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CVE-2025-38530— comedi: pcl812: Fix bit shift out of bounds

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comedi pcl812位偏移越界，可能导致用户空间漏洞。

AI Predicted 4.4 Difficulty: Easy EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 374d9b3eb4b08407997ef1fce96119d31e0c0bc4 affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 0489c30d080f07cc7f09d04de723d8c2ccdb61ef affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 29ef03e5b84431171d6b77b822985b54bc44b793 affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 5bfa301e1e59a9b1a7b62a800b54852337c97416 affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 7e470d8efd10725b189ca8951973a8425932398a affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< a27e27eee313fe1c450b6af1e80e64412546cab4 affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< 16c173abee315953fd17a279352fec4a1faee862 affected
fcdb427bc7cf5e9e5d7280cf09c08dec49b49432< b14b076ce593f72585412fc7fd3747e03a5e3632 affected
… +10 more rows
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I. Basic Information for CVE-2025-38530

Vulnerability Information
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Vulnerability Title
comedi: pcl812: Fix bit shift out of bounds
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: comedi: pcl812: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << it->options[1]) & board->irq_bits) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.
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comedi pcl812位偏移越界，可能导致用户空间漏洞。
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 fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 ~ 374d9b3eb4b08407997ef1fce96119d31e0c0bc4 -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2025-38530

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III. Intelligence Information for CVE-2025-38530

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Patches & Fixes for CVE-2025-38530 (5)

Same Patch Batch · Linux · 2025-08-16 · 59 CVEs total

CVE-2025-38527 9.8 CRITICAL smb: client: fix use-after-free in cifs_oplock_break
CVE-2025-38533 9.8 CRITICAL net: libwx: fix the using of Rx buffer DMA
CVE-2025-38552 9.4 CRITICAL mptcp: plug races between subflow fail and subflow creation
CVE-2023-3867 9.1 CRITICAL ksmbd: fix out of bounds read in smb2_sess_setup
CVE-2023-4515 9.1 CRITICAL ksmbd: validate command request size
CVE-2023-32249 9.1 CRITICAL ksmbd: not allow guest user on multichannel
CVE-2025-38512 8.8 HIGH wifi: prevent A-MSDU attacks in mesh networks
CVE-2025-38511 8.8 HIGH drm/xe/pf: Clear all LMTT pages on alloc
CVE-2023-4130 8.1 HIGH ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()
CVE-2023-3865 8.1 HIGH ksmbd: fix out-of-bound read in smb2_write
CVE-2025-38539 7.8 HIGH tracing: Add down_write(trace_event_sem) when adding trace event
CVE-2025-38532 7.8 HIGH net: libwx: properly reset Rx ring descriptor
CVE-2025-38542 7.8 HIGH net: appletalk: Fix device refcount leak in atrtr_create()
CVE-2025-38536 7.8 HIGH net: airoha: fix potential use-after-free in airoha_npu_get()
CVE-2025-38502 7.8 HIGH bpf: Fix oob access in cgroup local storage
CVE-2025-38550 7.8 HIGH ipv6: mcast: Delay put pmc->idev in mld_del_delrec()
CVE-2025-38514 7.5 HIGH rxrpc: Fix oops due to non-existence of prealloc backlog struct
CVE-2025-38501 7.5 HIGH ksmbd: limit repeated connections from clients with the same IP
CVE-2025-38524 7.5 HIGH rxrpc: Fix recv-recv race of completed call
CVE-2025-38526 7.5 HIGH ice: add NULL check in eswitch lag check

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38530

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