159 lines
8.9 KiB
JSON
159 lines
8.9 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-2026-90423",
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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": "2026-09-11T19:38:34.814Z",
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"datePublished": "2026-09-17T16:09:46.513Z",
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"dateUpdated": "2026-10-19T09:03:27.119Z"
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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": "2026-10-19T09:03:27.119Z"
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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/rxe: Fix UAF in ODP init error-handling path\n\nrxe_odp_mr_init_user() stores &umem_odp->umem in mr->umem before\ncalling rxe_odp_init_pages(). If rxe_odp_init_pages() fails,\nrxe_odp_mr_init_user() releases umem_odp and returns an error.\n\nrxe_reg_user_mr() then unwinds the error through rxe_cleanup(),\nrxe_mr_cleanup(), ib_umem_release(mr->umem). There is an\nIS_ERR_OR_NULL(umem) check at the start of ib_umem_release().\nBut since mr->umem is NOT reset to NULL in the error handling\npath of rxe_odp_mr_init_user(), the check passes and it reads\nalready-freed fields like umem->is_dmabuf, causing UAF.\n\nFix the UAF by clearing mr->umem after releasing the failed\nODP umem so the MR cleanup path does not release it again."
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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 attacker-controlled bytes are cmd.access_flags (IB_ACCESS_ON_DEMAND), cmd.start and cmd.length from IB_USER_VERBS_CMD_REG_MR written to /dev/infiniband/uverbsN; ib_uverbs_write→ib_uverbs_reg_mr→rxe_reg_user_mr→rxe_odp_mr_init_user. Soft-RoCE packet receive never supplies that REG_MR command.\nAC:L - rxe_odp_init_pages() fails when ib_umem_odp_map_dma_and_lock() returns an error from hmm_range_fault(); a second thread in the same process can munmap the REG_MR VA so rxe_ib_invalidate_range() keeps invalidating the mmu_interval until HMM_RANGE_DEFAULT_TIMEOUT (1000ms) expires with -EBUSY. The UAF on that error path is then deterministic.\nPR:L - uverbs_devnode() publishes /dev/infiniband/uverbs* as 0666; ib_uverbs_open, ib_uverbs_get_context, ib_uverbs_alloc_pd and ib_uverbs_reg_mr have no capability checks, and rxe_init_device_param sets IBK_ON_DEMAND_PAGING so ib_check_mr_access() accepts IB_ACCESS_ON_DEMAND.\nUI:N - The attacker opens uverbs, allocates a PD, and issues REG_MR with IB_ACCESS_ON_DEMAND against a VA range they own; no other user must mount, open, or confirm anything.\nS:U - rxe_mr_cleanup() calls ib_umem_release() on the dangling mr->umem inside the same host kernel; this does not cross a KVM, Xen, or IOMMU boundary.\nC:H - After ib_umem_odp_release() kfree's umem_odp, ib_umem_release(mr->umem) reads the freed umem->is_dmabuf and umem->is_odp; slab reuse lets the attacker control those flags and later pointers such as ibdev and owning_mm.\nI:H - The dangling mr->umem still has is_odp set, so ib_umem_release() calls ib_umem_odp_release() again and kfree's the already-freed umem_odp, a heap double-free write primitive.\nA:H - The UAF load of umem->is_dmabuf in ib_umem_release() and the second free of umem_odp oops or KASAN-crash the kernel."
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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/sw/rxe/rxe_odp.c"
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],
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"versions": [
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{
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"version": "d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91",
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"lessThan": "5f1933163327c9f1c8f2a341c6cb551aaf231ff9",
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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": "d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91",
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"lessThan": "4cfb448705da3171d44d9cbe7be53ff03284d532",
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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": "d03fb5c6599e31b90c6b5f65d43d6ccc6b49eb91",
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"lessThan": "51f2c8d2c99fc1f452f7113c08a35edcc4bf8732",
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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/sw/rxe/rxe_odp.c"
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],
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"versions": [
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{
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"version": "6.15",
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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": "6.15",
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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": "6.18.52",
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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": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "6.15",
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"versionEndExcluding": "6.18.52"
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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": "6.15",
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"versionEndExcluding": "7.2.6"
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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": "6.15",
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"versionEndExcluding": "7.3"
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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/5f1933163327c9f1c8f2a341c6cb551aaf231ff9"
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},
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{
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"url": "https://git.kernel.org/stable/c/4cfb448705da3171d44d9cbe7be53ff03284d532"
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},
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{
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"url": "https://git.kernel.org/stable/c/51f2c8d2c99fc1f452f7113c08a35edcc4bf8732"
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}
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],
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"title": "RDMA/rxe: Fix UAF in ODP init error-handling path",
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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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}
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} |