{"cve":"CVE-2025-39819","nvd":{"published":"2025-09-16T13:15:58.260","modified":"2026-10-19T21:10:00.160","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/smb: Fix inconsistent refcnt update\n\nA possible inconsistent update of refcount was identified in `smb2_compound_op`.\nSuch inconsistent update could lead to possible resource leaks.\n\nWhy it is a possible bug:\n1. In the comment section of the function, it clearly states that the\nreference to `cfile` should be dropped after calling this function.\n2. Every control flow path would check and drop the reference to\n`cfile`, except the patched one.\n3. Existing callers would not handle refcount update of `cfile` if\n-ENOMEM is returned.\n\nTo fix the bug, an extra goto label \"out\" is added, to make sure that the\ncleanup logic would always be respected. As the problem is caused by the\nallocation failure of `vars`, the cleanup logic between label \"finished\"\nand \"out\" can be safely ignored. According to the definition of function\n`is_replayable_error`, the error code of \"-ENOMEM\" is not recoverable.\nTherefore, the replay logic also gets ignored.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/3fc11ff13fbc2749871d6ac2141685cf54699997","https://git.kernel.org/stable/c/4191ea1f0bb3e27d65c5dcde7bd00e709ec67141","https://git.kernel.org/stable/c/4735f5991f51468b85affb8366b7067248457a71","https://git.kernel.org/stable/c/ab529e6ca1f67bcf31f3ea80c72bffde2e9e053e","https://git.kernel.org/stable/c/cc82c6dff548f0066a51a6e577c7454e7d26a968"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-39819","score":0.0015,"percentile":0.04117,"date":"2026-10-25"},"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."]}