VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98769: Linux kernel · usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e, 9062d50e75c24dc7911be05c9b1719b3b256af15, 697cfe6e53b66cda196d6f8833b0ee97fefd0a8a +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c47d7b09891abb4f8b222317c89c7469bed8db3a, < da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e	Fixed in da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e
LinuxLinux	Affected ≥ c47d7b09891abb4f8b222317c89c7469bed8db3a, < 9062d50e75c24dc7911be05c9b1719b3b256af15	Fixed in 9062d50e75c24dc7911be05c9b1719b3b256af15
LinuxLinux	Affected ≥ c47d7b09891abb4f8b222317c89c7469bed8db3a, < 697cfe6e53b66cda196d6f8833b0ee97fefd0a8a	Fixed in 697cfe6e53b66cda196d6f8833b0ee97fefd0a8a
LinuxLinux	Affected ≥ c47d7b09891abb4f8b222317c89c7469bed8db3a, < 36f3f009049bc91e14dc856007932473318d12f8	Fixed in 36f3f009049bc91e14dc856007932473318d12f8
LinuxLinux	Affected ≥ c47d7b09891abb4f8b222317c89c7469bed8db3a, < 8c611876c002d712ae5f246af5188432c708f79d	Fixed in 8c611876c002d712ae5f246af5188432c708f79d
LinuxLinux	Affected =2.6.31	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd generic_set_cmd() and generic_get_cmd() use the low nibble of ctrl->bRequest as an index into con->data[]: u8 cmd = (ctrl->bRequest & 0x0F); /* 0 .. 15 */ ... con->data[cmd] = value; /* OOB when cmd >= 5 */ struct usb_audio_control (include/linux/usb/audio.h) declares data as a 5-element array, so indices 5 through 15 write (or read) up to 44 bytes past the end of the array on the heap. A malicious USB host can craft a class-specific SET_CUR / GET_CUR request with an arbitrary bRequest value, triggering the out-of-bounds access from an IRQ completion handler with no further preconditions. Add an ARRAY_SIZE() guard to both functions.

References

Community reviews

Loading reviews…