{"cve":"CVE-2026-43458","nvd":{"published":"2026-05-08T15:16:58.630","modified":"2026-06-17T10:49:38.410","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: caif: hold tty->link reference in ldisc_open and ser_release\n\nA reproducer triggers a KASAN slab-use-after-free in pty_write_room()\nwhen caif_serial's TX path calls tty_write_room(). The faulting access\nis on tty->link->port.\n\nHold an extra kref on tty->link for the lifetime of the caif_serial line\ndiscipline: get it in ldisc_open() and drop it in ser_release(), and\nalso drop it on the ldisc_open() error path.\n\nWith this change applied, the reproducer no longer triggers the UAF in\nmy testing.","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-416"],"references":["https://git.kernel.org/stable/c/23a3ac2e2262a291498567418227b99e1f3606b1","https://git.kernel.org/stable/c/27e43356d0defb9fc7fa25265219a3ffeb7b3e98","https://git.kernel.org/stable/c/288598d80a068a0e9281de35bcb4ce495f189e2a","https://git.kernel.org/stable/c/35b58d3bc716ebb9ebd10fe1cac8c1177242511c","https://git.kernel.org/stable/c/52135420e9f75853ea0c6cea7b736e3e98495f7d"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43458","score":0.00117,"percentile":0.01645,"date":"2026-11-01"},"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."]}