220 lines
12 KiB
JSON
220 lines
12 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-2026-80693",
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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": "2026-08-26T14:34:25.785Z",
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"datePublished": "2026-08-28T06:52:56.131Z",
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"dateUpdated": "2026-10-21T12:46:53.892Z"
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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": "2026-10-21T12:46:53.892Z"
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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\nidpf: bound interrupt-vector register fill to the allocated array\n\nidpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from\nthe VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter->req_vec_chunks, bounding\nits inner loop only by the per-chunk num_vectors. The array is sized\nseparately: idpf_intr_reg_init() allocates\nkzalloc_objs(struct idpf_vec_regs, total_vecs) from\ncaps.num_allocated_vectors and only checks the returned count after the\nfill. The sum of per-chunk num_vectors is never reconciled against\ntotal_vecs, so a reply with a small num_allocated_vectors but chunks\nsumming higher writes past the end of reg_vals[].\n\nImpact: a control plane (a PF or hypervisor device model) that returns a\nVIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds\nnum_allocated_vectors writes struct idpf_vec_regs entries past the end of\nthe reg_vals kmalloc allocation (KASAN slab-out-of-bounds write).\n\nBound the fill loop to the array capacity passed in by the callers,\nmirroring the sibling idpf_vport_get_q_reg(). The existing\nnum_regs < num_vecs check then rejects an undersized reply without the\nout-of-bounds write happening first."
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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:N/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 9.3,
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"baseSeverity": "CRITICAL"
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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 bug is reached only when the idpf driver processes a VIRTCHNL2_OP_ALLOC_VECTORS reply over the PCIe virtchnl/mailbox control queue during idpf_vc_core_init()/idpf_vport_intr_init(); there is no network packet, syscall, or netlink path into idpf_get_reg_intr_vecs().\nAC:L - A malicious control plane fully controls GET_CAPS num_allocated_vectors and per-chunk num_vectors in the ALLOC_VECTORS reply, so the slab out-of-bounds write is deterministic on driver init or hardware-reset re-init without races or attacker-uncontrollable memory layout.\nPR:N - Exploitation requires no credentials on the victim OS; a malicious PF, hypervisor device model, or NIC firmware can inject the crafted virtchnl reply during probe/reset before any local user action, including in cloud VMs where tenants never administer the control plane.\nUI:N - No victim interaction is required beyond normal driver bring-up; cloud and server images auto-probe the Intel idpf PF/VF and open netdevs at boot, so the attacker need not wait for a user to mount, click, or manually configure the interface.\nS:C - The attack crosses the SR-IOV/virtio control-plane boundary: a hypervisor or device firmware outside the guest/host kernel trust domain corrupts kernel heap memory inside the idpf driver security authority, matching other virtchnl isolation-breaker CVEs.\nC:H - The flaw is a kmalloc slab out-of-bounds write of attacker-influenced struct idpf_vec_regs entries (dyn_ctl_reg, itrn_reg, itrn_index_spacing); such heap corruption can disclose adjacent slab objects and be groomed into an arbitrary kernel read primitive.\nI:H - Each overfilled entry writes 12 bytes of control-plane-supplied register metadata past reg_vals[], giving a repeatable heap overflow primitive that can corrupt adjacent allocations and be leveraged for control-flow hijack or privilege escalation in the victim kernel.\nA:H - Writing far beyond the reg_vals[] allocation corrupts slab metadata or adjacent kernel objects and can immediately oops/panic the host or guest kernel; hardware-reset recovery re-enters idpf_vc_core_init(), allowing repeated crash or re-exploitation attempts."
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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/net/ethernet/intel/idpf/idpf_dev.c",
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"drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
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"drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
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"drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
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],
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"versions": [
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{
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"version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
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"lessThan": "a6447b6a9678e701ca4d32789f311067cf528c2d",
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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": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
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"lessThan": "e299b7d1334ebec4d43a7bb697d10c12df1aaed3",
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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": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
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"lessThan": "41bb8748124d0d8ee5d8e1eace9dfbc874bc9564",
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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": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
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"lessThan": "9f7007ee9858c99aa43101bc8352c672fee85644",
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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/net/ethernet/intel/idpf/idpf_dev.c",
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"drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
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"drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
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"drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
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],
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"versions": [
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{
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"version": "6.7",
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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": "6.7",
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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": "6.12.114",
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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": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.7",
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"versionEndExcluding": "6.12.114"
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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": "6.7",
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"versionEndExcluding": "6.18.57"
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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": "6.7",
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"versionEndExcluding": "7.1.8"
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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": "6.7",
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"versionEndExcluding": "7.2"
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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/a6447b6a9678e701ca4d32789f311067cf528c2d"
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},
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{
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"url": "https://git.kernel.org/stable/c/e299b7d1334ebec4d43a7bb697d10c12df1aaed3"
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},
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{
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"url": "https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644"
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}
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],
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"title": "idpf: bound interrupt-vector register fill to the allocated array",
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-80693",
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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": "2026-10-16T19:20:11.642760Z"
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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": "2026-10-16T19:26:33.729Z"
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}
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}
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]
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}
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} |