Skip to content
Heist/ feed
Unrated

HID: amd_sfh: Validate PCI BAR size before mapping

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: HID: amd_sfh: Validate PCI BAR size before mapping The amd_sfh driver maps PCI BAR 2 using pcim_iomap_regions() and subsequently accesses MMIO registers at offsets up to 0x10958 (e.g., AMD_P2C_MSG3 at 0x1068C). However, the driver never validates that the BAR size is large enough to cover these accesses. If the driver is bound to a device with a smaller BAR 2, this leads to an out-of-bounds memory access and a page fault during the probe function. For example, a page fault can occur when reading from privdata->mmio + AMD_P2C_MSG3 in mp2_select_ops(): BUG: unable to handle page fault for address: ffffc9000390368c PGD 100000067 P4D 100000067 PUD 1012c1067 PMD 105b64067 PTE 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline] RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282 [inline] RIP: 0010:amd_mp2_pci_probe+0x337/0x5f0 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487 Call Trace: local_pci_probe drivers/pci/pci-driver.c:332 [inline] pci_call_probe drivers/pci/pci-driver.c:394 [inline] __pci_device_probe drivers/pci/pci-driver.c:455 [inline] pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489 Fix this by verifying that the length of BAR 2 is at least 128KB before attempting to map it. Since the maximum accessed offset is 0x10958, and PCI BAR sizes are powers of 2, any legitimate hardware will have a BAR size of at least 128KB.

Announced Source revision 1
Original source ↗

CVE-2026-98640

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98640

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "92bf2883da0306ab9d1eb794acd1058fc5088ebc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "7b3747d77767f066ccf4a9e8e3a8381643ab5368",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "5ff24aa7af0bca0780fe4e6effce902065f2c0a7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "dc687489131559ee52f447592f6d039a5a013061",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "5f9e2ecb725adced013fbf5f94b9f185fad2e7d9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "ee25833f037fa22d23ffdbfeebabe3579e8a0346",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4f567b9f8141a86c7d878fadf136e5d1408e3e61",
        "lessThan": "65bcc5f89704efe5b9d69d4ea2c1002d90c31382",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/hid/amd-sfh-hid/amd_sfh_common.h",
      "drivers/hid/amd-sfh-hid/amd_sfh_pcie.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/hid/amd-sfh-hid/amd_sfh_common.h",
      "drivers/hid/amd-sfh-hid/amd_sfh_pcie.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98640

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38661 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement