{"id":"CVE-2026-68397","revision":"9416279c9fbe4553bbfff9aa72c1b804","records":[{"revision":"9416279c9fbe4553bbfff9aa72c1b804","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68397","aliases":[],"title":"net/iucv: take a reference on the socket found in afiucv_hs_rcv()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: take a reference on the socket found in afiucv_hs_rcv()\n\nafiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,\ndrops the lock, and then passes the socket to the afiucv_hs_callback_*()\nhandlers without holding a reference. AF_IUCV sockets are not\nRCU-protected and are freed synchronously by iucv_sock_kill() ->\nsock_put(), so a concurrent close can free the socket in the window\nbetween read_unlock() and the handler, which then dereferences freed\nmemory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()).\n\nTake a reference with sock_hold() while the socket is still on the list\nand release it with sock_put() once the handler has run.","state":0,"publishedAt":"2026-08-10T12:04:16.772+00:00","modifiedAt":"2026-10-19T21:09:08.287+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/iucv/af_iucv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"5739be5c19495d709d902a2912c9102ce78740d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"bc6c6e546ffff8865daaeb622ef348c2d481e80f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"e3e0679fc950191aff8f27fa78abcfc2462cff4a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"4dc0e63abf8bc7ba8892e617c1fb8b204361e022\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"1801cb20a5025a787d6853e19c38db138344b4b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"c75a950e77356e526672cba4584080c6c8b793b6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"5595ea59cdf29182cf6a270cacc1426c57b603de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3881ac441f642d56503818123446f7298442236b\",\n                            \"lessThan\": \"4fa349156043dc119721d067329714179f501749\",\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/iucv/af_iucv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5739be5c19495d709d902a2912c9102ce78740d5","https://git.kernel.org/stable/c/bc6c6e546ffff8865daaeb622ef348c2d481e80f","https://git.kernel.org/stable/c/e3e0679fc950191aff8f27fa78abcfc2462cff4a","https://git.kernel.org/stable/c/4dc0e63abf8bc7ba8892e617c1fb8b204361e022","https://git.kernel.org/stable/c/1801cb20a5025a787d6853e19c38db138344b4b4","https://git.kernel.org/stable/c/c75a950e77356e526672cba4584080c6c8b793b6","https://git.kernel.org/stable/c/5595ea59cdf29182cf6a270cacc1426c57b603de","https://git.kernel.org/stable/c/4fa349156043dc119721d067329714179f501749"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68397","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68397","identifiers":["CVE-2026-68397"]},"retained":false,"historicalAffected":[]}],"coverage":[]}