259 lines
13 KiB
JSON
259 lines
13 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-2026-52908",
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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": "2026-06-09T07:44:35.366Z",
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"datePublished": "2026-06-19T14:00:35.971Z",
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"dateUpdated": "2026-10-19T19:36:59.343Z"
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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": "2026-08-05T12:31:31.552Z"
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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: During rereg_mr ensure that REREG_ACCESS is compatible\n\nIf IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be\nre-evaluated to ensure it is properly pinned as RW. Since the umem is\nhidden inside each driver's mr struct add a ib_umem_check_rereg() function\nthat each driver has to call before processing IB_MR_REREG_ACCESS.\n\nmlx4 has to retain its duplicate ib_access_writable check because it\nimplements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items\nin place sequentially while the MR is live, so it will continue to not\nsupport this combination."
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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 vulnerable path is reached through local RDMA uverbs write/ioctl operations on /dev/infiniband/uverbs*, not by unauthenticated network packets. Remote RDMA traffic may perform the final write only after a local process has created and reregistered the MR.\nAC:L - The trigger is a deterministic sequence: register an MR read-only, reregister it with writable access without changing translation, then use the writable MR. There is no race or attacker-uncontrolled timing requirement.\nPR:L - A basic local user can open the uverbs device when an RDMA device is exposed and create the required context, PD, and MR; the path has no CAP_SYS_ADMIN or CAP_NET_ADMIN gate. Resource limits may constrain size but do not make the attack require administrator privileges.\nUI:N - No victim action is required after the attacker has local execution and access to the RDMA uverbs device. The attacker drives the registration, reregistration, and write operations directly.\nS:U - The impact remains within the kernel/host security authority and is a local privilege escalation or host integrity violation. It does not inherently cross a VM, hypervisor, or IOMMU security boundary.\nC:H - The stale read-only pin can be converted into a writable RDMA mapping, enabling modification of read-only/COW or page-cache backed memory in a Dirty-COW-like way. A plausible privileged-code-execution path through corrupted executable page cache yields full confidentiality impact.\nI:H - The bug creates an unauthorized write primitive to pages that were not pinned with FOLL_WRITE and should not be writable. This can corrupt read-only user mappings or shared page-cache contents, making high integrity impact defensible.\nA:H - The same unauthorized write primitive can corrupt executable/library page cache or process memory and crash privileged services or destabilize the system. With plausible root code execution, high availability impact is also defensible."
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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/core/umem.c",
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"drivers/infiniband/hw/hns/hns_roce_mr.c",
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"drivers/infiniband/hw/irdma/verbs.c",
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"drivers/infiniband/hw/mlx4/mr.c",
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"drivers/infiniband/hw/mlx5/mr.c",
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"drivers/infiniband/sw/rxe/rxe_verbs.c",
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"include/rdma/ib_umem.h"
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],
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"versions": [
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{
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"version": "b40656aa7d559adc1fe689396dc58b92a9a27286",
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"lessThan": "09dc18894148381d3bfc550083b1236043870dce",
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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": "b40656aa7d559adc1fe689396dc58b92a9a27286",
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"lessThan": "eba5df21eda0fe7418efbea2f799f8ea1b8ca94c",
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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": "b40656aa7d559adc1fe689396dc58b92a9a27286",
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"lessThan": "2904e985a2917b5dac65df82733065e78a65fc9d",
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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": "b40656aa7d559adc1fe689396dc58b92a9a27286",
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"lessThan": "50334a05a950840b39a1ce3d2a173b4183db9b3e",
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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": "b40656aa7d559adc1fe689396dc58b92a9a27286",
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"lessThan": "badad6fad60def1b9805559dd81dbab3d97b82aa",
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"status": "affected",
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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/core/umem.c",
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"drivers/infiniband/hw/hns/hns_roce_mr.c",
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"drivers/infiniband/hw/irdma/verbs.c",
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"drivers/infiniband/hw/mlx4/mr.c",
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"drivers/infiniband/hw/mlx5/mr.c",
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"drivers/infiniband/sw/rxe/rxe_verbs.c",
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"include/rdma/ib_umem.h"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "6.6.143",
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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": "6.12.94",
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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": "6.18.36",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.2",
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"versionEndExcluding": "6.6.143"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/09dc18894148381d3bfc550083b1236043870dce"
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},
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{
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"url": "https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"
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},
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{
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"url": "https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d"
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},
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{
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"url": "https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e"
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},
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{
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"url": "https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa"
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}
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],
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"title": "RDMA: During rereg_mr ensure that REREG_ACCESS is compatible",
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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-2026-52908",
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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": "2026-10-16T15:22:22.777962Z"
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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-285",
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"description": "CWE-285 Improper Authorization"
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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": "2026-10-19T19:36:59.343Z"
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}
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}
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]
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}
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} |