174 lines
9.7 KiB
JSON
174 lines
9.7 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-2026-72465",
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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": "2026-08-09T03:40:39.933Z",
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"datePublished": "2026-08-15T05:57:08.767Z",
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"dateUpdated": "2026-08-17T05:44:31.793Z"
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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": "2026-08-17T05:44:31.793Z"
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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\nxprtrdma: Sanitize the reply credit grant after parsing\n\nThe out_norqst exit in rpcrdma_reply_handler() branches away before\nthe credit clamp, so a reply that matches no pending request reaches\nout_post carrying the raw credit value parsed from the wire.\nrpcrdma_post_recvs() does not bound its @needed argument: the refill\nloop allocates and chains Receive WRs until the count is satisfied or\nallocation fails. A peer that sends a well-formed reply carrying an\nunknown XID and an inflated credit grant therefore drives rep\nallocation and Receive posting past re_max_requests on every such\nreply.\n\nMove the clamp to immediately after the credit field is parsed,\nahead of the first branch that can reach out_post, so every later\nconsumer sees a sanitized value. The cwnd update stays on the\nmatched-request path."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - The flaw is in the NFS-over-RDMA client receive path: rpcrdma_wc_receive() delivers remote RDMA reply completions to rpcrdma_reply_handler(), so a malicious or compromised NFS/RDMA server can send crafted replies over InfiniBand/RoCE/iWARP without local access.\nAC:L - On an established RPC/RDMA session the peer fully controls inbound replies and can reliably send well-formed headers with an unknown XID and an inflated credit grant on every message, deterministically reaching out_norqst and out_post without races or special victim state.\nPR:N - Exploitation requires only network reachability as the connected RDMA/RPC peer; the attacker does not need local accounts, mount privileges, or namespaced capabilities on the victim NFS client to deliver malicious reply traffic.\nUI:N - Once an NFS-over-RDMA mount and transport session exist, the attacker can flood spurious replies during normal client-server communication without any additional victim or administrator action at exploit time.\nS:U - Impact is confined to excessive kernel memory allocation and denial of service within the NFS client's SUNRPC/xprtrdma transport; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The bug is unbounded receive-buffer allocation driven by an unsanitized wire credit field, not an out-of-bounds read, use-after-free, or other memory disclosure primitive that exposes kernel data to the attacker.\nI:N - Inflated credits only cause rpcrdma_post_recvs() to allocate and post extra rpcrdma_rep objects; there is no demonstrated memory corruption, arbitrary write, or control-flow hijack primitive.\nA:H - Each spurious reply can drive rpcrdma_rep_create() far past re_max_requests until allocation fails, enabling repeated remote kernel memory exhaustion, OOM conditions, and loss of NFS-over-RDMA service on the client."
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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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"net/sunrpc/xprtrdma/rpc_rdma.c"
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],
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"versions": [
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{
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"version": "d01d6670c169316115b26dfb3585a73dfe40b563",
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"lessThan": "7cf332b3d82d73ffceedca6b4a120be074172021",
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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": "d1b159356a3584943192712392fcb2439aafb8c1",
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"lessThan": "41634242140173eabbf54f899f9c70b5c685e786",
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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": "17da9e0caa8615f6fc3b4022eadbd78a9aea1a2a",
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"lessThan": "8be1bb378def94a5cb8f7527a191e476407118ec",
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"status": "affected",
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{
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"lessThan": "469b22376ee73369711ecf2761bd122ef4195963",
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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": "704f3f640f72db4d44ec5ce3db8d4e150c974bc7",
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"lessThan": "c3a628aab2dc8f5fd7bff86ceaeae64de590e60a",
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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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"net/sunrpc/xprtrdma/rpc_rdma.c"
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],
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"versions": [
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{
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"version": "7.1",
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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": "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": "7.1.5",
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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": "7.1",
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"versionEndExcluding": "7.1.5"
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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": "7.1",
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7cf332b3d82d73ffceedca6b4a120be074172021"
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},
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{
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"url": "https://git.kernel.org/stable/c/41634242140173eabbf54f899f9c70b5c685e786"
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},
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{
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"url": "https://git.kernel.org/stable/c/8be1bb378def94a5cb8f7527a191e476407118ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/469b22376ee73369711ecf2761bd122ef4195963"
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{
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"url": "https://git.kernel.org/stable/c/33db78b1b24fc6a464ae08aa4d2538c5f883eb5e"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3a628aab2dc8f5fd7bff86ceaeae64de590e60a"
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}
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],
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"title": "xprtrdma: Sanitize the reply credit grant after parsing",
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"x_generator": {
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} |