{"id":77403,"date":"2026-02-19T00:19:06","date_gmt":"2026-02-18T20:49:06","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-8860-qemu-kvm-uefi-vars-information-disclosure-vulnerability-in-uefi_vars_write-callback\/"},"modified":"2026-02-19T00:19:06","modified_gmt":"2026-02-18T20:49:06","slug":"cve-2025-8860-qemu-kvm-uefi-vars-information-disclosure-vulnerability-in-uefi_vars_write-callback","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-8860-qemu-kvm-uefi-vars-information-disclosure-vulnerability-in-uefi_vars_write-callback\/","title":{"rendered":"CVE-2025-8860 &#8211; Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback"},"content":{"rendered":"<p>CVE ID : CVE-2025-8860<\/p>\n<p>Published :  Feb. 18, 2026, 8:49 p.m. | 11\u00a0minutes ago<\/p>\n<p>Description : A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback `uefi_vars_write` is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. When the guest later reads from register UEFI_VARS_REG_PIO_BUFFER_TRANSFER, the .read callback `uefi_vars_read` returns leftover metadata or other sensitive process memory from the previously allocated buffer, leading to an information disclosure vulnerability.<\/p>\n<p>Severity: 3.3 | LOW<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-8860 Published : Feb. 18, 2026, 8:49 p.m. | 11\u00a0minutes ago Description : A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback `uefi_vars_write` is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-77403","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/77403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=77403"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/77403\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=77403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=77403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=77403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}