{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80671", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.782Z", "datePublished": "2026-08-28T06:49:11.744Z", "dateUpdated": "2026-08-28T06:49:11.744Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:49:11.744Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf sched: Fix register_pid() overflow, strcpy, and BUG_ON\n\nregister_pid() has several issues when processing untrusted perf.data:\n\n1. Integer overflow: (pid + 1) * sizeof(struct task_desc *) can wrap\n to a small value on 32-bit systems when pid is large (e.g.\n 0x40000000), causing realloc to return a tiny buffer followed by\n out-of-bounds writes in the initialization loop.\n\n2. Heap buffer overflow: strcpy(task->comm, comm) copies the\n untrusted comm string into a fixed 20-byte COMM_LEN buffer with\n no length check.\n\n3. BUG_ON on allocation failure: perf.data is untrusted input, so\n allocation failures should be handled gracefully rather than\n killing the process.\n\n4. Realloc of sched->tasks assigned directly back, leaking the old\n pointer on failure; nr_tasks incremented before the realloc,\n leaving corrupted state on failure.\n\nCap pid at PID_MAX_LIMIT (4194304, matching the kernel's maximum\non 64-bit), replace strcpy with strlcpy, guard against NULL comm,\nreplace BUG_ON with NULL returns using safe realloc patterns, and\nadd NULL checks in callers that dereference the result."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/perf/builtin-sched.c"], "versions": [{"version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "lessThan": "652cea73b7b7b7c622a2be670e44e3c499c6d49f", "status": "affected", "versionType": "git"}, {"version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "lessThan": "5ea1dcc9418c4e06ce29ed5170596f497ba86872", "status": "affected", "versionType": "git"}, {"version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "lessThan": "5949d339f5ec98752d56dcd4e36f619a59d513a5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["tools/perf/builtin-sched.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/652cea73b7b7b7c622a2be670e44e3c499c6d49f"}, {"url": "https://git.kernel.org/stable/c/5ea1dcc9418c4e06ce29ed5170596f497ba86872"}, {"url": "https://git.kernel.org/stable/c/5949d339f5ec98752d56dcd4e36f619a59d513a5"}], "title": "perf sched: Fix register_pid() overflow, strcpy, and BUG_ON", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["tools/perf/builtin-sched.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "652cea73b7b7b7c622a2be670e44e3c499c6d49f", "status": "affected", "version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "versionType": "git"}, {"lessThan": "5ea1dcc9418c4e06ce29ed5170596f497ba86872", "status": "affected", "version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "versionType": "git"}, {"lessThan": "5949d339f5ec98752d56dcd4e36f619a59d513a5", "status": "affected", "version": "ec156764d424dd67283c2cd5e9f6f1b8388364ac", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["tools/perf/builtin-sched.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"lessThan": "2.6.32", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf sched: Fix register_pid() overflow, strcpy, and BUG_ON\n\nregister_pid() has several issues when processing untrusted perf.data:\n\n1. Integer overflow: (pid + 1) * sizeof(struct task_desc *) can wrap\n to a small value on 32-bit systems when pid is large (e.g.\n 0x40000000), causing realloc to return a tiny buffer followed by\n out-of-bounds writes in the initialization loop.\n\n2. Heap buffer overflow: strcpy(task->comm, comm) copies the\n untrusted comm string into a fixed 20-byte COMM_LEN buffer with\n no length check.\n\n3. BUG_ON on allocation failure: perf.data is untrusted input, so\n allocation failures should be handled gracefully rather than\n killing the process.\n\n4. Realloc of sched->tasks assigned directly back, leaking the old\n pointer on failure; nr_tasks incremented before the realloc,\n leaving corrupted state on failure.\n\nCap pid at PID_MAX_LIMIT (4194304, matching the kernel's maximum\non 64-bit), replace strcpy with strlcpy, guard against NULL comm,\nreplace BUG_ON with NULL returns using safe realloc patterns, and\nadd NULL checks in callers that dereference the result."}], "id": "CVE-2026-80671", "lastModified": "2026-08-28T08:16:52.410", "metrics": {}, "published": "2026-08-28T08:16:52.410", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5949d339f5ec98752d56dcd4e36f619a59d513a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ea1dcc9418c4e06ce29ed5170596f497ba86872"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/652cea73b7b7b7c622a2be670e44e3c499c6d49f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}