{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1b67772e4e3f16cd647b229cae95fc06d120be08"
            },
            {
              "fixed": "2135f661fae7160a7fc603cab43cbc7999e8bfce"
            },
            {
              "fixed": "d5f2f741a900123fbcb7c7c0a002b81306fbe242"
            },
            {
              "fixed": "915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62"
            },
            {
              "fixed": "2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93173.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks\n\n__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs.\nsecurity_bpf_prog_free() called from there fires bpf_prog_free in softirq;\nif a sleepable LSM prog is attached to that hook, might_fault() BUGs:\n\n  BUG: sleeping function called from invalid context\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038\n  preempt_count: 101, expected: 0\n  Call Trace:\n   \u003cIRQ\u003e\n   __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255\n   bpf_trampoline_6442549705+0x53/0xd7\n   security_bpf_prog_free+0xde/0x130 security/security.c:5465\n   __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365\n   rcu_do_batch kernel/rcu/tree.c:2617 [inline]\n   handle_softirqs+0x236/0x800 kernel/softirq.c:622\n   \u003c/IRQ\u003e\n\nThe call_rcu/call_rcu_tasks_trace split reflects the freed program's\nsleepability, not that of any attached observer.\n\nsecurity_bpf_prog_free() also frees prog-\u003eaux-\u003esecurity, which has to stay\nafter the grace period, so drop bpf_prog_free from sleepable_lsm_hooks\nrather than move the call. Non-sleepable observers still run there.",
  "id": "CVE-2026-93173",
  "modified": "2026-09-19T03:30:36.348904319Z",
  "published": "2026-09-17T16:12:03.229Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2135f661fae7160a7fc603cab43cbc7999e8bfce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5f2f741a900123fbcb7c7c0a002b81306fbe242"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93173.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93173"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks"
}