298 lines
14 KiB
JSON
298 lines
14 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-2026-31787",
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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": "2026-03-09T15:48:24.141Z",
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"datePublished": "2026-04-30T10:31:28.992Z",
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"dateUpdated": "2026-11-06T15:32:25.719Z"
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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": "2026-06-14T17:44:41.402Z"
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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\nxen/privcmd: fix double free via VMA splitting\n\nprivcmd_vm_ops defines .close (privcmd_close), but neither .may_split\nnor .open. When userspace does a partial munmap() on a privcmd mapping,\nthe kernel splits the VMA via __split_vma(). Since may_split is NULL,\nthe split is allowed. vm_area_dup() copies vm_private_data (a pages\narray allocated in alloc_empty_pages()) into the new VMA without any\nfixup, because there is no .open callback.\n\nBoth VMAs now point to the same pages array. When the unmapped portion\nis closed, privcmd_close() calls:\n - xen_unmap_domain_gfn_range()\n - xen_free_unpopulated_pages()\n - kvfree(pages)\n\nThe surviving VMA still holds the dangling pointer. When it is later\ndestroyed, the same sequence runs again, which leads to a double free.\n\nFix this issue by adding a .may_split callback denying the VMA split.\n\nThis is XSA-487 / CVE-2026-31787"
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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/xen/privcmd.c"
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],
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"versions": [
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{
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"version": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "dbf862ce9f009128ab86b234d91413a3e450beb4",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "2b985d3a024b9e8c24e21671b34e855569763808",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "1576ff3869cbd3620717195f971c85b7d7fd62b5",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "402d84ad9e89bd4cbfd07ca8598532b7021daf95",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "2894a351fe2ea8684919d36df3188b9a35e3926f",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "446ee446d9ae66f36e95c3c90bbcc4e56b94cde0",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "71bf829800758a6e3889096e4754ef47ba7fc850",
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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": "d71f513985c22f1050295d1a7e4327cf9fb060da",
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"lessThan": "24daca4fc07f3ff8cd0e3f629cd982187f48436a",
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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/xen/privcmd.c"
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],
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"versions": [
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{
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"version": "3.8",
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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": "3.8",
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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": "5.10.254",
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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": "5.15.204",
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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": "6.1.170",
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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": "6.6.137",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.85",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.26",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.3",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "3.8",
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"versionEndExcluding": "5.10.254"
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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": "3.8",
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"versionEndExcluding": "5.15.204"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.12.85"
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"versionEndExcluding": "6.18.26"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.8",
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"versionEndExcluding": "7.0.3"
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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/dbf862ce9f009128ab86b234d91413a3e450beb4"
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},
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{
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"url": "https://git.kernel.org/stable/c/2b985d3a024b9e8c24e21671b34e855569763808"
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},
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{
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"url": "https://git.kernel.org/stable/c/1576ff3869cbd3620717195f971c85b7d7fd62b5"
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},
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{
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"url": "https://git.kernel.org/stable/c/402d84ad9e89bd4cbfd07ca8598532b7021daf95"
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},
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{
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"url": "https://git.kernel.org/stable/c/2894a351fe2ea8684919d36df3188b9a35e3926f"
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},
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{
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"url": "https://git.kernel.org/stable/c/446ee446d9ae66f36e95c3c90bbcc4e56b94cde0"
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},
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{
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"url": "https://git.kernel.org/stable/c/71bf829800758a6e3889096e4754ef47ba7fc850"
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},
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{
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"url": "https://git.kernel.org/stable/c/24daca4fc07f3ff8cd0e3f629cd982187f48436a"
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}
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],
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"title": "xen/privcmd: fix double free via VMA splitting",
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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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"adp": [
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "http://www.openwall.com/lists/oss-security/2026/04/28/14"
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},
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{
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"url": "http://xenbits.xen.org/xsa/advisory-487.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2026-04-30T10:39:37.622Z"
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}
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},
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-31787",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T15:25:39.751360Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T15:32:25.719Z"
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}
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}
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]
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}
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} |