{"apiVersion":"1.0","identifier":"CVE-2026-80697","description":"In the Linux kernel, the following vulnerability has been resolved: erofs: ensure valid f_path for page cache sharing Previously, backing files for page cache sharing were set up with f_path left as NULL (only f_inode was valid). It worked, but a recent mincore fix relies on f_path.mnt and crashes (found by -erofs/028- on 7.2-rc4): BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 3 UID: 0 PID: 675528 Comm: fincore Not tainted 7.2.0-rc4-00002-g[]-dirty #1 PREEMPT(lazy) Hardware name: Red Hat KVM, BIOS 1.16.0-4.al8 04/01/2014 RIP: 0010:__do_sys_mincore+0xc0/0x2c0 ... Specify valid paths using valid disconnected dentries together with erofs_ishare_mnt instead of leaving f_path empty, so they are more like real backing files in a pseudo filesystem and standard backing_file_open() can be used directly.","publishedAt":"2026-08-28T08:16:55","lastModifiedAt":"2026-08-28T16:18:28","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80697","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80697","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80697","en":"https://www.redsauce.net/en/cves/CVE-2026-80697","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80697","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80697","de":"https://www.redsauce.net/de/cves/CVE-2026-80697","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80697","el":"https://www.redsauce.net/el/cves/CVE-2026-80697"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80697"}}