{"id":"CVE-2026-52974","revision":"23c559174c94470ab7dafe91ce247dd5","records":[{"revision":"23c559174c94470ab7dafe91ce247dd5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52974","aliases":[],"title":"net: tls: fix strparser anchor skb leak on offload RX setup failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: fix strparser anchor skb leak on offload RX setup failure\n\nWhen tls_set_device_offload_rx() fails at tls_dev_add(), the error path\ncalls tls_sw_free_resources_rx() to clean up the SW context that was\ninitialized by tls_set_sw_offload(). This function calls\ntls_sw_release_resources_rx() (which stops the strparser via\ntls_strp_stop()) and tls_sw_free_ctx_rx() (which kfrees the context),\nbut never frees the anchor skb that was allocated by alloc_skb(0) in\ntls_strp_init().\n\nNote that tls_sw_free_resources_rx() is exclusively used for this\n\"failed to start offload\" code path, there's no other caller.\n\nThe leak did not exist before commit 84c61fe1a75b (\"tls: rx: do not use\nthe standard strparser\"), because the standard strparser doesn't try\nto pre-allocate an skb.\n\nThe normal close path in tls_sk_proto_close() handles cleanup by calling\ntls_sw_strparser_done() (which calls tls_strp_done()) after dropping\nthe socket lock, because tls_strp_done() does cancel_work_sync() and\nthe strparser work handler takes the socket lock.","state":0,"publishedAt":"2026-06-24T16:28:51.826+00:00","modifiedAt":"2026-10-19T19:47:11.322+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tls/tls.h\",\n                        \"net/tls/tls_strp.c\",\n                        \"net/tls/tls_sw.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"0c9f399b37ce22a5ed94cc51f03ed07ac7f38e32\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"688f12aa44511dd57e448eb670075c6302ad1dc1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"3c405dfa9619e506e75b8e41f8b29a5b99731877\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"9c54e76f8d6eb11735918777ef0e0509e089557d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"bd07fe6c38b9e44ff3fc02692a53f095c5cc9afc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c61fe1a75b4255df1e1e7c054c9e6d048da417\",\n                            \"lessThan\": \"58689498ca3384851145a754dbb1d8ed1cf9fb54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tls/tls.h\",\n                        \"net/tls/tls_strp.c\",\n                        \"net/tls/tls_sw.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.141\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.91\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.33\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0c9f399b37ce22a5ed94cc51f03ed07ac7f38e32","https://git.kernel.org/stable/c/688f12aa44511dd57e448eb670075c6302ad1dc1","https://git.kernel.org/stable/c/3c405dfa9619e506e75b8e41f8b29a5b99731877","https://git.kernel.org/stable/c/9c54e76f8d6eb11735918777ef0e0509e089557d","https://git.kernel.org/stable/c/bd07fe6c38b9e44ff3fc02692a53f095c5cc9afc","https://git.kernel.org/stable/c/58689498ca3384851145a754dbb1d8ed1cf9fb54"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52974","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52974","identifiers":["CVE-2026-52974"]},"retained":false,"historicalAffected":[]}],"coverage":[]}