{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-47732", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-30T16:00:12.958Z", "datePublished": "2024-10-21T12:14:03.863Z", "dateUpdated": "2026-08-05T11:39:48.573Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:39:48.573Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: iaa - Fix potential use after free bug\n\nThe free_device_compression_mode(iaa_device, device_mode) function frees\n\"device_mode\" but it iss passed to iaa_compression_modes[i]->free() a few\nlines later resulting in a use after free.\n\nThe good news is that, so far as I can tell, nothing implements the\n->free() function and the use after free happens in dead code. But, with\nthis fix, when something does implement it, we'll be ready. :)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable teardown is reached only through local operations — idxd sysfs driver bind/unbind, module unload, or a local crypto/acomp request dropping the final workqueue reference. Nothing in drivers/crypto/intel/iaa/ processes remote input, so there is no network or adjacent path.\nAC:H - The UAF statement is guarded by `iaa_compression_modes[i]->free` being non-NULL, and the only in-tree registrant (iaa_aecs_init_fixed) passes NULL, making the call site dead code on every mainline kernel; the attacker cannot cause a ->free implementation to exist. Additionally CONFIG_CRYPTO_DEV_IAA_CRYPTO is default-n and in no defconfig, requires Intel IAA hardware, and the unprivileged variant needs an administrator to concurrently unbind the wq — all conditions outside attacker control.\nPR:L - Once the preconditions hold, the vulnerable teardown can execute in an unprivileged context: iaa_wq_put() on the acomp compress/decompress path (reachable by any local user via the registered \"deflate\" algorithm, e.g. through zswap) drops the final reference and calls free_iaa_device() → remove_device_compression_modes(). The dominant paths (unbind, module unload, probe) are root-only, but this unprivileged final-put path exists.\nUI:N - No victim action such as opening a file or mounting a filesystem is needed; the freed-pointer callback runs as a direct consequence of the teardown sequence itself.\nS:U - The corruption is confined to kernel slab memory within the same security authority — there is no VM, IOMMU, or sandbox boundary crossed by this driver teardown path.\nC:H - A use-after-free on a kmalloc'd struct iaa_device_compression_mode lets an attacker who reclaims the slot control the fields the ->free() callback dereferences (name pointer, aecs_comp_table, DMA address), which can be leveraged into a kernel memory read primitive.\nI:H - The freed object is passed to a function pointer callback that operates on attacker-reclaimable fields, giving heap-spray-based write primitives (including a controlled dma_free_coherent/kfree of an attacker-chosen address) that can be escalated toward control-flow hijacking.\nA:H - Even without successful exploitation, dereferencing and double-freeing the released allocation produces slab corruption, KASAN splats, or a kernel panic, taking the system down." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/crypto/intel/iaa/iaa_crypto_main.c" ], "versions": [ { "version": "b190447e0fa3ef7355480d641d078962e03768b4", "lessThan": "b5d534b473e2c8d3e4560be2dd6c12a8eb9d61e9", "status": "affected", "versionType": "git" }, { "version": "b190447e0fa3ef7355480d641d078962e03768b4", "lessThan": "c66f0be993ba52410edab06124c54ecf143b05c1", "status": "affected", "versionType": "git" }, { "version": "b190447e0fa3ef7355480d641d078962e03768b4", "lessThan": "e0d3b845a1b10b7b5abdad7ecc69d45b2aab3209", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/crypto/intel/iaa/iaa_crypto_main.c" ], "versions": [ { "version": "6.8", "status": "affected" }, { "version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.13", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.2", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.10.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.11.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b5d534b473e2c8d3e4560be2dd6c12a8eb9d61e9" }, { "url": "https://git.kernel.org/stable/c/c66f0be993ba52410edab06124c54ecf143b05c1" }, { "url": "https://git.kernel.org/stable/c/e0d3b845a1b10b7b5abdad7ecc69d45b2aab3209" } ], "title": "crypto: iaa - Fix potential use after free bug", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-47732", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-21T13:00:23.321924Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-21T13:04:15.743Z" } } ] } }