{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2024-46789", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.278Z", "datePublished": "2024-09-18T07:12:45.154Z", "dateUpdated": "2024-09-29T14:25:36.916Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-09-18T07:12:45.154Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slub: add check for s->flags in the alloc_tagging_slab_free_hook\n\nWhen enable CONFIG_MEMCG & CONFIG_KFENCE & CONFIG_KMEMLEAK, the following\nwarning always occurs,This is because the following call stack occurred:\nmem_pool_alloc\n kmem_cache_alloc_noprof\n slab_alloc_node\n kfence_alloc\n\nOnce the kfence allocation is successful,slab->obj_exts will not be empty,\nbecause it has already been assigned a value in kfence_init_pool.\n\nSince in the prepare_slab_obj_exts_hook function,we perform a check for\ns->flags & (SLAB_NO_OBJ_EXT | SLAB_NOLEAKTRACE),the alloc_tag_add function\nwill not be called as a result.Therefore,ref->ct remains NULL.\n\nHowever,when we call mem_pool_free,since obj_ext is not empty, it\neventually leads to the alloc_tag_sub scenario being invoked. This is\nwhere the warning occurs.\n\nSo we should add corresponding checks in the alloc_tagging_slab_free_hook.\nFor __GFP_NO_OBJ_EXT case,I didn't see the specific case where it's using\nkfence,so I won't add the corresponding check in\nalloc_tagging_slab_free_hook for now.\n\n[ 3.734349] ------------[ cut here ]------------\n[ 3.734807] alloc_tag was not set\n[ 3.735129] WARNING: CPU: 4 PID: 40 at ./include/linux/alloc_tag.h:130 kmem_cache_free+0x444/0x574\n[ 3.735866] Modules linked in: autofs4\n[ 3.736211] CPU: 4 UID: 0 PID: 40 Comm: ksoftirqd/4 Tainted: G W 6.11.0-rc3-dirty #1\n[ 3.736969] Tainted: [W]=WARN\n[ 3.737258] Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n[ 3.737875] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 3.738501] pc : kmem_cache_free+0x444/0x574\n[ 3.738951] lr : kmem_cache_free+0x444/0x574\n[ 3.739361] sp : ffff80008357bb60\n[ 3.739693] x29: ffff80008357bb70 x28: 0000000000000000 x27: 0000000000000000\n[ 3.740338] x26: ffff80008207f000 x25: ffff000b2eb2fd60 x24: ffff0000c0005700\n[ 3.740982] x23: ffff8000804229e4 x22: ffff800082080000 x21: ffff800081756000\n[ 3.741630] x20: fffffd7ff8253360 x19: 00000000000000a8 x18: ffffffffffffffff\n[ 3.742274] x17: ffff800ab327f000 x16: ffff800083398000 x15: ffff800081756df0\n[ 3.742919] x14: 0000000000000000 x13: 205d344320202020 x12: 5b5d373038343337\n[ 3.743560] x11: ffff80008357b650 x10: 000000000000005d x9 : 00000000ffffffd0\n[ 3.744231] x8 : 7f7f7f7f7f7f7f7f x7 : ffff80008237bad0 x6 : c0000000ffff7fff\n[ 3.744907] x5 : ffff80008237ba78 x4 : ffff8000820bbad0 x3 : 0000000000000001\n[ 3.745580] x2 : 68d66547c09f7800 x1 : 68d66547c09f7800 x0 : 0000000000000000\n[ 3.746255] Call trace:\n[ 3.746530] kmem_cache_free+0x444/0x574\n[ 3.746931] mem_pool_free+0x44/0xf4\n[ 3.747306] free_object_rcu+0xc8/0xdc\n[ 3.747693] rcu_do_batch+0x234/0x8a4\n[ 3.748075] rcu_core+0x230/0x3e4\n[ 3.748424] rcu_core_si+0x14/0x1c\n[ 3.748780] handle_softirqs+0x134/0x378\n[ 3.749189] run_ksoftirqd+0x70/0x9c\n[ 3.749560] smpboot_thread_fn+0x148/0x22c\n[ 3.749978] kthread+0x10c/0x118\n[ 3.750323] ret_from_fork+0x10/0x20\n[ 3.750696] ---[ end trace 0000000000000000 ]---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/slub.c" ], "versions": [ { "version": "4b8736964640", "lessThan": "2d476c86ba47", "status": "affected", "versionType": "git" }, { "version": "4b8736964640", "lessThan": "ab7ca09520e9", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/slub.c" ], "versions": [ { "version": "6.10", "status": "affected" }, { "version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "custom" }, { "version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2d476c86ba4745fcbc912ce4627df4fa80caa9ad" }, { "url": "https://git.kernel.org/stable/c/ab7ca09520e9c41c219a4427fe0dae24024bfe7f" } ], "title": "mm/slub: add check for s->flags in the alloc_tagging_slab_free_hook", "x_generator": { "engine": "bippy-c9c4e1df01b2" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T14:24:16.008606Z", "id": "CVE-2024-46789", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:25:36.916Z" } } ] } }