{"cve":"CVE-2026-80744","nvd":{"published":"2026-09-03T13:06:13.730","modified":"2026-09-03T13:06:13.730","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables_offload: suppress WARN_ON_ONCE for ENOMEM in abort path\n\nIn nft_flow_rule_offload_abort(), WARN_ON_ONCE(err) is triggered on every\nerror during rollback, including -ENOMEM. Memory allocation failures are\nexpected under low-memory conditions and do not indicate a kernel bug.\n\nTrace for example:\nnft_flow_offload_chain() // FLOW_BLOCK_BIND\n  nft_flow_block_chain()\n    nft_chain_offload_cmd()\n      nft_block_offload_cmd()\n        ->ndo_setup_tc()\n        nsim_setup_tc()\n          flow_block_cb_setup_simple()\n            flow_block_cb_alloc() // fails to -ENOMEM\n\nThe warning was reproduced on the 5.10 stable kernel under memory pressure\nvia fault injection, but the underlying bug exists in mainline as well,\nas demonstrated by the ENOMEM trace above. The following splat was\ntriggered during nf_tables transaction processing:\n\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\nWARNING: CPU: 0 PID: 8567 at net/netfilter/nf_tables_offload.c:532 nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\nModules linked in:\nCPU: 0 PID: 8567 Comm: syz-executor.0 Not tainted 5.10.260-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014\nRIP: 0010:nft_flow_rule_offload_abort net/netfilter/nf_tables_offload.c:532 [inline]\nRIP: 0010:nft_flow_rule_offload_commit+0x971/0xcd0 net/netfilter/nf_tables_offload.c:591\nCall Trace:\n nf_tables_commit+0x3bd/0x4bd0 net/netfilter/nf_tables_api.c:8604\n nfnetlink_rcv_batch+0xb1e/0x1f20 net/netfilter/nfnetlink.c:509\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:579 [inline]\n nfnetlink_rcv+0x3b3/0x420 net/netfilter/nfnetlink.c:597\n netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\n netlink_unicast+0x6cd/0xa00 net/netfilter/af_netlink.c:1340\n netlink_sendmsg+0x906/0xe10 net/netfilter/af_netlink.c:1919\n sock_sendmsg_nosec net/socket.c:651 [inline]\n __sock_sendmsg+0x155/0x190 net/socket.c:663\n ____sys_sendmsg+0x705/0x870 net/socket.c:2379\n ___sys_sendmsg+0x100/0x170 net/socket.c:2433\n __sys_sendmsg+0xe9/0x1c0 net/socket.c:2462\n do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nChange the condition to WARN_ON_ONCE(err && err != -ENOMEM) so that\nwarnings are only emitted for unexpected errors. This aligns with the\ncommon kernel practice of not warning on -ENOMEM.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/09bda4b6df222fd1819e8f188c3a6e90caf546d3","https://git.kernel.org/stable/c/17c132e18ca5d1641ddbaed8d0e6ecfd1d38fa0b","https://git.kernel.org/stable/c/2319033c4bf8bdb275a9e4e1f7af9bf8a457ad79","https://git.kernel.org/stable/c/4a923fe60939a194777bc605036ce2147ab00c9d","https://git.kernel.org/stable/c/6ee3803c22b72508c5baf1e5aecb21301b714be0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80744","score":0.00177,"percentile":0.07257,"date":"2026-10-31"},"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."]}