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CVE-2023-53557— fprobe: Release rethook after the ftrace_ops is unregistered

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fprobe在ftrace_ops注销后未释放rethook，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 5b0ab78998e32564a011b14c4c7f9c81e2d42b9d< ce3ec57faff559ccae1e0150c1f077eb2df648a4 affected
5b0ab78998e32564a011b14c4c7f9c81e2d42b9d< 03d63255a5783243c110aec5e6ae2f1475c3be76 affected
5b0ab78998e32564a011b14c4c7f9c81e2d42b9d< 5f81018753dfd4989e33ece1f0cb6b8aae498b82 affected
5.18 affected
< 5.18 unaffected
6.1.40≤ 6.1.* unaffected
6.4.5≤ 6.4.* unaffected
6.5≤ * unaffected
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I. Basic Information for CVE-2023-53557

Vulnerability Information
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Vulnerability Title
fprobe: Release rethook after the ftrace_ops is unregistered
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fprobe: Release rethook after the ftrace_ops is unregistered While running bpf selftests it's possible to get following fault: general protection fault, probably for non-canonical address \ 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI ... Call Trace: <TASK> fprobe_handler+0xc1/0x270 ? __pfx_bpf_testmod_init+0x10/0x10 ? __pfx_bpf_testmod_init+0x10/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_testmod_init+0x22/0x80 ? do_one_initcall+0x63/0x2e0 ? rcu_is_watching+0xd/0x40 ? kmalloc_trace+0xaf/0xc0 ? do_init_module+0x60/0x250 ? __do_sys_finit_module+0xac/0x120 ? do_syscall_64+0x37/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc </TASK> In unregister_fprobe function we can't release fp->rethook while it's possible there are some of its users still running on another cpu. Moving rethook_free call after fp->ops is unregistered with unregister_ftrace_function call.
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fprobe在ftrace_ops注销后未释放rethook，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 5b0ab78998e32564a011b14c4c7f9c81e2d42b9d ~ ce3ec57faff559ccae1e0150c1f077eb2df648a4 -
Linux Linux 5.18 -

II. Public POCs for CVE-2023-53557

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III. Intelligence Information for CVE-2023-53557

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Patches & Fixes for CVE-2023-53557 (3)

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-2023-53552 7.8 HIGH drm/i915: mark requests for GuC virtual engines to avoid use-after-free
CVE-2023-53566 7.8 HIGH netfilter: nft_set_rbtree: fix null deref on element insertion
CVE-2023-53560 7.8 HIGH tracing/histograms: Add histograms to hist_vars if they have referenced variables
CVE-2023-53559 7.8 HIGH ip_vti: fix potential slab-use-after-free in decode_session6
CVE-2023-53537 7.8 HIGH f2fs: fix to avoid use-after-free for cached IPU bio
CVE-2023-53539 7.8 HIGH RDMA/rxe: Fix incomplete state save in rxe_requester
CVE-2023-53545 7.8 HIGH drm/amdgpu: unmap and remove csa_va properly
CVE-2025-39931 7.8 HIGH crypto: af_alg - Set merge to zero early in af_alg_sendmsg

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-2023-53557

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