{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "15dd3a9488557d3e6ebcecacab79f4e56b69ab54"
            },
            {
              "fixed": "8bbf4405050bc4f98be68082a20efa081ea8ad9b"
            },
            {
              "fixed": "ada54c2ba652348c590d1ace6a2f4ff77cbbf809"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.0"
            },
            {
              "fixed": "7.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74749.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrseq: Prevent hard lockup on granted time slice extension\n\n__exit_to_user_mode_loop() invokes rseq_grant_timeslice_extension() with\ninterrupts enabled. If the extension is granted it invokes\nhrtimer_rearm_deferred_tif() to ensure that a pending deferred hrtimer\nrearm is handled before exiting to user space.\n\nThough this invokes __hrtimer_rearm_deferred() which expects to be invoked\nwith interrupts disabled as it takes hrtimer_cpu_base::lock with\nraw_spin_lock(). That's a livelock waiting to happen and caught by lockdep:\n\n    WARNING: ./include/linux/hrtimer_rearm.h:17 at irqentry_exit, CPU#1: slice_test\n    WARNING: inconsistent lock state\n    inconsistent {IN-HARDIRQ-W} -\u003e {HARDIRQ-ON-W} usage.\n\nPrevent this by disabling interrupts around the invocation of\nhrtimer_rearm_deferred_tif() in rseq_grant_timeslice_extension().\n\n[ tglx: Massaged change log ]",
  "id": "CVE-2026-74749",
  "modified": "2026-08-28T11:30:50.284417771Z",
  "published": "2026-08-26T14:36:57.763Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bbf4405050bc4f98be68082a20efa081ea8ad9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ada54c2ba652348c590d1ace6a2f4ff77cbbf809"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74749.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74749"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "rseq: Prevent hard lockup on granted time slice extension"
}