{"id":21362,"date":"2026-09-12T04:31:05","date_gmt":"2026-09-11T20:31:05","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89440"},"modified":"2026-09-12T04:31:05","modified_gmt":"2026-09-11T20:31:05","slug":"cve-2026-89440","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89440","title":{"rendered":"CVE-2026-89440 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: stop"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mmc: via-sdmmc: stop card-detect handling on probe failure<\/p>\n<p>request_irq() registers the SD card-detect interrupt and the probe enables<br \/>\nit before mmc_add_host() runs. If mmc_add_host() fails, the error path only<br \/>\nunmaps the registers and returns: the interrupt stays registered, so the<br \/>\nhandler keeps running against the host once it is freed. via_sdc_isr()<br \/>\ndereferences sdhost and its MMIO base and schedules carddet_work, which<br \/>\nvia_sdc_card_detect() also runs against freed memory through its<br \/>\ncontainer_of() dereference.<\/p>\n<p>Add a probe-error path that disables and frees the interrupt and cancels<br \/>\ncarddet_work before unmapping. carddet_work can re-enable the device<br \/>\ninterrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it<br \/>\nagain after cancelling the work.<\/p>\n<p>This issue was found by an in-house static analysis tool and confirmed by<br \/>\nmanual code review.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mmc: via-sdmmc: stop card-detect handling on probe failure<\/p>\n<p>request_irq() registers the SD card-detect interrupt and the probe enab<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21362","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}