{"id":"CVE-2026-93098","revision":"9ffbee47161344b991b29b63c88e72dc","records":[{"revision":"9ffbee47161344b991b29b63c88e72dc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93098","aliases":[],"title":"rpmsg: glink: fix deadlock in endpoint destroy during driver detach","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: glink: fix deadlock in endpoint destroy during driver detach\n\nDuring driver detach, the device core holds the device mutex throughout\nthe driver's remove callback chain.  When the rpmsg endpoint is\ndestroyed as part of that teardown, the GLINK endpoint destroy\nimplementation attempts to unregister the underlying rpmsg device.\nThat unregistration calls device_del(), which tries to re-acquire the\nsame device mutex already held higher up the stack, causing rmmod to\nhang indefinitely.\n\nThe deadlock manifests with the following call chain:\n\n[<0>] device_del+0x44/0x414\u2003\u2003<- tries to acquire same mutex\n[<0>] device_unregister+0x18/0x34\n[<0>] rpmsg_unregister_device+0x28/0x4c\n[<0>] qcom_glink_remove_rpmsg_device+0x70/0xc0\n[<0>] qcom_glink_destroy_ept+0x58/0xbc\n[<0>] rpmsg_dev_remove+0x50/0x60\n[<0>] device_remove+0x4c/0x80\n[<0>] device_release_driver_internal+0x1cc/0x228  <- acquires device mutex\n[<0>] driver_detach+0x4c/0x98\n[<0>] bus_remove_driver+0x6c/0xbc\n[<0>] driver_unregister+0x30/0x60\n[<0>] unregister_rpmsg_driver+0x10/0x1c\n[<0>] fastrpc_exit+0x28/0x38 [fastrpc]\n[<0>] __arm64_sys_delete_module+0x1b8/0x294\n[<0>] invoke_syscall+0x48/0x10c\n[<0>] el0_svc_common.constprop.0+0xc0/0xe0\n[<0>] do_el0_svc+0x1c/0x28\n[<0>] el0_svc+0x34/0x108\n[<0>] el0t_64_sync_handler+0xa0/0xe4\n[<0>] el0t_64_sync+0x198/0x19c\n\nThe rpmsg device unregistration inside endpoint destroy is redundant.\nIn both contexts where endpoint destruction is triggered:\n\n- Driver detach path: the driver core already tears down the rpmsg\n  device.\n\n- Channel close path: the rpmsg device is already unregistered before\n  endpoint destruction is reached.\n\nRemove the redundant unregistration to fix the deadlock.","state":0,"publishedAt":"2026-09-17T16:11:11.703+00:00","modifiedAt":"2026-10-19T09:05:31.403+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                        \"drivers/rpmsg/qcom_glink_native.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"93b6b9e4acff4794e7426d3ad64ef14e3b3e8919\",\n                            \"lessThan\": \"73092c2292aa65515671e54abbcda2166d3827ed\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"24fd02c3a4798de7dc94b55d36a1685fe6cdaf69\",\n                            \"lessThan\": \"bbc236357876d35a624030e5c50eedbc380be98e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"32fe8cdf541863239b81c80b8b04112d6e8792cf\",\n                            \"lessThan\": \"8597f669a5268e0dcf243e2b2d6ca00370117057\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c6210714347f72bae8e7142dc0a7f99923c466e7\",\n                            \"lessThan\": \"48f55b90f0d713e477e26b85d7327d9592d016f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fcab5c2672f8dac3d77013dbe047b2441f4141f5\",\n                            \"lessThan\": \"cbcdf96e1c87bc07055d04264018ded1f3bafffb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f80e4e91b010ee7d6c52f24d069975ac955ac6b2\",\n                            \"lessThan\": \"ecad679e2b92c419cc22cc8f257cd457d5192647\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53e356df548f6b0e82529ef3cc6070f42622189\",\n                            \"lessThan\": \"e559626bee8a6632aafc08eedcdb4bf26ca245c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53e356df548f6b0e82529ef3cc6070f42622189\",\n                            \"lessThan\": \"5a5a48e788e02fd8a8eb7188ce440572d6c12418\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.248\",\n                            \"lessThan\": \"5.10.270\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.198\",\n                            \"lessThan\": \"5.15.221\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.160\",\n                            \"lessThan\": \"6.1.188\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.120\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.64\",\n                            \"lessThan\": \"6.12.110\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.3\",\n                            \"lessThan\": \"6.18.52\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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                        \"drivers/rpmsg/qcom_glink_native.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/73092c2292aa65515671e54abbcda2166d3827ed","https://git.kernel.org/stable/c/bbc236357876d35a624030e5c50eedbc380be98e","https://git.kernel.org/stable/c/8597f669a5268e0dcf243e2b2d6ca00370117057","https://git.kernel.org/stable/c/48f55b90f0d713e477e26b85d7327d9592d016f9","https://git.kernel.org/stable/c/cbcdf96e1c87bc07055d04264018ded1f3bafffb","https://git.kernel.org/stable/c/ecad679e2b92c419cc22cc8f257cd457d5192647","https://git.kernel.org/stable/c/e559626bee8a6632aafc08eedcdb4bf26ca245c5","https://git.kernel.org/stable/c/5a5a48e788e02fd8a8eb7188ce440572d6c12418"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93098","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93098","identifiers":["CVE-2026-93098"]},"retained":false,"historicalAffected":[]}],"coverage":[]}