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CVE-2025-40081— perf: arm_spe: Prevent overflow in PERF_IDX2OFF()

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，该漏洞源于未将nr_pages转换为unsigned long类型，可能导致PERF_IDX2OFF函数溢出。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d5d9696b03808bc6be723cc85288c912c3a05606< 656e9a5d69acdd1b20462f4a33378b90ddcb9626 affected
d5d9696b03808bc6be723cc85288c912c3a05606< 9c045d4501f7f70724a3bbb561f4f22d292bbfe6 affected
d5d9696b03808bc6be723cc85288c912c3a05606< 5d01f2b81568289443d22f1e13a363f829de6343 affected
d5d9696b03808bc6be723cc85288c912c3a05606< 7500384d3c9587593d75ded3b006835e7aa73ef8 affected
d5d9696b03808bc6be723cc85288c912c3a05606< 379cae2cb982f571cda9493ac573ab71125fd299 affected
d5d9696b03808bc6be723cc85288c912c3a05606< 1a19ba8e1f4ff24ece8ca69b79df8442c431db90 affected
d5d9696b03808bc6be723cc85288c912c3a05606< e516cfd19b0f4c774a57b17fb43a7f41991f0735 affected
d5d9696b03808bc6be723cc85288c912c3a05606< a29fea30dd93da16652930162b177941abd8c75e affected
… +10 more rows
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I. Basic Information for CVE-2025-40081

Vulnerability Information
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Vulnerability Title
perf: arm_spe: Prevent overflow in PERF_IDX2OFF()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: perf: arm_spe: Prevent overflow in PERF_IDX2OFF() Cast nr_pages to unsigned long to avoid overflow when handling large AUX buffer sizes (>= 2 GiB).
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，该漏洞源于未将nr_pages转换为unsigned long类型，可能导致PERF_IDX2OFF函数溢出。
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 d5d9696b03808bc6be723cc85288c912c3a05606 ~ 656e9a5d69acdd1b20462f4a33378b90ddcb9626 -
Linux Linux 4.15 -

II. Public POCs for CVE-2025-40081

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III. Intelligence Information for CVE-2025-40081

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Patches & Fixes for CVE-2025-40081 (6)

Vendor Advisories for CVE-2025-40081 (1)

Other References for CVE-2025-40081 (1)

Same Patch Batch · Linux · 2025-10-28 · 58 CVEs total

CVE-2025-40074 9.8 CRITICAL ipv4: start using dst_dev_rcu()
CVE-2025-40043 8.8 HIGH net: nfc: nci: Add parameter validation for packet data
CVE-2025-40039 8.8 HIGH ksmbd: Fix race condition in RPC handle list access
CVE-2025-40058 8.8 HIGH iommu/vt-d: Disallow dirty tracking if incoherent page walk
CVE-2025-40046 8.6 HIGH io_uring/zcrx: fix overshooting recv limit
CVE-2025-40068 8.4 HIGH fs: ntfs3: Fix integer overflow in run_unpack()
CVE-2025-40075 8.1 HIGH tcp_metrics: use dst_dev_net_rcu()
CVE-2025-40026 7.9 HIGH KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O
CVE-2025-40067 7.8 HIGH fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist
CVE-2025-40061 7.8 HIGH RDMA/rxe: Fix race in do_task() when draining
CVE-2025-40028 7.8 HIGH binder: fix double-free in dbitmap
CVE-2025-40064 7.8 HIGH smc: Fix use-after-free in __pnet_find_base_ndev().
CVE-2025-40069 7.8 HIGH drm/msm: Fix obj leak in VM_BIND error path
CVE-2025-40027 7.8 HIGH net/9p: fix double req put in p9_fd_cancelled
CVE-2025-40025 7.8 HIGH f2fs: fix to do sanity check on node footer for non inode dnode
CVE-2025-40044 7.8 HIGH fs: udf: fix OOB read in lengthAllocDescs handling
CVE-2025-40045 7.8 HIGH ASoC: codecs: wcd937x: set the comp soundwire port correctly
CVE-2025-40051 7.8 HIGH vhost: vringh: Modify the return value check
CVE-2025-40047 7.8 HIGH io_uring/waitid: always prune wait queue entry in io_waitid_wait()
CVE-2025-40041 7.8 HIGH LoongArch: BPF: Sign-extend struct ops return values properly

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40081

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