{"cve":"CVE-2026-23385","nvd":{"published":"2026-03-25T11:16:38.773","modified":"2026-10-21T13:18:36.637","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: clone set on flush only\n\nSyzbot with fault injection triggered a failing memory allocation with\nGFP_KERNEL which results in a WARN splat:\n\niter.err\nWARNING: net/netfilter/nf_tables_api.c:845 at nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845, CPU#0: syz.0.17/5992\nModules linked in:\nCPU: 0 UID: 0 PID: 5992 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026\nRIP: 0010:nft_map_deactivate+0x34e/0x3c0 net/netfilter/nf_tables_api.c:845\nCode: 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 <0f> 0b 90 43\n+80 7c 35 00 00 0f 85 23 fe ff ff e9 26 fe ff ff 89 d9\nRSP: 0018:ffffc900045af780 EFLAGS: 00010293\nRAX: ffffffff89ca45bd RBX: 00000000fffffff4 RCX: ffff888028111e40\nRDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000\nRBP: ffffc900045af870 R08: 0000000000400dc0 R09: 00000000ffffffff\nR10: dffffc0000000000 R11: fffffbfff1d141db R12: ffffc900045af7e0\nR13: 1ffff920008b5f24 R14: dffffc0000000000 R15: ffffc900045af920\nFS:  000055557a6a5500(0000) GS:ffff888125496000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fb5ea271fc0 CR3: 000000003269e000 CR4: 00000000003526f0\nCall Trace:\n <TASK>\n __nft_release_table+0xceb/0x11f0 net/netfilter/nf_tables_api.c:12115\n nft_rcv_nl_event+0xc25/0xdb0 net/netfilter/nf_tables_api.c:12187\n notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85\n blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380\n netlink_release+0x123b/0x1ad0 net/netlink/af_netlink.c:761\n __sock_release net/socket.c:662 [inline]\n sock_close+0xc3/0x240 net/socket.c:1455\n\nRestrict set clone to the flush set command in the preparation phase.\nAdd NFT_ITER_UPDATE_CLONE and use it for this purpose, update the rbtree\nand pipapo backends to only clone the set when this iteration type is\nused.\n\nAs for the existing NFT_ITER_UPDATE type, update the pipapo backend to\nuse the existing set clone if available, otherwise use the existing set\nrepresentation. After this update, there is no need to clone a set that\nis being deleted, this includes bound anonymous set.\n\nAn alternative approach to NFT_ITER_UPDATE_CLONE is to add a .clone\ninterface and call it from the flush set path.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/454306ceb94dc47a52443181082c91204c007a74","https://git.kernel.org/stable/c/9154945a6394029822bd08c24cef5a3f86d0424a","https://git.kernel.org/stable/c/b7f67282ca2be14b727dd698b50e10cf5d8c66f9","https://git.kernel.org/stable/c/e38f054f0af98224003e600545726fbd96379cfb","https://git.kernel.org/stable/c/fb7fb4016300ac622c964069e286dc83166a5d52"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-23385","score":0.0019,"percentile":0.08619,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}