{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3a08c2fd763450a927d1130de078d6f9e74944fb"
            },
            {
              "fixed": "8b0510cc3a4a000d4ed1a56cd96231f3d3ba94c5"
            },
            {
              "fixed": "440a2fdbb40608d55a7b11f2be53592a3785131d"
            },
            {
              "fixed": "89edbdfc5d0308cef57b71359331de5c4ddbf763"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.10.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74337.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NMI/tracepoint re-entry deadlock on lru locks\n\nNMI and tracepoint BPF programs can re-enter the per-CPU or global\nLRU lock that bpf_lru_pop_free()/push_free() already hold on the\nsame CPU, AA-deadlocking. Lockdep reports \"inconsistent\n{INITIAL USE} -\u003e {IN-NMI}\" on \u0026l-\u003elock (syzbot c69a0a2c816716f1e0d5)\nand \"possible recursive locking detected\" on \u0026loc_l-\u003elock (syzbot\n18b26edb69b2e19f3b33).\n\nPrior trylock and rqspinlock based fixes (see links) were nacked\nbecause compromised on reliability.\n\nThis patch converts every LRU lock site to rqspinlock_t and adds a\nrecovery path for some failure windows to avoid node leaks.\n\nFailure recovery:\n\n - *_pop_free top-level: return NULL; prealloc_lru_pop() already\n   treats that as no-free-element (-ENOMEM).\n\n - Cross-CPU steal: skip the victim's locked loc_l, try next CPU.\n\n - Post-steal local lock fail: publish stolen node to lockless\n   per-CPU free_llist; next pop on this CPU picks it up.\n\n - push_free fail: mark node pending_free=1. __local_list_flush(),\n   __local_list_pop_pending() reclaim the node from pending_list.\n   __bpf_lru_list_shrink_inactive() reclaims the node from inactive\n   list. Nodes from active list are reclaimed by __bpf_lru_list_shrink()\n   or after __bpf_lru_list_rotate_active() demotes it to the inactive.",
  "id": "CVE-2026-74337",
  "modified": "2026-08-16T03:31:15.913283540Z",
  "published": "2026-08-15T05:58:28.518Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/440a2fdbb40608d55a7b11f2be53592a3785131d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89edbdfc5d0308cef57b71359331de5c4ddbf763"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b0510cc3a4a000d4ed1a56cd96231f3d3ba94c5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74337.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74337"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf: Fix NMI/tracepoint re-entry deadlock on lru locks"
}