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CVE-2025-71125— tracing: Do not register unsupported perf events

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，该漏洞源于为不支持的事件注册了NULL函数指针，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1056 · Input Capture

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 4b147936fa509650beaf638b331573c23ba4d609< 6819bc6285c0ff835f67cfae7efebc03541782f6 affected
4b147936fa509650beaf638b331573c23ba4d609< 6d15f08e6d8d4b4fb02d90805ea97f3e2c1d6fbc affected
4b147936fa509650beaf638b331573c23ba4d609< f7305697b60d79bc69c0a6e280fc931b4e8862dd affected
4b147936fa509650beaf638b331573c23ba4d609< 65b1971147ec12f0b1cee0811c859a3d7d9b04ce affected
4b147936fa509650beaf638b331573c23ba4d609< 3437c775bf209c674ad66304213b6b3c3b1b3f69 affected
4b147936fa509650beaf638b331573c23ba4d609< 6df47e5bb9b62d72f186f826ab643ea1856877c7 affected
4b147936fa509650beaf638b331573c23ba4d609< ef7f38df890f5dcd2ae62f8dbde191d72f3bebae affected
4.17 affected
… +8 more rows
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I. Basic Information for CVE-2025-71125

Vulnerability Information
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Vulnerability Title
tracing: Do not register unsupported perf events
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Do not register unsupported perf events Synthetic events currently do not have a function to register perf events. This leads to calling the tracepoint register functions with a NULL function pointer which triggers: ------------[ cut here ]------------ WARNING: kernel/tracepoint.c:175 at tracepoint_add_func+0x357/0x370, CPU#2: perf/2272 Modules linked in: kvm_intel kvm irqbypass CPU: 2 UID: 0 PID: 2272 Comm: perf Not tainted 6.18.0-ftest-11964-ge022764176fc-dirty #323 PREEMPTLAZY Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 RIP: 0010:tracepoint_add_func+0x357/0x370 Code: 28 9c e8 4c 0b f5 ff eb 0f 4c 89 f7 48 c7 c6 80 4d 28 9c e8 ab 89 f4 ff 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc <0f> 0b 49 c7 c6 ea ff ff ff e9 ee fe ff ff 0f 0b e9 f9 fe ff ff 0f RSP: 0018:ffffabc0c44d3c40 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff9380aa9e4060 RCX: 0000000000000000 RDX: 000000000000000a RSI: ffffffff9e1d4a98 RDI: ffff937fcf5fd6c8 RBP: 0000000000000001 R08: 0000000000000007 R09: ffff937fcf5fc780 R10: 0000000000000003 R11: ffffffff9c193910 R12: 000000000000000a R13: ffffffff9e1e5888 R14: 0000000000000000 R15: ffffabc0c44d3c78 FS: 00007f6202f5f340(0000) GS:ffff93819f00f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d3162281a8 CR3: 0000000106a56003 CR4: 0000000000172ef0 Call Trace: <TASK> tracepoint_probe_register+0x5d/0x90 synth_event_reg+0x3c/0x60 perf_trace_event_init+0x204/0x340 perf_trace_init+0x85/0xd0 perf_tp_event_init+0x2e/0x50 perf_try_init_event+0x6f/0x230 ? perf_event_alloc+0x4bb/0xdc0 perf_event_alloc+0x65a/0xdc0 __se_sys_perf_event_open+0x290/0x9f0 do_syscall_64+0x93/0x7b0 ? entry_SYSCALL_64_after_hwframe+0x76/0x7e ? trace_hardirqs_off+0x53/0xc0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Instead, have the code return -ENODEV, which doesn't warn and has perf error out with: # perf record -e synthetic:futex_wait Error: The sys_perf_event_open() syscall returned with 19 (No such device) for event (synthetic:futex_wait). "dmesg | grep -i perf" may provide additional information. Ideally perf should support synthetic events, but for now just fix the warning. The support can come later.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于为不支持的事件注册了NULL函数指针，可能导致空指针取消引用。
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 4b147936fa509650beaf638b331573c23ba4d609 ~ 6819bc6285c0ff835f67cfae7efebc03541782f6 -
Linux Linux 4.17 -

II. Public POCs for CVE-2025-71125

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III. Intelligence Information for CVE-2025-71125

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71120 7.5 HIGH SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71111 hwmon: (w83791d) Convert macros to functions to avoid TOCTOU
CVE-2025-71110 mm/slub: reset KASAN tag in defer_free() before accessing freed memory
CVE-2025-71113 crypto: af_alg - zero initialize memory allocated via sock_kmalloc
CVE-2025-71114 via_wdt: fix critical boot hang due to unnamed resource allocation
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71102 scs: fix a wrong parameter in __scs_magic
CVE-2025-71105 f2fs: use global inline_xattr_slab instead of per-sb slab cache

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71125

Anonymous User
2026-01-15 06:08:15

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