usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers() Previously fsg_num_buffers_validate() was removed as it was not necessary due to Kconfig setting the limits for n from 2 to 256 with default as 2. However, setting the page content in such a way that kstrtou8() reflects n value as either 0 or 1 bypasses these restrictions leading to a null pointer dereference if n is 0. Fix this by adding a check for n < 2 and returning -EINVAL if n is either 0 or 1 consistent with Kconfig logic.
CVE-2026-90023
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90023
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "fe5a6c48fd954489f51aab151d5dad9254c76419",
"lessThan": "f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf",
"versionType": "git"
},
{
"status": "affected",
"version": "fe5a6c48fd954489f51aab151d5dad9254c76419",
"lessThan": "51cc9af4f2d3f0b765266aced66b9b532b423b13",
"versionType": "git"
},
{
"status": "affected",
"version": "fe5a6c48fd954489f51aab151d5dad9254c76419",
"lessThan": "9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957",
"versionType": "git"
},
{
"status": "affected",
"version": "fe5a6c48fd954489f51aab151d5dad9254c76419",
"lessThan": "b9b5b5df5b8dd3c1572ed267200276a44cc67d8e",
"versionType": "git"
},
{
"status": "affected",
"version": "fe5a6c48fd954489f51aab151d5dad9254c76419",
"lessThan": "2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_mass_storage.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_mass_storage.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90023
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48582 · Revision 1
- Added to Heist Feed
- Publisher date