{"apiVersion":"1.0","identifier":"CVE-2026-74631","description":"In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via the pipe buffer callback. The old post-splice accounting also derives the number of queued VM pages from an offset mutated while building the descriptor, and a multi-page splice pairs one sock_hold() with multiple sock_put() calls. Take the page and socket references for every candidate entry before splice_to_pipe(), and drop the matching private state, page reference, and socket reference from smc_rx_spd_release() for entries that never get queued. This fixes a refcount imbalance that can underflow page refcounts and trigger a use-after-free.","publishedAt":"2026-08-22T16:16:36","lastModifiedAt":"2026-08-25T06:18:42","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74631","cvssScore":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00138,"riskScore":0.85,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74631","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74631","en":"https://www.redsauce.net/en/cves/CVE-2026-74631","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74631","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74631","de":"https://www.redsauce.net/de/cves/CVE-2026-74631","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74631","el":"https://www.redsauce.net/el/cves/CVE-2026-74631"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74631"}}