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CVE-2026-89470— power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于cros_usbpd-charger驱动探测时未限制嵌入式控制器返回的端口计数，恶意嵌入式控制器可返回最高255的不准确端口计数，导致越界写入和内存损坏。

CVSS 8.4 · High EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1206

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3af15cfacd1eef7f223802d49a88cae23c509183< e951b65ef1699439079b723ca5c72cbe44771647 affected
3af15cfacd1eef7f223802d49a88cae23c509183< 3ce9218639ff62d011eb8aca0943aa670a654c7b affected
3af15cfacd1eef7f223802d49a88cae23c509183< dce1750ddbd3380b1f6090dda2b07d2ebea2261d affected
3af15cfacd1eef7f223802d49a88cae23c509183< 3262977a05b23d1be9fc86727a2b490ec997543e affected
3af15cfacd1eef7f223802d49a88cae23c509183< fd5f289cca04ad869b34fc9ccb647670bfdb60ac affected
3af15cfacd1eef7f223802d49a88cae23c509183< 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701 affected
3af15cfacd1eef7f223802d49a88cae23c509183< 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60 affected
3af15cfacd1eef7f223802d49a88cae23c509183< 657cd3a42e937276262c0a8ae6b01a87004309de affected
… +10 more rows
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I. Basic Information for CVE-2026-89470

Vulnerability Information
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Vulnerability Title
power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS Currently the cros_usbpd-charger driver probe iterates based on raw charger port count returned by the embedded controller. The only check is against the number of USB PD ports which the embedded controller also defines. A malicious embedded controller could return an inaccurate port count (up to 255) resulting in an out of bounds write and subsequent memory corruption. Update helper functions in cros_usbpd-charger to limit port counts to EC_USB_PD_MAX_PORTS.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于cros_usbpd-charger驱动探测时未限制嵌入式控制器返回的端口计数，恶意嵌入式控制器可返回最高255的不准确端口计数，导致越界写入和内存损坏。
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 3af15cfacd1eef7f223802d49a88cae23c509183 ~ e951b65ef1699439079b723ca5c72cbe44771647 -
Linux Linux 4.20 -

II. Public POCs for CVE-2026-89470

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III. Intelligence Information for CVE-2026-89470

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Patches & Fixes for CVE-2026-89470 (8)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89470

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