usb: gadget: configfs: Fix OOB read on empty string write
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: configfs: Fix OOB read on empty string write
When writing an empty string to either 'qw_sign' or 'landingPage'
sysfs attributes, the store functions attempt to access page[l - 1]
before validating that the length 'l' is greater than zero.
This patch fixes the vulnerability by adding a check at the beginning
of os_desc_qw_sign_store() and webusb_landingPage_store() to handle
the zero-length input case gracefully by returning immediately.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/15a87206879951712915c03c8952a73d6a74721ehttps://git.kernel.org/stable/c/22b7897c289cc25d99c603f5144096142a30d897https://git.kernel.org/stable/c/2798111f8e504ac747cce911226135d50b8de468https://git.kernel.org/stable/c/3014168731b7930300aab656085af784edc861f6https://git.kernel.org/stable/c/58bdd5160184645771553ea732da5c2887fc9bd1https://git.kernel.org/stable/c/783ea37b237a9b524f1e5ca018ea17d772ee0ea0https://git.kernel.org/stable/c/78b41148cfea2a3f04d87adf3a71b21735820a37https://git.kernel.org/stable/c/d68b7c8fefbaeae8f065b84e40cf64baf4cc0c76https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlhttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.html