{"id":"CVE-2026-53151","summary":"rxrpc: Fix the ACK parser to extract the SACK table for parsing","details":"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 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-\u003edata 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.","modified":"2026-07-15T01:48:50.614218422Z","published":"2026-06-25T08:38:36.187Z","related":["CGA-pvc3-jq9r-xrhg"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53151.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00"},{"type":"WEB","url":"https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253"},{"type":"WEB","url":"https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/775c5e89272a2615b72bb84f611ba66fa3b7493e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53151.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53151"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d57a3a151660902091491ac2633134e1be92557f"},{"fixed":"5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1"},{"fixed":"775c5e89272a2615b72bb84f611ba66fa3b7493e"},{"fixed":"566c4c1244de50fbff1f89ff93c9d7b0fc256db4"},{"fixed":"224298450be5c04d2a6ea1c2a94669d7ebf65d00"},{"fixed":"333b6d5bb9f87827ac2639c737bf9613dbae7253"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53151.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.144"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.95"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53151.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}