mirror of
https://github.com/CVEProject/cvelist.git
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102 lines
5.0 KiB
JSON
102 lines
5.0 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-49964",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: fix memfd_pin_folios free_huge_pages leak\n\nmemfd_pin_folios followed by unpin_folios fails to restore free_huge_pages\nif the pages were not already faulted in, because the folio refcount for\npages created by memfd_alloc_folio never goes to 0. memfd_pin_folios\nneeds another folio_put to undo the folio_try_get below:\n\nmemfd_alloc_folio()\n alloc_hugetlb_folio_nodemask()\n dequeue_hugetlb_folio_nodemask()\n dequeue_hugetlb_folio_node_exact()\n folio_ref_unfreeze(folio, 1); ; adds 1 refcount\n folio_try_get() ; adds 1 refcount\n hugetlb_add_to_page_cache() ; adds 512 refcount (on x86)\n\nWith the fix, after memfd_pin_folios + unpin_folios, the refcount for the\n(unfaulted) page is 512, which is correct, as the refcount for a faulted\nunpinned page is 513."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "89c1905d9c14",
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"version_value": "59e081ff2e91"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "6.11",
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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": "6.11",
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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": "6.11.3",
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"lessThanOrEqual": "6.11.*",
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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",
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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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"defaultStatus": "affected"
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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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}
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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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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/59e081ff2e91bbf19b8c1ecb75b031f778858383",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/59e081ff2e91bbf19b8c1ecb75b031f778858383"
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},
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{
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"url": "https://git.kernel.org/stable/c/c56b6f3d801d7ec8965993342bdd9e2972b6cb8e",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/c56b6f3d801d7ec8965993342bdd9e2972b6cb8e"
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}
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]
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},
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"generator": {
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"engine": "bippy-8e903de6a542"
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}
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} |