193 lines
10 KiB
JSON
193 lines
10 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-2024-47732",
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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": "2024-09-30T16:00:12.958Z",
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"datePublished": "2024-10-21T12:14:03.863Z",
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"dateUpdated": "2026-08-05T11:39:48.573Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:39:48.573Z"
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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\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. :)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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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/crypto/intel/iaa/iaa_crypto_main.c"
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],
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"versions": [
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{
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"version": "b190447e0fa3ef7355480d641d078962e03768b4",
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"lessThan": "b5d534b473e2c8d3e4560be2dd6c12a8eb9d61e9",
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"status": "affected",
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"status": "affected",
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{
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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/crypto/intel/iaa/iaa_crypto_main.c"
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],
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"versions": [
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{
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"version": "6.8",
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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": "6.8",
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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": "6.10.13",
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"lessThanOrEqual": "6.10.*",
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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": "6.11.2",
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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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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"operator": "OR",
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"versionStartIncluding": "6.8",
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"versionEndExcluding": "6.10.13"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b5d534b473e2c8d3e4560be2dd6c12a8eb9d61e9"
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},
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{
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"url": "https://git.kernel.org/stable/c/c66f0be993ba52410edab06124c54ecf143b05c1"
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},
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{
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"url": "https://git.kernel.org/stable/c/e0d3b845a1b10b7b5abdad7ecc69d45b2aab3209"
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}
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],
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"title": "crypto: iaa - Fix potential use after free bug",
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-47732",
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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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"version": "2.0.3",
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"timestamp": "2024-10-21T13:00:23.321924Z"
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],
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"title": "CISA ADP Vulnrichment",
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