{"id":"CVE-2026-23326","summary":"xsk: Fix fragment node deletion to prevent buffer leak","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix fragment node deletion to prevent buffer leak\n\nAfter commit b692bf9a7543 (\"xsk: Get rid of xdp_buff_xsk::xskb_list_node\"),\nthe list_node field is reused for both the xskb pool list and the buffer\nfree list, this causes a buffer leak as described below.\n\nxp_free() checks if a buffer is already on the free list using\nlist_empty(&xskb-\u003elist_node). When list_del() is used to remove a node\nfrom the xskb pool list, it doesn't reinitialize the node pointers.\nThis means list_empty() will return false even after the node has been\nremoved, causing xp_free() to incorrectly skip adding the buffer to the\nfree list.\n\nFix this by using list_del_init() instead of list_del() in all fragment\nhandling paths, this ensures the list node is reinitialized after removal,\nallowing the list_empty() to work correctly.","modified":"2026-04-23T18:29:24.527510896Z","published":"2026-03-25T10:27:19.021Z","related":["SUSE-SU-2026:21237-1","openSUSE-SU-2026:20572-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23326.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861"},{"type":"WEB","url":"https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23326.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23326"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"560c974b7ccd95bb9ff20df77f6654283e45c9c6"},{"fixed":"5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fd5614763805d6f386bd07cc53558f88b1b1eb62"},{"fixed":"2a9ea988465ece5b6896b1bdc144170a64e84c35"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b692bf9a7543af7ad11a59d182a3757578f0ba53"},{"fixed":"645c6d8376ad4913cbffe0e0c2cca0c4febbe596"},{"fixed":"b38cbd4af5034635cff109e08788c63f956f3a69"},{"fixed":"60abb0ac11dccd6b98fd9182bc5f85b621688861"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23326.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.17"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23326.json"}}],"schema_version":"1.7.5"}