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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-142691 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-143041 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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
370691	Unity Linux 20.1020e / 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-142691)	Nessus	Unity Linux Local Security Checks	Local	critical
370585	Unity Linux 20.1070a Security Update: kernel (UTSA-2026-143041)	Nessus	Unity Linux Local Security Checks	Local	critical
366919	Debian dla-4841 : ata-modules-6.1.0-53-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
366741	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2026-135)	Nessus	Amazon Linux Local Security Checks	Local	medium
365768	Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365767	Ubuntu 26.04 LTS : Linux kernel vulnerabilities (USN-8887-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365463	Ubuntu 26.04 LTS : Linux kernel (OEM) vulnerabilities (USN-8889-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365279	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-3196)	Nessus	Amazon Linux Local Security Checks	Local	medium
365220	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-3197)	Nessus	Amazon Linux Local Security Checks	Local	medium
365194	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2026-117)	Nessus	Amazon Linux Local Security Checks	Local	medium
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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