{"id":"CVE-2026-99287","summary":"xen-netback: Zero out sring pointers on unmap","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: Zero out sring pointers on unmap\n\nIf xenvif_map_frontend_data_rings() fails when a ring is already mapped,\nit unmaps them via xenvif_unmap_frontend_data_rings() which keeps the\nring pointers unchanged. xenvif_connect_data()'s cleanup path calls\nxenvif_disconnect_queue() which in turn calls\nxenvif_unmap_frontend_data_rings() again, which will attempt to unmap the\npointers a second time.\n\nZero out the ring pointers after they are unmapped to avoid this issue.\n\nThis is XSA-532","modified":"2026-11-11T10:45:25.492671739Z","published":"2026-11-10T18:16:54.253Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99287.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/11/10/26"},{"type":"ADVISORY","url":"http://xenbits.xen.org/xsa/advisory-532.html"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87fd475dc4e354088f6534285388e7b061f54b35"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5f54af611ff6fe1d53fa05d8e87b469dc56122b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7ba61734d6ad6adfd5bf617052e590743211669"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99287.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99287"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2ac061ce97f413bfbbdd768f7d2e0fda2e8170df"},{"fixed":"87fd475dc4e354088f6534285388e7b061f54b35"},{"fixed":"c5f54af611ff6fe1d53fa05d8e87b469dc56122b"},{"fixed":"e7ba61734d6ad6adfd5bf617052e590743211669"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99287.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"6.12.117"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.63"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.3.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99287.json"}}],"schema_version":"1.9.2"}