{"id":"CVE-2026-80977","summary":"net: skbuff: don't touch shared zerocopy state in skb_tx_error()","details":"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.","modified":"2026-09-18T18:26:38.581721352Z","published":"2026-09-11T19:42:38.862Z","related":["openSUSE-SU-2026:11805-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80977.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0370da114a9bc044e248b85c6809d1b5e0c1f7f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/15aa81b390d401abf4b8211042470e9e92e3b7fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/288f9970670841044ab030104fa6b6ed159949d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/363c4252ffc473a0203e91b83ede5519dfb8bd07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6493165034bca14033bf49c9cec7b45e97a91497"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ec22afc82a3cae07ade0a6ec361ae2532128ff5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4452349dcf4d561e13be768d5d278de58248930"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f66bdb1cc0fcd227a062378f8be0b5873aa5600a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80977.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80977"},{"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":"25121173f7b1e4ac3fc692df6e7b8c52ec36abba"},{"fixed":"6493165034bca14033bf49c9cec7b45e97a91497"},{"fixed":"b4452349dcf4d561e13be768d5d278de58248930"},{"fixed":"363c4252ffc473a0203e91b83ede5519dfb8bd07"},{"fixed":"6ec22afc82a3cae07ade0a6ec361ae2532128ff5"},{"fixed":"15aa81b390d401abf4b8211042470e9e92e3b7fb"},{"fixed":"288f9970670841044ab030104fa6b6ed159949d0"},{"fixed":"0370da114a9bc044e248b85c6809d1b5e0c1f7f9"},{"fixed":"f66bdb1cc0fcd227a062378f8be0b5873aa5600a"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-80977.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-80977.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}