{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89529","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.719Z","datePublished":"2026-09-11T19:44:09.259Z","dateUpdated":"2026-09-11T19:44:09.259Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-11T19:44:09.259Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reject oversized Read segments at decode time\n\nThe RPC/RDMA Read list decoder stores wire-supplied segment\nlengths without validation. xdr_count_read_segments() checks\n4-byte alignment for non-zero position values but does not\ncap the segment length.\n\nAn oversized rs_length reaches svc_rdma_build_read_segment(),\nwhich derives nr_bvec from it and can drive a large dynamic\nbvec allocation before verifying that enough rq_pages remain.\nIf the post-allocation page-overrun guard fires, the freshly\nacquired rw context is not returned, leaking the resource.\n\nReject any segment whose length exceeds the receive context's\npage budget during Read list decoding, consistent with how\nxdr_check_write_chunk() bounds Write segment counts against\nrc_maxpages. Also return the rw context on the existing\npost-allocation overrun path in svc_rdma_build_read_segment(),\nkeeping that defensive guard balanced."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c","net/sunrpc/xprtrdma/svc_rdma_rw.c"],"versions":[{"version":"5ee62b4a91137557ee4b09d1604f1dfd0b4344a8","lessThan":"5120fe54e0e2f5b62797a432115cc61d61117a5b","status":"affected","versionType":"git"},{"version":"5ee62b4a91137557ee4b09d1604f1dfd0b4344a8","lessThan":"af6f0e06bed818ee7fc8b869915964410020a1c5","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c","net/sunrpc/xprtrdma/svc_rdma_rw.c"],"versions":[{"version":"7.0","status":"affected"},{"version":"0","lessThan":"7.0","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"7.0","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5120fe54e0e2f5b62797a432115cc61d61117a5b"},{"url":"https://git.kernel.org/stable/c/af6f0e06bed818ee7fc8b869915964410020a1c5"}],"title":"svcrdma: Reject oversized Read segments at decode time","x_generator":{"engine":"bippy-1.2.0"}}}}