{"id":"CVE-2026-98354","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mad: Fix receive buffer leak when PKey enforcement fails\n\nib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs\nib_mad_enforce_security() before …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mad: Fix receive buffer leak when PKey enforcement fails\n\nib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs\nib_mad_enforce_security() before …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 4617c9a856188674dddb0ca66979746d07688579","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 8e2036fb47a5b152d53eadbd35abf311bd34cc7f","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < bad289e42f512646a988f278f536d21547df73f1","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 752b30e9d339008e5ce7eed412e9446078916129","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 39c4ea72a40503e102ae07e6776005f96ca078a6","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 5091e25ec503f7fc02723ca435226467b68caac7","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < c0d8df85db146d6275e226cb950023be69dd6c77","Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da < 3476c28c9addfa253f505e6bd87f1f5598b961d0","Linux 4.13"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:28.883","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98354","references":[{"url":"https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.395Z","slug":"CVE-2026-98354","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mad: Fix receive buffer leak when PKey enforcement fails\n\nib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs\nib_mad_enforce_security() before linking recv_buf onto that list.  On\nfailure it calls ib_free_recv_mad(), which only walks rmpp_list and frees\nthe ib_mad_private of every buffer found there.  As the list is still\nempty at that point, nothing is freed at all.\n\nThe caller cannot clean up either: ib_mad_recv_done() sets recv to NULL\nright after ib_mad_complete_recv() returns, assuming the MAD layer took\nownership of the buffer.  Every MAD that fails the PKey check therefore\nleaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA),\nand a remote node can trigger this repeatedly by sending MADs with a\nwrong PKey.\n\nLink recv_buf onto rmpp_list right after the list is initialized, so the\nerror path has something to free.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}