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CVE-2026-93120— usb: gadget: configfs: fix out-of-bounds read of qw_sign

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，以下漏洞已得到修复： usb: gadget: configfs: 修复 qw_sign 的越界读取 函数在调用 时，将 作为输入长度传入。然而，该参数本意是计算 UTF-16 码元（code unit）的数量，而 的值为 14，实际上是 数组的字节大小（即 14 字节，对应 7 个 UTF-16 码元）。 由于 数组实际只能容纳 （即 7 个码元），当存储的签名恰好填满数组且没有 NUL 终止符时，转换过程会越过 数组末尾，继续读取后续 7 个码元（14 字节）的数据——这些数据实际来自

AI Predicted 4.4 Difficulty: Moderate EPSS 0.21% · P10

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 76180d716f91f035d9c8639497cf5459b44e1a51< b895dbed8ac9e12a5ffa1a2165575a8469f8340d affected
76180d716f91f035d9c8639497cf5459b44e1a51< 9b45125501aad2dff7730970461b455b0e0658ee affected
76180d716f91f035d9c8639497cf5459b44e1a51< f6da500b0f8106882598b6dec87fe37d653946cf affected
76180d716f91f035d9c8639497cf5459b44e1a51< a28c486434634f6d1e120711d2b09f3eddea6c98 affected
76180d716f91f035d9c8639497cf5459b44e1a51< 7e94cb967778e074411940db4db97f22ed77560c affected
76180d716f91f035d9c8639497cf5459b44e1a51< afbf39c0f2297c6abef6d670a82a2079b0836191 affected
76180d716f91f035d9c8639497cf5459b44e1a51< 36315a330e067f7773196940552feacb1debbef1 affected
76180d716f91f035d9c8639497cf5459b44e1a51< f63edb54d8f738f9c21e2068c777ae1c097df6b7 affected
… +10 more rows
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I. Basic Information for CVE-2026-93120

Vulnerability Information
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Vulnerability Title
usb: gadget: configfs: fix out-of-bounds read of qw_sign
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: configfs: fix out-of-bounds read of qw_sign os_desc_qw_sign_show() passes OS_STRING_QW_SIGN_LEN as the input length to utf16s_to_utf8s(), but that argument counts UTF-16 code units while OS_STRING_QW_SIGN_LEN (14) is the byte size of qw_sign[]. The array holds only OS_STRING_QW_SIGN_LEN / 2 (7) code units, so the conversion reads up to 7 units (14 bytes) past the end of qw_sign[] into the following members of struct gadget_info when the stored signature fills the array without a NUL terminator, exposing those bytes through the configfs attribute. The store path halves the count for its input bound but passes the full byte count as the utf8s_to_utf16s() output limit; use the destination code-unit count in both directions.
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 76180d716f91f035d9c8639497cf5459b44e1a51 ~ b895dbed8ac9e12a5ffa1a2165575a8469f8340d -
Linux Linux 4.13 -

II. Public POCs for CVE-2026-93120

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III. Intelligence Information for CVE-2026-93120

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Patches & Fixes for CVE-2026-93120 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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