GHSA-HX5J-PHV4-M97W
Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-30 15:34In the Linux kernel, the following vulnerability has been resolved:
perf: Fix race between perf_event_exit_task() and perf_pending_task()
A race condition exists between perf_event_exit_task() and perf_pending_task() during begin_new_exec().
During begin_new_exec(), perf_event_exit_task() may be called, and the PF_EXITING flag is not set on task. So perf_sigtrap() continues to execute and triggers WARN_ON_ONCE(event->ctx->task != current).
Since both task exit and exec paths can call perf_event_exit_task() which sets ctx->task to TASK_TOMBSTONE, fix this by explicitly checking if event->ctx->task equals TASK_TOMBSTONE and dropping the redundant PF_EXITING check.
{
"affected": [],
"aliases": [
"CVE-2026-98790"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:32Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix race between perf_event_exit_task() and perf_pending_task()\n\nA race condition exists between perf_event_exit_task() and\nperf_pending_task() during begin_new_exec().\n\nDuring begin_new_exec(), perf_event_exit_task() may be called, and the\nPF_EXITING flag is not set on task. So perf_sigtrap() continues to execute\nand triggers WARN_ON_ONCE(event-\u003ectx-\u003etask != current).\n\nSince both task exit and exec paths can call perf_event_exit_task() which\nsets ctx-\u003etask to TASK_TOMBSTONE, fix this by explicitly checking if\nevent-\u003ectx-\u003etask equals TASK_TOMBSTONE and dropping the redundant\nPF_EXITING check.",
"id": "GHSA-hx5j-phv4-m97w",
"modified": "2026-10-30T15:34:03Z",
"published": "2026-10-18T18:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98790"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/524063fea29f8a841e49927ea7a8085194ad3ec2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/655acfa713bce9ae9c81a654459890c2f58cb4e8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/672b8a9ce8f51b991481dfde26fba5cc4340a91a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6e454fbe3e646d119ab75e907035950e0e857c09"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/81e61e3f8befa1bae3ec8e779d8ada5e5e362c21"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8a6fe5601fa2d2c0fbfb3e531a1063f73c1eae3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ffb684f2aa141eeb0caa6308422e7e05d1ded7c4"
}
],
"schema_version": "1.4.0",
"severity": []
}
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