{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38287","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.000Z","datePublished":"2025-07-10T07:42:04.056Z","dateUpdated":"2026-08-05T12:00:59.136Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:00:59.136Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/cm: Drop lockdep assert and WARN when freeing old msg\n\nThe send completion handler can run after cm_id has advanced to another\nmessage.  The cm_id lock is not needed in this case, but a recent change\nre-used cm_free_priv_msg(), which asserts that the lock is held and\nWARNs if the cm_id's currently outstanding msg is different than the one\nbeing freed."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable path is entered from `cm_send_handler()`, driven by CM MADs received from a remote RDMA peer (RTU/REP/REJ/DREQ/DREP cancel the outstanding private MAD), against in-kernel RDMA listeners such as nvmet-rdma, nfsd/RDMA or SMB Direct. Under RoCEv2 these CM MADs are carried in IP-routable UDP/4791 traffic, so the attacker need not share an L2 segment.\nAC:L - The attacker controls both halves of the race — the `ib_cancel_mad()` that defers the flush completion (by sending RTU/DREP/REJ) and the subsequent private-MAD allocation (by forcing a disconnect/DREQ) — and can open many parallel connections to saturate the MAD workqueue and retry indefinitely until the ordering inverts.\nPR:N - IB CM connection establishment (REQ/REP/RTU/DREQ) completes entirely before any ULP-level authentication such as NVMe-oF or SMB, so an unauthenticated peer on the fabric can drive the victim cm_id through the required state transitions.\nUI:N - The state transitions are performed by the kernel CM state machine in response to attacker-supplied MADs and workqueue-deferred send completions; no action by any local user is required.\nS:U - The WARN and lockdep assert fire inside the kernel's own IB CM code and affect only the kernel's security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:N - The buggy path frees the message identically to the fixed path — no out-of-bounds read, no use-after-free, no uninitialized data exposure. The WARN backtrace goes only to dmesg with hashed pointers, which the triggering remote attacker cannot observe.\nI:N - The `WARN_ON()` guard suppresses the erroneous `cm_id_priv->msg = NULL` store, and the AH destroy, cm_id deref and MAD free are all correct, so no kernel state or memory is corrupted.\nA:H - Each occurrence emits a `WARN_ON()` splat (plus a lockdep splat on PROVE_LOCKING kernels) that taints the kernel and is a full panic on the many hardened deployments running `panic_on_warn=1`; the attacker can trigger it repeatedly at will."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cm.c"],"versions":[{"version":"1e5159219076ddb2e44338c667c83fd1bd43dfef","lessThan":"fc096a0cd2017cb0aa1e7fb83131410af9283910","status":"affected","versionType":"git"},{"version":"1e5159219076ddb2e44338c667c83fd1bd43dfef","lessThan":"7590649ee7af381a9d1153143026dec124c5798e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cm.c"],"versions":[{"version":"6.13","status":"affected"},{"version":"0","lessThan":"6.13","status":"unaffected","versionType":"semver"},{"version":"6.15.3","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.15.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/fc096a0cd2017cb0aa1e7fb83131410af9283910"},{"url":"https://git.kernel.org/stable/c/7590649ee7af381a9d1153143026dec124c5798e"}],"title":"IB/cm: Drop lockdep assert and WARN when freeing old msg","x_generator":{"engine":"bippy-1.2.0"}}}}