{"id":"CVE-2026-80977","revision":"17521896db044fc8aba9b2676a9cbb44","records":[{"revision":"17521896db044fc8aba9b2676a9cbb44","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80977","aliases":[],"title":"net: skbuff: don't touch shared zerocopy state in skb_tx_error()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: don't touch shared zerocopy state in skb_tx_error()\n\nskb_tx_error() completes the zerocopy uarg and clears\nSKBFL_ALL_ZEROCOPY, and skb_zcopy_downgrade_managed() clears\nSKBFL_MANAGED_FRAG_REFS. Both live in skb_shinfo(), which every clone\nshares, while the caller only owns the reference it is about to drop.\nThrough a clone it tells the producer its pages are free and drops\nSKBFL_SHARED_FRAG for an skb that is still in flight.\n\nOpen vSwitch reaches this with a non-last OVS_ACTION_ATTR_RECIRC:\nclone_execute() sends a skb_clone() into ovs_dp_process_packet() while\ndo_execute_actions() keeps forwarding the original, and skb_clone()\ndoes not privatise the frags here -- skb_orphan_frags() returns early\non SKBFL_DONT_ORPHAN. A flow miss on the clone then strips the marker\nfrom the packet still being forwarded, and a later local ESP delivery\ndecrypts in place over frags it does not own privately.\n\nSkip it for a cloned skb. Nothing is lost: skb_release_data() clears\nthe zerocopy state once the last reference to the shared data goes.","state":0,"publishedAt":"2026-09-11T19:42:38.862+00:00","modifiedAt":"2026-10-19T08:46:01.788+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/skbuff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"6493165034bca14033bf49c9cec7b45e97a91497\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"b4452349dcf4d561e13be768d5d278de58248930\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"363c4252ffc473a0203e91b83ede5519dfb8bd07\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"6ec22afc82a3cae07ade0a6ec361ae2532128ff5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"15aa81b390d401abf4b8211042470e9e92e3b7fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"288f9970670841044ab030104fa6b6ed159949d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"0370da114a9bc044e248b85c6809d1b5e0c1f7f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25121173f7b1e4ac3fc692df6e7b8c52ec36abba\",\n                            \"lessThan\": \"f66bdb1cc0fcd227a062378f8be0b5873aa5600a\",\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/skbuff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/6493165034bca14033bf49c9cec7b45e97a91497","https://git.kernel.org/stable/c/b4452349dcf4d561e13be768d5d278de58248930","https://git.kernel.org/stable/c/363c4252ffc473a0203e91b83ede5519dfb8bd07","https://git.kernel.org/stable/c/6ec22afc82a3cae07ade0a6ec361ae2532128ff5","https://git.kernel.org/stable/c/15aa81b390d401abf4b8211042470e9e92e3b7fb","https://git.kernel.org/stable/c/288f9970670841044ab030104fa6b6ed159949d0","https://git.kernel.org/stable/c/0370da114a9bc044e248b85c6809d1b5e0c1f7f9","https://git.kernel.org/stable/c/f66bdb1cc0fcd227a062378f8be0b5873aa5600a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80977","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80977","identifiers":["CVE-2026-80977"]},"retained":false,"historicalAffected":[]}],"coverage":[]}