{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99287","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.405Z","datePublished":"2026-11-10T18:16:54.253Z","dateUpdated":"2026-11-10T21:05:27.340Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-11-10T18:16:54.253Z"},"descriptions":[{"lang":"en","value":"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"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/xen-netback/netback.c"],"versions":[{"version":"2ac061ce97f413bfbbdd768f7d2e0fda2e8170df","lessThan":"87fd475dc4e354088f6534285388e7b061f54b35","status":"affected","versionType":"git"},{"version":"2ac061ce97f413bfbbdd768f7d2e0fda2e8170df","lessThan":"c5f54af611ff6fe1d53fa05d8e87b469dc56122b","status":"affected","versionType":"git"},{"version":"2ac061ce97f413bfbbdd768f7d2e0fda2e8170df","lessThan":"e7ba61734d6ad6adfd5bf617052e590743211669","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/xen-netback/netback.c"],"versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"6.12.117","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.63","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.3.4","lessThanOrEqual":"7.3.*","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.63"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.3.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/87fd475dc4e354088f6534285388e7b061f54b35"},{"url":"https://git.kernel.org/stable/c/c5f54af611ff6fe1d53fa05d8e87b469dc56122b"},{"url":"https://git.kernel.org/stable/c/e7ba61734d6ad6adfd5bf617052e590743211669"}],"title":"xen-netback: Zero out sring pointers on unmap","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/11/10/26"},{"url":"http://xenbits.xen.org/xsa/advisory-532.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-11-10T21:05:27.340Z"}}]}}