-18-04ubuntu-upgrade-linux-image-oracle-lts-20-04ubuntu-upgrade-linux-image-oracle-lts-22-04ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi-nolpaeubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-16-04ubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-hwe-20-04ubuntu-upgrade-linux-image-virtual-lts-xenialubuntu-upgrade-linux-image-xilinx-zynqmp
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