{
  "cveId": "CVE-2026-23385",
  "url": "https://patchblox.com/security/cve/CVE-2026-23385",
  "summary": "CVE-2026-23385 is fixed in 23 products on 1 platform, first by DEBIAN-CVE-2026-23385, released March 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_tables: clone set on flush only  S...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_tables: clone set on flush only  Syzbot with fault injection triggered a failing memory allocation with GFP_KERNEL which results in a WARN splat:  iter.err WARNING: net/netfilter/nf_tables_api.c:845 at nft_map_deactivate\u002B0x34e/0x3c0 net/netfilter/nf_tables_api.c:845, CPU#0: syz.0.17/5992 Modules linked in: CPU: 0 UID: 0 PID: 5992 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:nft_map_deactivate\u002B0x34e/0x3c0 net/netfilter/nf_tables_api.c:845 Code: 8b 05 86 5a 4e 09 48 3b 84 24 a0 00 00 00 75 62 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 63 6d fa f7 90 \u003C0f\u003E 0b 90 43 \u002B80 7c 35 00 00 0f 85 23 fe ff ff e9 26 fe ff ff 89 d9 RSP: 0018:ffffc900045af780 EFLAGS: 00010293 RAX: ffffffff89ca45bd RBX: 00000000fffffff4 RCX: ffff888028111e40 RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000 RBP: ffffc900045af870 R08: 0000000000400dc0 R09: 00000000ffffffff R10: dffffc0000000000 R11: fffffbfff1d141db R12: ffffc900045af7e0 R13: 1ffff920008b5f24 R14: dffffc0000000000 R15: ffffc900045af920 FS:  000055557a6a5500(0000) GS:ffff888125496000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5ea271fc0 CR3: 000000003269e000 CR4: 00000000003526f0 Call Trace:  \u003CTASK\u003E  __nft_release_table\u002B0xceb/0x11f0 net/netfilter/nf_tables_api.c:12115  nft_rcv_nl_event\u002B0xc25/0xdb0 net/netfilter/nf_tables_api.c:12187  notifier_call_chain\u002B0x19d/0x3a0 kernel/notifier.c:85  blocking_notifier_call_chain\u002B0x6a/0x90 kernel/notifier.c:380  netlink_release\u002B0x123b/0x1ad0 net/netlink/af_netlink.c:761  __sock_release net/socket.c:662 [inline]  sock_close\u002B0xc3/0x240 net/socket.c:1455  Restrict set clone to the flush set command in the preparation phase. Add NFT_ITER_UPDATE_CLONE and use it for this purpose, update the rbtree and pipapo backends to only clone the set when this iteration type is used.  As for the existing NFT_ITER_UPDATE type, update the pipapo backend to use the existing set clone if available, otherwise use the existing set representation. After this update, there is no need to clone a set that is being deleted, this includes bound anonymous set.  An alternative approach to NFT_ITER_UPDATE_CLONE is to add a .clone interface and call it from the flush set path.",
  "published": "2026-03-25T11:16:38Z",
  "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": 0.00191,
  "epssPercentile": 0.08838,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.20-20.229.amzn2023",
      "fix": "ALAS2023-2026-1596",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1596",
      "released": "2026-04-27T09:00:00Z"
    },
    {
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      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.20-20.229.amzn2023",
      "fix": "ALAS2023-2026-1596",
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      "released": "2026-04-27T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.20-20.229",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1596",
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      "released": "2026-04-27T09:00:00Z"
    },
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      "fix": "ALAS2023-2026-1596",
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      "released": "2026-04-27T09:00:00Z"
    },
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      "fix": "ALAS2023-2026-1596",
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    },
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      "fix": "ALAS2023-2026-1596",
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    },
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      "fix": "ALAS2023-2026-1596",
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      "fix": "ALAS2023-2026-1596",
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      "fix": "ALAS2023-2026-1596",
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      "fix": "ALAS2023-2026-1596",
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1596",
      "released": "2026-04-27T09:00:00Z"
    },
    {
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    {
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    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}