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CVE-2023-52480— ksmbd: fix race condition between session lookup and expire

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ksmbd_session_lookup 和 ksmbd_expire_session 之间存在竞争条件。

CVSS 9.8 · Critical EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux a6a9601ba995d0fec635324cb9fd8d14f9bea14e< c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f affected
1fc8a2b14ef5223f8e0b95faba2ee0a6e4d0f99d< a2ca5fd3dbcc665e1169044fa0c9e3eba779202b affected
ea174a91893956450510945a0c5d1a10b5323656< 18ced78b0ebccc2d16f426143dc56ab3aad666be affected
ea174a91893956450510945a0c5d1a10b5323656< 53ff5cf89142b978b1a5ca8dc4d4425e6a09745f affected
750a2d772e9d9ff377fd32e3b6797bf2cd847a7a affected
6775ee7ef4b37c521aa4cf3730f54554c4875542 affected
6.1.29< 6.1.57 affected
6.2.16< 6.3 affected
… +6 more rows
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I. Basic Information for CVE-2023-52480

Vulnerability Information
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Vulnerability Title
ksmbd: fix race condition between session lookup and expire
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix race condition between session lookup and expire Thread A + Thread B ksmbd_session_lookup | smb2_sess_setup sess = xa_load | | | xa_erase(&conn->sessions, sess->id); | | ksmbd_session_destroy(sess) --> kfree(sess) | // UAF! | sess->last_active = jiffies | + This patch add rwsem to fix race condition between ksmbd_session_lookup and ksmbd_expire_session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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ksmbd_session_lookup 和 ksmbd_expire_session 之间存在竞争条件。
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 a6a9601ba995d0fec635324cb9fd8d14f9bea14e ~ c77fd3e25a51ac92b0f1b347a96eff6a0b4f066f -
Linux Linux 6.4 -

II. Public POCs for CVE-2023-52480

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III. Intelligence Information for CVE-2023-52480

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Other References for CVE-2023-52480 (4)

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

CVE-2023-52478 8.8 HIGH HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
CVE-2023-52479 8.8 HIGH ksmbd: fix uaf in smb20_oplock_break_ack
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-2023-52480

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