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CVE-2023-52479— ksmbd: fix uaf in smb20_oplock_break_ack

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于内存释放后重用。

CVSS 8.8 · High EPSS 0.61% · P48

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 694e13732e830cbbfedb562e57f28644927c33fd affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 8226ffc759ea59f10067b9acdf7f94bae1c69930 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< d5b0e9d3563e7e314a850e81f42b2ef6f39882f9 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< c69813471a1ec081a0b9bf0c6bd7e8afd818afce affected
5.15 affected
< 5.15 unaffected
5.15.135≤ 5.15.* unaffected
6.1.57≤ 6.1.* unaffected
… +2 more rows
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I. Basic Information for CVE-2023-52479

Vulnerability Information
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Vulnerability Title
ksmbd: fix uaf in smb20_oplock_break_ack
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix uaf in smb20_oplock_break_ack drop reference after use opinfo.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于内存释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 ~ 694e13732e830cbbfedb562e57f28644927c33fd -
Linux Linux 5.15 -

II. Public POCs for CVE-2023-52479

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2023-52479

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Other References for CVE-2023-52479 (4)

Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total

CVE-2023-52480 9.8 CRITICAL ksmbd: fix race condition between session lookup and expire
CVE-2023-52478 8.8 HIGH HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
CVE-2024-26620 8.2 HIGH s390/vfio-ap: always filter entire AP matrix
CVE-2024-26617 7.8 HIGH fs/proc/task_mmu: move mmu notification mechanism inside mm lock
CVE-2023-52483 7.8 HIGH mctp: perform route lookups under a RCU read-side lock
CVE-2023-52486 7.8 HIGH drm: Don't unref the same fb many times by mistake due to deadlock handling
CVE-2021-47061 7.8 HIGH KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2021-47060 7.8 HIGH KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
CVE-2023-52491 7.8 HIGH media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_
CVE-2024-26608 7.8 HIGH ksmbd: fix global oob in ksmbd_nl_policy
CVE-2024-26610 7.8 HIGH wifi: iwlwifi: fix a memory corruption
CVE-2024-26614 7.8 HIGH tcp: make sure init the accept_queue's spinlocks once
CVE-2021-47068 7.8 HIGH net/nfc: fix use-after-free llcp_sock_bind/connect
CVE-2024-26611 7.5 HIGH xsk: fix usage of multi-buffer BPF helpers for ZC XDP
CVE-2021-47066 7.1 HIGH async_xor: increase src_offs when dropping destination page
CVE-2021-47055 7.1 HIGH mtd: require write permissions for locking and badblock ioctls
CVE-2023-52497 7.1 HIGH erofs: fix lz4 inplace decompression
CVE-2024-26612 netfs, fscache: Prevent Oops in fscache_put_cache()
CVE-2024-26619 riscv: Fix module loading free order
CVE-2021-47065 rtw88: Fix array overrun in rtw_get_tx_power_params()

Showing top 20 of 53 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52479

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