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CVE-2023-53608— nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()

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nilfs_segctor_thread函数中缺少适当保护，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< 034cce77d52ba013ce62b4f5258c29907eb1ada5 affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< 0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< 613bf23c070d11c525268f2945aa594704a9b764 affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< f32297dba338dc06d62286dedb3cdbd5175b1719 affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< 92684e02654c91a61a0b0561433b710bcece19fe affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< bae009a2f1b7c2011d2e92d8c84868d315c0b97e affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< b4d80bd6370b81a1725b6b8f7894802c23a14e9f affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453< 6be49d100c22ffea3287a4b19d7639d259888e33 affected
… +10 more rows
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I. Basic Information for CVE-2023-53608

Vulnerability Information
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Vulnerability Title
nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/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nilfs_segctor_thread函数中缺少适当保护，可能导致释放后重用。
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 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ~ 034cce77d52ba013ce62b4f5258c29907eb1ada5 -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2023-53608

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III. Intelligence Information for CVE-2023-53608

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Patches & Fixes for CVE-2023-53608 (1)

Same Patch Batch · Linux · 2025-10-04 · 144 CVEs total

CVE-2025-39932 9.8 CRITICAL smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
CVE-2025-39948 9.8 CRITICAL ice: fix Rx page leak on multi-buffer frames
CVE-2025-39946 9.8 CRITICAL tls: make sure to abort the stream if headers are bogus
CVE-2025-39933 9.4 CRITICAL smb: client: let recv_done verify data_offset, data_length and remaining_data_length
CVE-2025-39943 9.4 CRITICAL ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
CVE-2023-53600 9.1 CRITICAL tunnels: fix kasan splat when generating ipv4 pmtu error
CVE-2023-53615 8.8 HIGH scsi: qla2xxx: Fix deletion race condition
CVE-2025-39952 8.8 HIGH wifi: wilc1000: avoid buffer overflow in WID string configuration
CVE-2023-53589 8.8 HIGH wifi: iwlwifi: mvm: don't trust firmware n_channels
CVE-2023-53586 8.8 HIGH scsi: target: Fix multiple LUN_RESET handling
CVE-2022-50493 8.8 HIGH scsi: qla2xxx: Fix crash when I/O abort times out
CVE-2023-53598 8.4 HIGH bus: mhi: host: Range check CHDBOFF and ERDBOFF
CVE-2023-53560 7.8 HIGH tracing/histograms: Add histograms to hist_vars if they have referenced variables
CVE-2022-50492 7.8 HIGH drm/msm: fix use-after-free on probe deferral
CVE-2023-53559 7.8 HIGH ip_vti: fix potential slab-use-after-free in decode_session6
CVE-2023-53557 7.8 HIGH fprobe: Release rethook after the ftrace_ops is unregistered
CVE-2023-53556 7.8 HIGH iavf: Fix use-after-free in free_netdev
CVE-2023-53539 7.8 HIGH RDMA/rxe: Fix incomplete state save in rxe_requester
CVE-2023-53536 7.8 HIGH blk-crypto: make blk_crypto_evict_key() more robust
CVE-2023-53537 7.8 HIGH f2fs: fix to avoid use-after-free for cached IPU bio

Showing top 20 of 144 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53608

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