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CVE-2026-100079— usb: typec: ucsi: unregister debugfs entries on teardown

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.

在 Linux 内核中，已修复以下漏洞： usb: typec: ucsi: 在卸载时注销 debugfs 条目 会为每个实例创建对应的 debugfs 条目，但在 中，这些条目并未被移除，直到调用 时才被清理。 像 这样的驱动，在 remoteproc 重启过程中会反复注销并重新注册同一个 UCSI 实例，此时会尝试创建一个已经存在的 debugfs 目录，并记录如下日志： debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi' 本修复将注销 debugfs 条

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.16% · P4

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux df0383ffad64dc09954a60873c1e202b47f08d90< fb7393519908befdc094be4ea913f582adbf2f7c affected
df0383ffad64dc09954a60873c1e202b47f08d90< 7177c215e69658adbd2f2fc5b72e14be9208d2ba affected
df0383ffad64dc09954a60873c1e202b47f08d90< 1f44d001620fd3caa30619a9bc73e9d15555408b affected
df0383ffad64dc09954a60873c1e202b47f08d90< 62efee351566321ad72a4abaf6eb7d972590585d affected
df0383ffad64dc09954a60873c1e202b47f08d90< eed73a65ab609b79d53de88cccc34b36dfe753c4 affected
6.6 affected
< 6.6 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-100079

Vulnerability Information
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Vulnerability Title
usb: typec: ucsi: unregister debugfs entries on teardown
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: unregister debugfs entries on teardown ucsi_register() creates per-instance debugfs entries, but ucsi_unregister() keeps them around until ucsi_destroy(). Drivers like ucsi_glink that unregister/register the same UCSI instance across remoteproc restart then try to create an already existing debugfs directory and log: debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi' Unregister debugfs entries as part of ucsi_unregister(), and clear ucsi->debugfs after freeing it so repeated unregister paths remain safe.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux df0383ffad64dc09954a60873c1e202b47f08d90 ~ fb7393519908befdc094be4ea913f582adbf2f7c -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-100079

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III. Intelligence Information for CVE-2026-100079

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Patches & Fixes for CVE-2026-100079 (4)

Other References for CVE-2026-100079 (1)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-98122 7.8 HIGH vxlan: mdb: Fix use-after-free in vxlan_mdb_remote_src_del()
CVE-2026-97575 7.8 HIGH media: v4l2-ctrls: validate AV1 tile counts
CVE-2026-97576 7.8 HIGH media: v4l2-ctrls: validate HEVC tile counts
CVE-2026-97941 7.8 HIGH mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events
CVE-2026-98116 7.8 HIGH ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF
CVE-2026-97580 7.8 HIGH media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
CVE-2026-97940 7.8 HIGH ipv6: fix fib6 walker UAF on seq stop

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-100079

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