{"cve":"CVE-2026-80697","nvd":{"published":"2026-08-28T08:16:55.187","modified":"2026-08-28T16:18:28.657","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: ensure valid f_path for page cache sharing\n\nPreviously, backing files for page cache sharing were set up with\nf_path left as NULL (only f_inode was valid).  It worked, but a recent\nmincore fix relies on f_path.mnt and crashes (found by \"erofs/028\" on\n7.2-rc4):\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP PTI\n CPU: 3 UID: 0 PID: 675528 Comm: fincore Not tainted 7.2.0-rc4-00002-g[]-dirty #1 PREEMPT(lazy)\n Hardware name: Red Hat KVM, BIOS 1.16.0-4.al8 04/01/2014\n RIP: 0010:__do_sys_mincore+0xc0/0x2c0\n ...\n\nSpecify valid paths using valid disconnected dentries together with\nerofs_ishare_mnt instead of leaving f_path empty, so they are more\nlike real backing files in a pseudo filesystem and standard\nbacking_file_open() can be used directly.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/3879657c4ffd81b9a42cf575fc6cb60201032587","https://git.kernel.org/stable/c/96b2dbbe58a1ea5df8d29c2fe24b5f04715f4443"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80697","score":0.00198,"percentile":0.09555,"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."]}