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.

ubuntu_linux USN-8888-1: Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-80671)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
362907	Debian dla-4817 : ata-modules-6.12.107+deb12-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
351155	Debian dsa-6528 : ata-modules-6.12.111+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
341880	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-2071)	Nessus	Amazon Linux Local Security Checks	Local	high
341275	Linux Distros Unpatched Vulnerability : CVE-2026-80671	Nessus	Misc.	Local	critical

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