{"apiVersion":"1.0","identifier":"CVE-2026-80626","description":"In the Linux kernel, the following vulnerability has been resolved: powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the -out:- label, but only calls the matching get_cpu_var() after the -i < 0- early-return check. When event->hw.idx is negative the function jumps to -out:- without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count. On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a -scheduling while atomic- BUG. Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the -out:- label only handles perf_pmu_enable.","publishedAt":"2026-08-28T08:16:46","lastModifiedAt":"2026-08-28T08:16:46","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80626","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00176,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80626","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80626","en":"https://www.redsauce.net/en/cves/CVE-2026-80626","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80626","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80626","de":"https://www.redsauce.net/de/cves/CVE-2026-80626","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80626","el":"https://www.redsauce.net/el/cves/CVE-2026-80626"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80626"}}