{"apiVersion":"1.0","identifier":"CVE-2026-80671","description":"In the Linux kernel, the following vulnerability has been resolved: perf sched: Fix register_pid() overflow, strcpy, and BUG_ON register_pid() has several issues when processing untrusted perf.data: 1. Integer overflow: (pid + 1) * sizeof(struct task_desc *) can wrap to a small value on 32-bit systems when pid is large (e.g. 0x40000000), causing realloc to return a tiny buffer followed by out-of-bounds writes in the initialization loop. 2. Heap buffer overflow: strcpy(task->comm, comm) copies the untrusted comm string into a fixed 20-byte COMM_LEN buffer with no length check. 3. BUG_ON on allocation failure: perf.data is untrusted input, so allocation failures should be handled gracefully rather than killing the process. 4. Realloc of sched->tasks assigned directly back, leaking the old pointer on failure; nr_tasks incremented before the realloc, leaving corrupted state on failure. Cap pid at PID_MAX_LIMIT (4194304, matching the kernel-s maximum on 64-bit), replace strcpy with strlcpy, guard against NULL comm, replace BUG_ON with NULL returns using safe realloc patterns, and add NULL checks in callers that dereference the result.","publishedAt":"2026-08-28T08:16:52","lastModifiedAt":"2026-08-28T08:16:52","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80671","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00183,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80671","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80671","en":"https://www.redsauce.net/en/cves/CVE-2026-80671","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80671","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80671","de":"https://www.redsauce.net/de/cves/CVE-2026-80671","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80671","el":"https://www.redsauce.net/el/cves/CVE-2026-80671"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80671"}}