{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3a58f13a881ed351198ffab4cf9953cf19d2ab3a"
            },
            {
              "fixed": "8babb271403378ba6836f6c8599c5313d0e2355d"
            },
            {
              "fixed": "8519e6883a942e510f33a0e634e27bcc3a844a40"
            },
            {
              "fixed": "6ce948fa54599f369ff7fe8b793a6aae4b0762b2"
            },
            {
              "fixed": "026bbaeeab9e04534ee58882b6447300629b42f6"
            },
            {
              "fixed": "6a877ececd6daa002a9a0002cd0fbca6592a9244"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2a6efabed754c9dcf27e6def71317b374f58a852"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.17.7"
            },
            {
              "fixed": "5.18"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.77"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.17"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23419.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: Fix circular locking dependency in rds_tcp_tune\n\nsyzbot reported a circular locking dependency in rds_tcp_tune() where\nsk_net_refcnt_upgrade() is called while holding the socket lock:\n\n======================================================\nWARNING: possible circular locking dependency detected\n======================================================\nkworker/u10:8/15040 is trying to acquire lock:\nffffffff8e9aaf80 (fs_reclaim){+.+.}-{0:0},\nat: __kmalloc_cache_noprof+0x4b/0x6f0\n\nbut task is already holding lock:\nffff88805a3c1ce0 (k-sk_lock-AF_INET6){+.+.}-{0:0},\nat: rds_tcp_tune+0xd7/0x930\n\nThe issue occurs because sk_net_refcnt_upgrade() performs memory\nallocation (via get_net_track() -\u003e ref_tracker_alloc()) while the\nsocket lock is held, creating a circular dependency with fs_reclaim.\n\nFix this by moving sk_net_refcnt_upgrade() outside the socket lock\ncritical section. This is safe because the fields modified by the\nsk_net_refcnt_upgrade() call (sk_net_refcnt, ns_tracker) are not\naccessed by any concurrent code path at this point.\n\nv2:\n  - Corrected fixes tag\n  - check patch line wrap nits\n  - ai commentary nits",
  "id": "CVE-2026-23419",
  "modified": "2026-07-15T01:48:58.429743085Z",
  "published": "2026-04-03T13:24:23.958Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/026bbaeeab9e04534ee58882b6447300629b42f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a877ececd6daa002a9a0002cd0fbca6592a9244"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ce948fa54599f369ff7fe8b793a6aae4b0762b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8519e6883a942e510f33a0e634e27bcc3a844a40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8babb271403378ba6836f6c8599c5313d0e2355d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23419.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23419"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net/rds: Fix circular locking dependency in rds_tcp_tune"
}