{"schema":"threatline.record/2","record":{"id":"CVE-2026-98314","aliases":[],"summary":"ALSA: pcm: set timer->private_data before registering the PCM timer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: set timer->private_data before registering the PCM timer\n\nsnd_pcm_timer_init() calls snd_device_register() to link the new\nstruct snd_timer into the global timer list while it still carries\nhw.c_resolution = snd_pcm_timer_resolution (and hw.start/hw.stop),\nand only afterwards sets timer->private_data = substream.\n\nOnce the timer is on the list under register_mutex, a concurrent\nreader can already reach it through the same mutex and invoke these\ncallbacks. /proc/asound/timers does this via c_resolution(), and\nsnd_timer_open()+snd_timer_start() reach start()/stop() the same way.\nAll three dereference timer->private_data, which for this brief\nwindow is NULL, giving a NULL-pointer dereference:\n\n  substream = timer->private_data;\n  return substream->runtime ? ...   // substream is NULL\n\nMove the private_data/private_free assignment before\nsnd_device_register() so the timer is never visible on the list\nwithout its private_data set. On the snd_device_register() failure\npath, private_free() (snd_pcm_timer_free()) can now run, but it only\ndoes substream->timer = NULL, which is already NULL at that point\nsince substream->timer is set to the new timer just once, after a\nsuccessful registration -- so the failure path stays safe.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"27f167e117eca310661fbcbacb352ea08face067","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"555d168bd98daa46daccc68c908201388c834293","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8c869d5cf5affb20994bdbb60e7d46d65c91b55f","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"686c7a6af1eea8d2a919303e4c6bbec3de79dbdc","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e1eee8f16628f8b6bcae0a366fd6a2dd65e71edd","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"d63f5a9f8121fb43c798056d7dd34c58f47185d7","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0b349249d572633d7c8cdeb917623d1676a2b7c3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1e713f9bb2ac583521f06b0eb4e22440b1e3d078","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"27f167e117eca310661fbcbacb352ea08face067","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"555d168bd98daa46daccc68c908201388c834293","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8c869d5cf5affb20994bdbb60e7d46d65c91b55f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"686c7a6af1eea8d2a919303e4c6bbec3de79dbdc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0b349249d572633d7c8cdeb917623d1676a2b7c3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","source_modified_at":"2026-10-19T09:17:24.800Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"1e713f9bb2ac583521f06b0eb4e22440b1e3d078","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00184,"percentile":0.07615,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:46:09.965Z","modified_at":"2026-10-19T09:17:24.800Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98314","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:17:24.800Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98314","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/27f167e117eca310661fbcbacb352ea08face067"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/555d168bd98daa46daccc68c908201388c834293"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8c869d5cf5affb20994bdbb60e7d46d65c91b55f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/686c7a6af1eea8d2a919303e4c6bbec3de79dbdc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e1eee8f16628f8b6bcae0a366fd6a2dd65e71edd"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d63f5a9f8121fb43c798056d7dd34c58f47185d7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0b349249d572633d7c8cdeb917623d1676a2b7c3"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1e713f9bb2ac583521f06b0eb4e22440b1e3d078"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:17:24.800Z","content_hash":"f22773a42ab4adecc8fcb97eea7fe1edf7ffec8eecb9ce2fcbdf47a5ef8a156b"}}