{"cve":"CVE-2026-46090","nvd":{"published":"2026-05-27T14:17:30.547","modified":"2026-10-19T20:18:28.983","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: aloop: Fix peer runtime UAF during format-change stop\n\nloopback_check_format() may stop the capture side when playback starts\nwith parameters that no longer match a running capture stream. Commit\n826af7fa62e3 (\"ALSA: aloop: Fix racy access at PCM trigger\") moved\nthe peer lookup under cable->lock, but the actual snd_pcm_stop() still\nruns after dropping that lock.\n\nA concurrent close can clear the capture entry from cable->streams[] and\ndetach or free its runtime while the playback trigger path still holds a\nstale peer substream pointer.\n\nKeep a per-cable count of in-flight peer stops before dropping\ncable->lock, and make free_cable() wait for those stops before\ndetaching the runtime. This preserves the existing behavior while\nmaking the peer runtime lifetime explicit.","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","CWE-364"],"references":["https://git.kernel.org/stable/c/03f52a9c170431e8f10e156b9dc0dae80b3e9198","https://git.kernel.org/stable/c/345c24b2bcf0923dfae1ab41497351c68214ff76","https://git.kernel.org/stable/c/3727a3541788412c393eec236ad228d72efe19c7","https://git.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913","https://git.kernel.org/stable/c/83bd62fa9620ac98d5d694bde14c50f98c8e7189"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-46090","score":0.00104,"percentile":0.00994,"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."]}