263 lines
16 KiB
JSON
263 lines
16 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-2025-21714",
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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": "2024-12-29T08:45:45.752Z",
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"datePublished": "2025-02-27T02:07:25.570Z",
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"dateUpdated": "2026-10-30T12:20:44.954Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:20:44.954Z"
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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\nRDMA/mlx5: Fix implicit ODP use after free\n\nPrevent double queueing of implicit ODP mr destroy work by using\n__xa_cmpxchg() to make sure this is the only time we are destroying this\nspecific mr.\n\nWithout this change, we could try to invalidate this mr twice, which in\nturn could result in queuing a MR work destroy twice, and eventually the\nsecond work could execute after the MR was freed due to the first work,\ncausing a user after free and trace below.\n\n refcount_t: underflow; use-after-free.\n WARNING: CPU: 2 PID: 12178 at lib/refcount.c:28 refcount_warn_saturate+0x12b/0x130\n Modules linked in: bonding ib_ipoib vfio_pci ip_gre geneve nf_tables ip6_gre gre ip6_tunnel tunnel6 ipip tunnel4 ib_umad rdma_ucm mlx5_vfio_pci vfio_pci_core vfio_iommu_type1 mlx5_ib vfio ib_uverbs mlx5_core iptable_raw openvswitch nsh rpcrdma ib_iser libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_cm ib_core xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_nat nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay zram zsmalloc fuse [last unloaded: ib_uverbs]\n CPU: 2 PID: 12178 Comm: kworker/u20:5 Not tainted 6.5.0-rc1_net_next_mlx5_58c644e #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Workqueue: events_unbound free_implicit_child_mr_work [mlx5_ib]\n RIP: 0010:refcount_warn_saturate+0x12b/0x130\n Code: 48 c7 c7 38 95 2a 82 c6 05 bc c6 fe 00 01 e8 0c 66 aa ff 0f 0b 5b c3 48 c7 c7 e0 94 2a 82 c6 05 a7 c6 fe 00 01 e8 f5 65 aa ff <0f> 0b 5b c3 90 8b 07 3d 00 00 00 c0 74 12 83 f8 01 74 13 8d 50 ff\n RSP: 0018:ffff8881008e3e40 EFLAGS: 00010286\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027\n RDX: ffff88852c91b5c8 RSI: 0000000000000001 RDI: ffff88852c91b5c0\n RBP: ffff8881dacd4e00 R08: 00000000ffffffff R09: 0000000000000019\n R10: 000000000000072e R11: 0000000063666572 R12: ffff88812bfd9e00\n R13: ffff8881c792d200 R14: ffff88810011c005 R15: ffff8881002099c0\n FS: 0000000000000000(0000) GS:ffff88852c900000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f5694b5e000 CR3: 00000001153f6003 CR4: 0000000000370ea0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n ? refcount_warn_saturate+0x12b/0x130\n free_implicit_child_mr_work+0x180/0x1b0 [mlx5_ib]\n process_one_work+0x1cc/0x3c0\n worker_thread+0x218/0x3c0\n kthread+0xc6/0xf0\n ret_from_fork+0x1f/0x30\n </TASK>"
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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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 attack requires local access to the RDMA verbs uAPI (/dev/infiniband/uverbs*) to register an implicit ODP MR, and the invalidation half of the race requires local mm operations (munmap/madvise) that a remote peer cannot induce. Remote RDMA traffic can drive the page-fault half but not the whole race, so the vector is Local.\nAC:L - The attacker controls both sides of the race from its own process — repeated ibv_advise_mr prefetch faults on the implicit MR in one thread and munmap/MADV_DONTNEED invalidations of the same range in another — and can retry the loop indefinitely on many child MRs in parallel. No condition depends on state outside the attacker's influence.\nPR:L - An unprivileged local account with access to the InfiniBand verbs character device suffices; there is no capability check anywhere on the reg_mr/ODP/prefetch path (only CAP_NET_RAW for raw QPs and CAP_IPC_LOCK for pinning, neither of which applies to ODP). Unprivileged verbs access is the intended design of RDMA and is routine in HPC, RoCE cloud, and containerized deployments.\nUI:N - The attacking process registers its own implicit ODP MR and triggers both the page faults and the invalidations itself. No victim action or cooperation is needed.\nS:U - The corruption is confined to kernel memory managed by the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. Standard kernel-local privilege escalation scope.\nC:H - The second execution of free_implicit_child_mr_work() operates on a freed, kzalloc'd mlx5_ib_mr from a generic kmalloc slab, so an attacker who reclaims the object controls mr->parent, mr->umem, and mr->mmkey and can turn the dereferences into arbitrary kernel reads. Destroying an mkey number that has been reassigned can additionally expose another RDMA consumer's registered memory.\nI:H - The double queue_work yields a use-after-free plus a double mlx5_ib_dereg_mr() free, and INIT_WORK() on an already-pending work item corrupts workqueue linked lists — both classic paths to a controlled write primitive and control-flow hijack via heap spraying.\nA:H - Even unweaponized, the bug produces the refcount_t underflow WARNING and subsequent oops shown in the commit trace, and the underflowed usecount can leave mlx5r_deref_wait_odp_mkey() waiting forever, hanging an unbound workqueue worker. Any of these is a full availability loss."
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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/infiniband/hw/mlx5/odp.c"
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],
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"versions": [
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{
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"version": "5256edcb98a14b11409a2d323f56a70a8b366363",
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"lessThan": "032f3f799fdb807a21467b7dc7d620395a735e2b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5256edcb98a14b11409a2d323f56a70a8b366363",
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"lessThan": "a306dfff6b76aafa264ad33874a8992a8d5858b7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5256edcb98a14b11409a2d323f56a70a8b366363",
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"lessThan": "7cc8f681f6d4ae4478ae0f60485fc768f2b450da",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5256edcb98a14b11409a2d323f56a70a8b366363",
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"lessThan": "edfb65dbb9ffd3102f3ff4dd21316158e56f1976",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5256edcb98a14b11409a2d323f56a70a8b366363",
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"lessThan": "d3d930411ce390e532470194296658a960887773",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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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/infiniband/hw/mlx5/odp.c"
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],
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"versions": [
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{
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"version": "5.5",
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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": "5.5",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.13",
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"lessThanOrEqual": "6.12.*",
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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": "6.13.2",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.5",
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"versionEndExcluding": "6.1.191"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.5",
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"versionEndExcluding": "6.14"
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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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{
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"url": "https://git.kernel.org/stable/c/032f3f799fdb807a21467b7dc7d620395a735e2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/a306dfff6b76aafa264ad33874a8992a8d5858b7"
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},
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{
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"url": "https://git.kernel.org/stable/c/7cc8f681f6d4ae4478ae0f60485fc768f2b450da"
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},
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{
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"url": "https://git.kernel.org/stable/c/edfb65dbb9ffd3102f3ff4dd21316158e56f1976"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3d930411ce390e532470194296658a960887773"
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}
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],
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"title": "RDMA/mlx5: Fix implicit ODP use after free",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-21714",
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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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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-02-27T18:14:41.666348Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-02-27T18:22:30.244Z"
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}
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}
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]
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}
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} |