{"id":"CVE-2026-53151","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix the ACK parser to extract the SACK table for parsing\n\nFix modification of the received skbuff in rxrpc_input_soft_acks() and a\npotential incorrect access of …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix the ACK parser to extract the SACK table for parsing\n\nFix modification of the received skbuff in rxrpc_input_soft_acks() and a\npotential incorrect access of …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","published":"2026-06-25","updated":"2026-07-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53151","references":[{"url":"https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/775c5e89272a2615b72bb84f611ba66fa3b7493e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00457,"epssPercentile":0.38847,"ingestedAt":"2026-07-04T12:56:09.627Z","slug":"CVE-2026-53151","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix the ACK parser to extract the SACK table for parsing\n\nFix modification of the received skbuff in rxrpc_input_soft_acks() and a\npotential incorrect access of the buffer in a fragmented UDP packet (the\npacket would probably have to be deliberately pre-generated as fragmented)\nwhen AF_RXRPC tries to extract the contents of the SACK table by copying\nout the contents of the SACK table into a buffer before attempting to parse\n\nAF_RXRPC assumes that it can just call skb_condense() and then validly\naccess the SACK table from skb->data and that it will be a flat buffer -\nbut skb_condense() can silently fail to do anything under some\ncircumstances.\n\nNote that whilst rxrpc_input_soft_acks() should be able to parse extended\nACKs, the rest of AF_RXRPC doesn't currently support that.\n\nFurther, there's then no need to call skb_condense() in rxrpc_input_ack(),\nso don't.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}