{"id":"CVE-2024-56756","state":"PUBLISHED","title":"nvme-pci: fix freeing of the HMB descriptor table","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix freeing of the HMB descriptor table\n\nThe HMB descriptor table is sized to the maximum number of descriptors\nthat could be used for a given device, but __nvme_alloc_host_mem could\nbreak out of the loop earlier on memory allocation failure and end up\nusing less descriptors than planned for, which leads to an incorrect\nsize passed to dma_free_coherent.\n\nIn practice this was not showing up because the number of descriptors\ntends to be low and the dma coherent allocator always allocates and\nfrees at least a page.","publishedAt":"2024-12-29T11:30:20.516Z","updatedAt":"2026-05-11T20:58:28.895Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"ac22240540e0c5230d8c4138e3778420b712716a","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"452f9ddd12bebc04cef741e8ba3806bf0e1fd015","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"869cf50b9c9d1059f5223f79ef68fc0bc6210095","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"fb96d5cfa97a7363245b3dd523f475b04296d87b","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"cee3bff51a35cab1c5d842d409a7b11caefe2386","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"6d0f599db73b099aa724a12736369c4d4d92849d","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"582d9ed999b004fb1d415ecbfa86d4d8df455269","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"3c2fb1ca8086eb139b2a551358137525ae8e0d7a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"5.4.287","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.231","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.174","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.120","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.11","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12.2","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/pci.c"]}],"references":["https://git.kernel.org/stable/c/ac22240540e0c5230d8c4138e3778420b712716a","https://git.kernel.org/stable/c/452f9ddd12bebc04cef741e8ba3806bf0e1fd015","https://git.kernel.org/stable/c/869cf50b9c9d1059f5223f79ef68fc0bc6210095","https://git.kernel.org/stable/c/fb96d5cfa97a7363245b3dd523f475b04296d87b","https://git.kernel.org/stable/c/cee3bff51a35cab1c5d842d409a7b11caefe2386","https://git.kernel.org/stable/c/6d0f599db73b099aa724a12736369c4d4d92849d","https://git.kernel.org/stable/c/582d9ed999b004fb1d415ecbfa86d4d8df455269","https://git.kernel.org/stable/c/3c2fb1ca8086eb139b2a551358137525ae8e0d7a","https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:08:12.933Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/56xxx/CVE-2024-56756.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-56756","state":"PUBLISHED","datePublished":"2024-12-29T11:30:20.516Z","dateUpdated":"2026-05-11T20:58:28.895Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T11:26:39.761Z"},"containers":{"cna":{"title":"nvme-pci: fix freeing of the HMB descriptor table","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix freeing of the HMB descriptor table\n\nThe HMB descriptor table is sized to the maximum number of descriptors\nthat could be used for a given device, but __nvme_alloc_host_mem could\nbreak out of the loop earlier on memory allocation failure and end up\nusing less descriptors than planned for, which leads to an incorrect\nsize passed to dma_free_coherent.\n\nIn practice this was not showing up because the number of descriptors\ntends to be low and the dma coherent allocator always allocates and\nfrees at least a page."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"ac22240540e0c5230d8c4138e3778420b712716a","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"452f9ddd12bebc04cef741e8ba3806bf0e1fd015","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"869cf50b9c9d1059f5223f79ef68fc0bc6210095","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"fb96d5cfa97a7363245b3dd523f475b04296d87b","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"cee3bff51a35cab1c5d842d409a7b11caefe2386","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"6d0f599db73b099aa724a12736369c4d4d92849d","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"582d9ed999b004fb1d415ecbfa86d4d8df455269","versionType":"git"},{"version":"87ad72a59a38d1df217cfd95bc222a2edfe5d399","status":"affected","lessThan":"3c2fb1ca8086eb139b2a551358137525ae8e0d7a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/pci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"5.4.287","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.231","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.174","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.120","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.11","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12.2","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/pci.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ac22240540e0c5230d8c4138e3778420b712716a"},{"url":"https://git.kernel.org/stable/c/452f9ddd12bebc04cef741e8ba3806bf0e1fd015"},{"url":"https://git.kernel.org/stable/c/869cf50b9c9d1059f5223f79ef68fc0bc6210095"},{"url":"https://git.kernel.org/stable/c/fb96d5cfa97a7363245b3dd523f475b04296d87b"},{"url":"https://git.kernel.org/stable/c/cee3bff51a35cab1c5d842d409a7b11caefe2386"},{"url":"https://git.kernel.org/stable/c/6d0f599db73b099aa724a12736369c4d4d92849d"},{"url":"https://git.kernel.org/stable/c/582d9ed999b004fb1d415ecbfa86d4d8df455269"},{"url":"https://git.kernel.org/stable/c/3c2fb1ca8086eb139b2a551358137525ae8e0d7a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:58:28.895Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.4.287"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.10.231"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.15.174"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.1.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.6.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.11.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.13"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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