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CVE-2025-71197— w1: therm: Fix off-by-one buffer overflow in alarms_store

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，该漏洞源于缓冲区大小计算错误，可能导致缓冲区溢出。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux e2c94d6f572079511945e64537eb1218643f2e68< 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95 affected
e2c94d6f572079511945e64537eb1218643f2e68< 060b08d72a38b158a7f850d4b83c17c2969e0f6b affected
e2c94d6f572079511945e64537eb1218643f2e68< b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf affected
e2c94d6f572079511945e64537eb1218643f2e68< 6a5820ecfa5a76c3d3e154802c8c15f391ef442e affected
e2c94d6f572079511945e64537eb1218643f2e68< 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0 affected
e2c94d6f572079511945e64537eb1218643f2e68< e6b2609af21b5cccc9559339591b8a2cbf884169 affected
e2c94d6f572079511945e64537eb1218643f2e68< 761fcf46a1bd797bd32d23f3ea0141ffd437668a affected
5.8 affected
… +8 more rows
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I. Basic Information for CVE-2025-71197

Vulnerability Information
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Vulnerability Title
w1: therm: Fix off-by-one buffer overflow in alarms_store
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: w1: therm: Fix off-by-one buffer overflow in alarms_store The sysfs buffer passed to alarms_store() is allocated with 'size + 1' bytes and a NUL terminator is appended. However, the 'size' argument does not account for this extra byte. The original code then allocated 'size' bytes and used strcpy() to copy 'buf', which always writes one byte past the allocated buffer since strcpy() copies until the NUL terminator at index 'size'. Fix this by parsing the 'buf' parameter directly using simple_strtoll() without allocating any intermediate memory or string copying. This removes the overflow while simplifying the code.
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，该漏洞源于缓冲区大小计算错误，可能导致缓冲区溢出。
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 e2c94d6f572079511945e64537eb1218643f2e68 ~ 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95 -
Linux Linux 5.8 -

II. Public POCs for CVE-2025-71197

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III. Intelligence Information for CVE-2025-71197

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Same Patch Batch · Linux · 2026-02-04 · 79 CVEs total

CVE-2026-23098 8.8 HIGH netrom: fix double-free in nr_route_frame()
CVE-2026-23066 7.8 HIGH rxrpc: Fix recvmsg() unconditional requeue
CVE-2026-23074 7.8 HIGH net/sched: Enforce that teql can only be used as root qdisc
CVE-2026-23077 7.8 HIGH mm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge
CVE-2026-23105 7.8 HIGH net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag
CVE-2026-23103 7.8 HIGH ipvlan: Make the addrs_lock be per port
CVE-2026-23095 7.5 HIGH gue: Fix skb memleak with inner IP protocol 0.
CVE-2025-71192 7.0 HIGH ALSA: ac97: fix a double free in snd_ac97_controller_register()
CVE-2026-23064 net/sched: act_ife: avoid possible NULL deref
CVE-2026-23065 platform/x86/amd: Fix memory leak in wbrf_record()
CVE-2026-23067 iommu/io-pgtable-arm: fix size_t signedness bug in unmap path
CVE-2026-23042 idpf: fix aux device unplugging when rdma is not supported by vport
CVE-2026-23060 crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec
CVE-2026-23059 scsi: qla2xxx: Sanitize payload size to prevent member overflow
CVE-2026-23058 can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak
CVE-2026-23057 vsock/virtio: Coalesce only linear skb
CVE-2026-23056 uacce: implement mremap in uacce_vm_ops to return -EPERM
CVE-2025-71199 iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver
CVE-2025-71198 iio: imu: st_lsm6dsx: fix iio_chan_spec for sensors without event detection
CVE-2026-23061 can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak

Showing top 20 of 79 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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