{
  "cveId": "CVE-2026-23419",
  "url": "https://patchblox.com/security/cve/CVE-2026-23419",
  "summary": "CVE-2026-23419 is fixed in 59 products on 1 platform, first by DEBIAN-CVE-2026-23419, released April 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net/rds: Fix circular locking dependency in rds_...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/rds: Fix circular locking dependency in rds_tcp_tune  syzbot reported a circular locking dependency in rds_tcp_tune() where sk_net_refcnt_upgrade() is called while holding the socket lock:  ====================================================== WARNING: possible circular locking dependency detected ====================================================== kworker/u10:8/15040 is trying to acquire lock: ffffffff8e9aaf80 (fs_reclaim){\u002B.\u002B.}-{0:0}, at: __kmalloc_cache_noprof\u002B0x4b/0x6f0  but task is already holding lock: ffff88805a3c1ce0 (k-sk_lock-AF_INET6){\u002B.\u002B.}-{0:0}, at: rds_tcp_tune\u002B0xd7/0x930  The issue occurs because sk_net_refcnt_upgrade() performs memory allocation (via get_net_track() -\u003E ref_tracker_alloc()) while the socket lock is held, creating a circular dependency with fs_reclaim.  Fix this by moving sk_net_refcnt_upgrade() outside the socket lock critical section. This is safe because the fields modified by the sk_net_refcnt_upgrade() call (sk_net_refcnt, ns_tracker) are not accessed by any concurrent code path at this point.  v2:   - Corrected fixes tag   - check patch line wrap nits   - ai commentary nits",
  "published": "2026-04-03T14:16:27Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00193,
  "epssPercentile": 0.09075,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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