{"cve":"CVE-2026-23194","nvd":{"published":"2026-02-14T17:15:57.233","modified":"2026-06-17T10:21:04.530","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust_binder: correctly handle FDA objects of length zero\n\nFix a bug where an empty FDA (fd array) object with 0 fds would cause an\nout-of-bounds error. The previous implementation used `skip == 0` to\nmean \"this is a pointer fixup\", but 0 is also the correct skip length\nfor an empty FDA. If the FDA is at the end of the buffer, then this\nresults in an attempt to write 8-bytes out of bounds. This is caught and\nresults in an EINVAL error being returned to userspace.\n\nThe pattern of using `skip == 0` as a special value originates from the\nC-implementation of Binder. As part of fixing this bug, this pattern is\nreplaced with a Rust enum.\n\nI considered the alternate option of not pushing a fixup when the length\nis zero, but I think it's cleaner to just get rid of the zero-is-special\nstuff.\n\nThe root cause of this bug was diagnosed by Gemini CLI on first try. I\nused the following prompt:\n\n> There appears to be a bug in @drivers/android/binder/thread.rs where\n> the Fixups oob bug is triggered with 316 304 316 324. This implies\n> that we somehow ended up with a fixup where buffer A has a pointer to\n> buffer B, but the pointer is located at an index in buffer A that is\n> out of bounds. Please investigate the code to find the bug. You may\n> compare with @drivers/android/binder.c that implements this correctly.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/598fe3ff32e43918ed8a062f55432b3d23e6340c","https://git.kernel.org/stable/c/8f589c9c3be539d6c2b393c82940c3783831082f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:23:35.260773158+00:00"},"epss":{"cve":"CVE-2026-23194","score":0.00131,"percentile":0.02705,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}