{"id":"CVE-2026-68286","revision":"c72a688e6cf848008c2ebfba23e7fb46","records":[{"revision":"c72a688e6cf848008c2ebfba23e7fb46","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68286","aliases":[],"title":"drop_monitor: perform u64_stats updates under IRQ-disabled section","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: perform u64_stats updates under IRQ-disabled section\n\nIn net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(),\nu64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were\ncalled after spin_unlock_irqrestore(&...drop_queue.lock, flags), when local\nIRQs had already been re-enabled.\n\nTracepoint probes can execute in IRQ or softirq context. On 32-bit\narchitectures, u64_stats_update_begin() disables preemption but not interrupts,\nrelying on seqcount writes. If a nested interrupt occurs on the same CPU during\nthe 64-bit stats update, the reentrant seqcount update can corrupt the\nseqcount state or stats value.\n\nFix this by performing the 64-bit per-CPU stats update before releasing\ndrop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain\ndisabled during the u64_stats update.","state":0,"publishedAt":"2026-08-10T12:02:19.077+00:00","modifiedAt":"2026-10-03T10:55:41.847+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/drop_monitor.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"dd8472526a04f2185afd792b8041a912a7d75d85\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"3454c729ee8aa682ec871f1b174b047f731933ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"be9b121894d6ad44f0011f79543a2e3245979497\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"d5e2cd2bc8ae36617346b3a54ee9da61d866bf92\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e9feb58020f952f7d9de785ede9a7d54ab1eda5c\",\n                            \"lessThan\": \"fd098a23bf8fda7eae48db9b06e7c34fc4d228fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/drop_monitor.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/dd8472526a04f2185afd792b8041a912a7d75d85","https://git.kernel.org/stable/c/3454c729ee8aa682ec871f1b174b047f731933ae","https://git.kernel.org/stable/c/be9b121894d6ad44f0011f79543a2e3245979497","https://git.kernel.org/stable/c/7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04","https://git.kernel.org/stable/c/d5e2cd2bc8ae36617346b3a54ee9da61d866bf92","https://git.kernel.org/stable/c/fd098a23bf8fda7eae48db9b06e7c34fc4d228fa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68286","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68286","identifiers":["CVE-2026-68286"]},"retained":false,"historicalAffected":[]}],"coverage":[]}