CVE-2026-90023usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from fe5a6c48fd954489f51aab151d5dad9254c76419 before 51cc9af4f2d3f0b765266aced66b9b532b423b13; from fe5a6c48fd954489f51aab151d5dad9254c76419 before 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957; from fe5a6c48fd954489f51aab151d5dad9254c76419 before b9b5b5df5b8dd3c1572ed267200276a44cc67d8e; from fe5a6c48fd954489f51aab151d5dad9254c76419 before 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc | CNA record |
References
- https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13
- https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957
- https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e
- https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.