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CVE-2026-64087— hwmon: (pmbus/adm1266) reject implausible blackbox record_count

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基金会开源的一款操作系统内核。 Linux存在安全漏洞，该漏洞源于pmbus/adm1266驱动程序中blackbox record_count验证不当，可能导致设备报告超过32的记录数时发生缓冲区越界。以下版本受到影响：5.10版本。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 15609d1893020436e1e8ccfd9ded774a96dd17a2< adcb163ad7cacca317872fc62bd8885e842e45e3 affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< c2c56092710fe8a893b67b5a3d7e62808d02d84d affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< 5469e1e7c411acc15fdd8262c99c3ebd9defd594 affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< f85c81e93dbd6915970bd5f3bffcf62633c4c54c affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< 0e791cd0140fb136083565aadfbe0f705aa260d0 affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< 75c862adf3d3caab4f49bb3530723c215376e37c affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< 231db52a5b64d0a9769e298dadc148e1f79b26a6 affected
15609d1893020436e1e8ccfd9ded774a96dd17a2< 4afca954622d672ea65ed961bed01cf91caa034e affected
… +10 more rows
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I. Basic Information for CVE-2026-64087

Vulnerability Information
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Vulnerability Title
hwmon: (pmbus/adm1266) reject implausible blackbox record_count
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject implausible blackbox record_count adm1266_nvmem_read_blackbox() loops over a record_count that comes straight from byte 3 of the BLACKBOX_INFO response. The destination buffer is data->dev_mem, sized for the nvmem cell's declared 2048 bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64). A device that reports a record_count greater than 32 -- whether due to firmware bugs, bus corruption, or a non-responsive slave returning 0xff -- would walk read_buff past the end of the dev_mem allocation on the trailing iterations. Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here) before entering the loop and return -EIO on any larger value, so a malformed BLACKBOX_INFO response cannot drive the loop out of bounds.
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基金会开源的一款操作系统内核。 Linux存在安全漏洞，该漏洞源于pmbus/adm1266驱动程序中blackbox record_count验证不当，可能导致设备报告超过32的记录数时发生缓冲区越界。以下版本受到影响：5.10版本。
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 15609d1893020436e1e8ccfd9ded774a96dd17a2 ~ adcb163ad7cacca317872fc62bd8885e842e45e3 -
Linux Linux 5.10 -

II. Public POCs for CVE-2026-64087

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III. Intelligence Information for CVE-2026-64087

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Patches & Fixes for CVE-2026-64087 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-63887 9.8 CRITICAL scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
CVE-2026-63994 9.8 CRITICAL tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-64125 9.8 CRITICAL net: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-64091 9.8 CRITICAL batman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-64132 9.8 CRITICAL ipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-64136 9.8 CRITICAL smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64087

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