CVE-2023-52752

Advisory lineage Upstream: 0 Downstream: 161
Analyzed
Published: 21 May 2024, 15:30
Last modified:23 May 2026, 15:26

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 15:30
Published
Vulnerability first disclosed
23 May 2026, 15:26
Last Modified
Vulnerability information updated

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

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 2abdf136784b7edaec7ffe0f4b461b63f9c4c4de | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 336a066990bb3962c46daf574ace596bda9303ce | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 558817597d5fbd7af31f891b67b0fd20f0d047b7 | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 89929ea46f9cc11ba66d2c64713aa5d5dc723b09 | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < 0ab6f842452ce2cae04209d4671ac6289d0aef8a | ≥ 7f48558e6489d032b1584b0cc9ac4bb11072c034, < d328c09ee9f15ee5a26431f5aad7c9239fa85e62 | a67172a013953664b1dad03c648200c70b90506c | ≥ 3.12.48, < 3.13 | 3.13

  • linux•linux_kernel

    < 5.10.237 | ≥ 5.11, < 5.15.181 | ≥ 5.16, < 6.1.64 | ≥ 6.2, < 6.5.13 | ≥ 6.6, < 6.6.3

References (7)