{"id":"CVE-2025-21913","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range()\n\nXen doesn't offer MSR_FAM10H_MMIO_CONF_BASE to all guests","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range()\n\nXen doesn't offer MSR_FAM10H_MMIO_CONF_BASE to all guests.  This results\nin the following warning:\n\n  unchecke…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.1, < 6.1.131","linux_kernel >= 6.2, < 6.6.83","linux_kernel >= 6.7, < 6.12.19","linux_kernel >= 6.13, < 6.13.7","linux_kernel = 6.14"],"patched":["linux_kernel 6.13.7"],"published":"2025-04-01","updated":"2026-07-14","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21913","references":[{"url":"https://git.kernel.org/stable/c/0c65d13bdcc54e5b924ebe790f85a7f01bfe1cb1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/14cb5d83068ecf15d2da6f7d0e9ea9edbcbc0457","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f43ba5ee498fe037d1570f6868d9aeaf49dda80","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/923fede9eae9865af305bcdf8f111e4b62ae4bda","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ebf6a763904e42dabeb2e270ceb0bbe0f825d7ae","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00205,"epssPercentile":0.09314,"ingestedAt":"2026-07-14T13:36:56.034Z","slug":"CVE-2025-21913","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range()\n\nXen doesn't offer MSR_FAM10H_MMIO_CONF_BASE to all guests.  This results\nin the following warning:\n\n  unchecked MSR access error: RDMSR from 0xc0010058 at rIP: 0xffffffff8101d19f (xen_do_read_msr+0x7f/0xa0)\n  Call Trace:\n   xen_read_msr+0x1e/0x30\n   amd_get_mmconfig_range+0x2b/0x80\n   quirk_amd_mmconfig_area+0x28/0x100\n   pnp_fixup_device+0x39/0x50\n   __pnp_add_device+0xf/0x150\n   pnp_add_device+0x3d/0x100\n   pnpacpi_add_device_handler+0x1f9/0x280\n   acpi_ns_get_device_callback+0x104/0x1c0\n   acpi_ns_walk_namespace+0x1d0/0x260\n   acpi_get_devices+0x8a/0xb0\n   pnpacpi_init+0x50/0x80\n   do_one_initcall+0x46/0x2e0\n   kernel_init_freeable+0x1da/0x2f0\n   kernel_init+0x16/0x1b0\n   ret_from_fork+0x30/0x50\n   ret_from_fork_asm+0x1b/0x30\n\nbased on quirks for a \"PNP0c01\" device.  Treating MMCFG as disabled is the\nright course of action, so no change is needed there.\n\nThis was most likely exposed by fixing the Xen MSR accessors to not be\nsilently-safe.\n\n## Affected\n\n- `linux_kernel >= 6.1, < 6.1.131`\n- `linux_kernel >= 6.2, < 6.6.83`\n- `linux_kernel >= 6.7, < 6.12.19`\n- `linux_kernel >= 6.13, < 6.13.7`\n- `linux_kernel = 6.14`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.13.7`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}