206 lines
11 KiB
JSON
206 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-54137",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-24T13:02:52.522Z",
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"datePublished": "2025-12-24T13:06:52.689Z",
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"dateUpdated": "2026-05-11T19:56:12.086Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T19:56:12.086Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/type1: fix cap_migration information leak\n\nFix an information leak where an uninitialized hole in struct\nvfio_iommu_type1_info_cap_migration on the stack is exposed to userspace.\n\nThe definition of struct vfio_iommu_type1_info_cap_migration contains a hole as\nshown in this pahole(1) output:\n\n struct vfio_iommu_type1_info_cap_migration {\n struct vfio_info_cap_header header; /* 0 8 */\n __u32 flags; /* 8 4 */\n\n /* XXX 4 bytes hole, try to pack */\n\n __u64 pgsize_bitmap; /* 16 8 */\n __u64 max_dirty_bitmap_size; /* 24 8 */\n\n /* size: 32, cachelines: 1, members: 4 */\n /* sum members: 28, holes: 1, sum holes: 4 */\n /* last cacheline: 32 bytes */\n };\n\nThe cap_mig variable is filled in without initializing the hole:\n\n static int vfio_iommu_migration_build_caps(struct vfio_iommu *iommu,\n struct vfio_info_cap *caps)\n {\n struct vfio_iommu_type1_info_cap_migration cap_mig;\n\n cap_mig.header.id = VFIO_IOMMU_TYPE1_INFO_CAP_MIGRATION;\n cap_mig.header.version = 1;\n\n cap_mig.flags = 0;\n /* support minimum pgsize */\n cap_mig.pgsize_bitmap = (size_t)1 << __ffs(iommu->pgsize_bitmap);\n cap_mig.max_dirty_bitmap_size = DIRTY_BITMAP_SIZE_MAX;\n\n return vfio_info_add_capability(caps, &cap_mig.header, sizeof(cap_mig));\n }\n\nThe structure is then copied to a temporary location on the heap. At this point\nit's already too late and ioctl(VFIO_IOMMU_GET_INFO) copies it to userspace\nlater:\n\n int vfio_info_add_capability(struct vfio_info_cap *caps,\n struct vfio_info_cap_header *cap, size_t size)\n {\n struct vfio_info_cap_header *header;\n\n header = vfio_info_cap_add(caps, size, cap->id, cap->version);\n if (IS_ERR(header))\n return PTR_ERR(header);\n\n memcpy(header + 1, cap + 1, size - sizeof(*header));\n\n return 0;\n }\n\nThis issue was found by code inspection."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/vfio/vfio_iommu_type1.c"
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],
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"versions": [
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "ad83d83dd891244de0d07678b257dc976db7c132",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "13fd667db999bffb557c5de7adb3c14f1713dd51",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "f6f300ecc196d243c02adeb9ee0c62c677c24bfb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "cbac29a1caa49a34e131394e1f4d924a76d8b0c9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "1b5feb8497cdb5b9962db2700814bffbc030fb4a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ad721705d09c62f0d108a6b4f59867ebfd592c90",
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"lessThan": "cd24e2a60af633f157d7e59c0a6dba64f131c0b1",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/vfio/vfio_iommu_type1.c"
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],
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"versions": [
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{
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"version": "5.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.195",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.132",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.53",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.4.16",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5.3",
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"lessThanOrEqual": "6.5.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "5.10.195"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "5.15.132"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.1.53"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.4.16"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.5.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.6"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ad83d83dd891244de0d07678b257dc976db7c132"
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},
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{
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"url": "https://git.kernel.org/stable/c/13fd667db999bffb557c5de7adb3c14f1713dd51"
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},
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{
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"url": "https://git.kernel.org/stable/c/f6f300ecc196d243c02adeb9ee0c62c677c24bfb"
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},
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{
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"url": "https://git.kernel.org/stable/c/cbac29a1caa49a34e131394e1f4d924a76d8b0c9"
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},
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{
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"url": "https://git.kernel.org/stable/c/1b5feb8497cdb5b9962db2700814bffbc030fb4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/cd24e2a60af633f157d7e59c0a6dba64f131c0b1"
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}
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],
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"title": "vfio/type1: fix cap_migration information leak",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |