{"id":"CVE-2026-74695","summary":"netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()\n\nIncoming skbs passing through netfilter flowtable offload hooks (or XFRM\noffload path) might already carry a ref-counted dst_entry assigned during\nearlier RX or routing steps.\n\nCalling skb_dst_set_noref() when skb already holds a ref-counted dst\noverwrites skb-\u003e_skb_refdst, leaking the previous dst_entry reference\ncount and triggering a DEBUG_NET_WARN_ON_ONCE assertion in\nskb_dst_check_unset():\n\n  WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170\n  WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234\n  WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864\n\nDrop any existing dst_entry reference with skb_dst_drop(skb) before\nsetting the non-referenced flowtable destination.","modified":"2026-10-28T02:30:46.684954896Z","published":"2026-08-22T15:32:57.756Z","related":["SUSE-SU-2026:23477-1","SUSE-SU-2026:23481-1","SUSE-SU-2026:23528-1","SUSE-SU-2026:23529-1","SUSE-SU-2026:23881-1","SUSE-SU-2026:23887-1","SUSE-SU-2026:23897-1","SUSE-SU-2026:23902-1","SUSE-SU-2026:4120-1","SUSE-SU-2026:4254-1","SUSE-SU-2026:4279-1","SUSE-SU-2026:4284-1","SUSE-SU-2026:4347-1","SUSE-SU-2026:4369-1","SUSE-SU-2026:4595-1","openSUSE-SU-2026:21910-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74695.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/274f544a32c08638ee887f2e27e3235b6b1237d4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4db3b48a966ed479b99cc8319ea9e46d4f7c703b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74695.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74695"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2a79fd3908acd88e6cb0e620c314d7b1fee56a02"},{"fixed":"4db3b48a966ed479b99cc8319ea9e46d4f7c703b"},{"fixed":"274f544a32c08638ee887f2e27e3235b6b1237d4"},{"fixed":"12afa450a6a6c0cce2c42b7545a9958f62d8a00c"},{"fixed":"538e67e8c7889cf5f93951f5309d1bcb41f86036"},{"fixed":"8aecf0bbcc72605592134c917c222207d8f63ab0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.16.15"},{"fixed":"4.17"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.17.1"},{"fixed":"4.18"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"209dedf806d31095968f54323dbe62525b077b33"}]}],"versions":["v4.16.18","v4.16.17","v4.16.16","v4.16.15","v4.17.19","v4.17.18","v4.17.17","v4.17.16","v4.17.15","v4.17.14","v4.17.13","v4.17.12","v4.17.11","v4.17.10","v4.17.9","v4.17.8","v4.17.7","v4.17.6","v4.17.5","v4.17.4","v4.17.3","v4.17.2","v4.17.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74695.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.18.0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74695.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}