CVE-2026-98694

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98694", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.364Z", "datePublished": "2026-10-18T15:46:18.654Z", "dateUpdated": "2026-10-30T12:38:46.335Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:38:46.335Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Fix KASAN reported use-after-free when request is canceled\n\nAlan reported that when doing stress testing sometimes KASAN notices\nuse-after-free during control channel operation (stripped down keeping\nthe relevant parts):\n\n BUG: KASAN: slab-use-after-free in tb_cfg_request_sync+0x240/0x250 [thunderbolt]\n Read of size 24 at addr ffff88811067f290 by task kworker/u40:2/1760\n <TASK>\n tb_cfg_request_sync+0x240/0x250 [thunderbolt]\n tb_cfg_read_raw+0x367/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\n Allocated by task 1760:\n __kmalloc_cache_noprof+0x1ee/0x550\n tb_cfg_read_raw+0x1d3/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\n Freed by task 926:\n kfree+0x18f/0x4a0\n tb_cfg_request_put+0xb7/0xe0 [thunderbolt]\n tb_cfg_request_work+0x82/0x120 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\n Second to last potentially related work creation:\n __queue_work+0x575/0xd00\n queue_work_on+0x77/0x80\n tb_cfg_request_cancel+0xc7/0x260 [thunderbolt]\n tb_cfg_request_sync+0x1f6/0x250 [thunderbolt]\n tb_cfg_read_raw+0x367/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\nThe last stack trace is helpful because it shows that we are cancelling\na request and looking at tb_cfg_request_cancel() what might happen is\nthat tb_cfg_request_work() completes right before tb_cfg_request_cancel()\nstarts and because of this it will call schedule_work() queueing the\nsame work to run again. However, it is already removed from the\nrequest_queue and reference count is dropped so when\ntb_cfg_request_work() triggers again it will access memory that is\nalready released.\n\nFix this so that we first make sure a cancelled request is not handed\naway from tb_cfg_request_find() or scheduled to run. Then instead of\nrelying on the worker to clean up the request we will do it in\ntb_cfg_request_cancel() after the work is canceled from running. Make\ntb_cfg_request_dequeue() release the request only if it was actually\nremoved from the queue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/ctl.c"], "versions": [{"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "94358146389d985b809898cc23b1030ff240a25d", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "9594550e95bcc362027b7ad5f0d5665110f8a7d8", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "0dc4296ac0910d3a43d9e105226ace463e475304", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "b70b9c41f240c42bf6e728034537c0fe60c16ef4", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "71b3c517e02af2c46ad58d4b3706b7c3cb24936d", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "f18faa3d3b810d60a3005ae1b1d1866faa67d343", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "08287212b622039212c972806f896f078dfd28e2", "status": "affected", "versionType": "git"}, {"version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "lessThan": "a02188ddc24b7872f0c5e0c5873f827318717803", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/ctl.c"], "versions": [{"version": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/94358146389d985b809898cc23b1030ff240a25d"}, {"url": "https://git.kernel.org/stable/c/9594550e95bcc362027b7ad5f0d5665110f8a7d8"}, {"url": "https://git.kernel.org/stable/c/0dc4296ac0910d3a43d9e105226ace463e475304"}, {"url": "https://git.kernel.org/stable/c/b70b9c41f240c42bf6e728034537c0fe60c16ef4"}, {"url": "https://git.kernel.org/stable/c/71b3c517e02af2c46ad58d4b3706b7c3cb24936d"}, {"url": "https://git.kernel.org/stable/c/f18faa3d3b810d60a3005ae1b1d1866faa67d343"}, {"url": "https://git.kernel.org/stable/c/08287212b622039212c972806f896f078dfd28e2"}, {"url": "https://git.kernel.org/stable/c/a02188ddc24b7872f0c5e0c5873f827318717803"}], "title": "thunderbolt: Fix KASAN reported use-after-free when request is canceled", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/thunderbolt/ctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "94358146389d985b809898cc23b1030ff240a25d", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "9594550e95bcc362027b7ad5f0d5665110f8a7d8", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "0dc4296ac0910d3a43d9e105226ace463e475304", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "b70b9c41f240c42bf6e728034537c0fe60c16ef4", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "71b3c517e02af2c46ad58d4b3706b7c3cb24936d", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "f18faa3d3b810d60a3005ae1b1d1866faa67d343", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "08287212b622039212c972806f896f078dfd28e2", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}, {"lessThan": "a02188ddc24b7872f0c5e0c5873f827318717803", "status": "affected", "version": "d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/thunderbolt/ctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.13"}, {"lessThan": "4.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Fix KASAN reported use-after-free when request is canceled\n\nAlan reported that when doing stress testing sometimes KASAN notices\nuse-after-free during control channel operation (stripped down keeping\nthe relevant parts):\n\n BUG: KASAN: slab-use-after-free in tb_cfg_request_sync+0x240/0x250 [thunderbolt]\n Read of size 24 at addr ffff88811067f290 by task kworker/u40:2/1760\n <TASK>\n tb_cfg_request_sync+0x240/0x250 [thunderbolt]\n tb_cfg_read_raw+0x367/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\n Allocated by task 1760:\n __kmalloc_cache_noprof+0x1ee/0x550\n tb_cfg_read_raw+0x1d3/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\n Freed by task 926:\n kfree+0x18f/0x4a0\n tb_cfg_request_put+0xb7/0xe0 [thunderbolt]\n tb_cfg_request_work+0x82/0x120 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\n Second to last potentially related work creation:\n __queue_work+0x575/0xd00\n queue_work_on+0x77/0x80\n tb_cfg_request_cancel+0xc7/0x260 [thunderbolt]\n tb_cfg_request_sync+0x1f6/0x250 [thunderbolt]\n tb_cfg_read_raw+0x367/0x510 [thunderbolt]\n tb_cfg_read+0xec/0x240 [thunderbolt]\n tb_port_get_link_generation+0x258/0x420 [thunderbolt]\n tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\n tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\n tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\n tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\n tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\n process_one_work+0x675/0x1230\n worker_thread+0x5e6/0xf70\n kthread+0x365/0x470\n ret_from_fork+0x54d/0x710\n ret_from_fork_asm+0x1a/0x30\n\nThe last stack trace is helpful because it shows that we are cancelling\na request and looking at tb_cfg_request_cancel() what might happen is\nthat tb_cfg_request_work() completes right before tb_cfg_request_cancel()\nstarts and because of this it will call schedule_work() queueing the\nsame work to run again. However, it is already removed from the\nrequest_queue and reference count is dropped so when\ntb_cfg_request_work() triggers again it will access memory that is\nalready released.\n\nFix this so that we first make sure a cancelled request is not handed\naway from tb_cfg_request_find() or scheduled to run. Then instead of\nrelying on the worker to clean up the request we will do it in\ntb_cfg_request_cancel() after the work is canceled from running. Make\ntb_cfg_request_dequeue() release the request only if it was actually\nremoved from the queue."}], "id": "CVE-2026-98694", "lastModified": "2026-10-30T13:21:18.383", "metrics": {}, "published": "2026-10-18T16:17:22.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08287212b622039212c972806f896f078dfd28e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dc4296ac0910d3a43d9e105226ace463e475304"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/71b3c517e02af2c46ad58d4b3706b7c3cb24936d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/94358146389d985b809898cc23b1030ff240a25d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9594550e95bcc362027b7ad5f0d5665110f8a7d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a02188ddc24b7872f0c5e0c5873f827318717803"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b70b9c41f240c42bf6e728034537c0fe60c16ef4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f18faa3d3b810d60a3005ae1b1d1866faa67d343"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: thunderbolt: Fix KASAN reported use-after-free when request is canceled", "id": "2555134", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555134"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthunderbolt: Fix KASAN reported use-after-free when request is canceled\nAlan reported that when doing stress testing sometimes KASAN notices\nuse-after-free during control channel operation (stripped down keeping\nthe relevant parts):\nBUG: KASAN: slab-use-after-free in tb_cfg_request_sync+0x240/0x250 [thunderbolt]\nRead of size 24 at addr ffff88811067f290 by task kworker/u40:2/1760\n<TASK>\ntb_cfg_request_sync+0x240/0x250 [thunderbolt]\ntb_cfg_read_raw+0x367/0x510 [thunderbolt]\ntb_cfg_read+0xec/0x240 [thunderbolt]\ntb_port_get_link_generation+0x258/0x420 [thunderbolt]\ntb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\ntb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\ntb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\ntb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\ntb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\nprocess_one_work+0x675/0x1230\nworker_thread+0x5e6/0xf70\nkthread+0x365/0x470\nret_from_fork+0x54d/0x710\nret_from_fork_asm+0x1a/0x30\n</TASK>\nAllocated by task 1760:\n__kmalloc_cache_noprof+0x1ee/0x550\ntb_cfg_read_raw+0x1d3/0x510 [thunderbolt]\ntb_cfg_read+0xec/0x240 [thunderbolt]\ntb_port_get_link_generation+0x258/0x420 [thunderbolt]\ntb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\ntb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\ntb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\ntb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\ntb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\nprocess_one_work+0x675/0x1230\nworker_thread+0x5e6/0xf70\nkthread+0x365/0x470\nret_from_fork+0x54d/0x710\nret_from_fork_asm+0x1a/0x30\nFreed by task 926:\nkfree+0x18f/0x4a0\ntb_cfg_request_put+0xb7/0xe0 [thunderbolt]\ntb_cfg_request_work+0x82/0x120 [thunderbolt]\nprocess_one_work+0x675/0x1230\nworker_thread+0x5e6/0xf70\nkthread+0x365/0x470\nret_from_fork+0x54d/0x710\nret_from_fork_asm+0x1a/0x30\nSecond to last potentially related work creation:\n__queue_work+0x575/0xd00\nqueue_work_on+0x77/0x80\ntb_cfg_request_cancel+0xc7/0x260 [thunderbolt]\ntb_cfg_request_sync+0x1f6/0x250 [thunderbolt]\ntb_cfg_read_raw+0x367/0x510 [thunderbolt]\ntb_cfg_read+0xec/0x240 [thunderbolt]\ntb_port_get_link_generation+0x258/0x420 [thunderbolt]\ntb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt]\ntb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt]\ntb_available_bandwidth+0x5f2/0xeb0 [thunderbolt]\ntb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt]\ntb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt]\nprocess_one_work+0x675/0x1230\nworker_thread+0x5e6/0xf70\nkthread+0x365/0x470\nret_from_fork+0x54d/0x710\nret_from_fork_asm+0x1a/0x30\nThe last stack trace is helpful because it shows that we are cancelling\na request and looking at tb_cfg_request_cancel() what might happen is\nthat tb_cfg_request_work() completes right before tb_cfg_request_cancel()\nstarts and because of this it will call schedule_work() queueing the\nsame work to run again. However, it is already removed from the\nrequest_queue and reference count is dropped so when\ntb_cfg_request_work() triggers again it will access memory that is\nalready released.\nFix this so that we first make sure a cancelled request is not handed\naway from tb_cfg_request_find() or scheduled to run. Then instead of\nrelying on the worker to clean up the request we will do it in\ntb_cfg_request_cancel() after the work is canceled from running. Make\ntb_cfg_request_dequeue() release the request only if it was actually\nremoved from the queue.", "A flaw was found in the Linux kernel's Thunderbolt driver. When a control channel request is canceled, a race condition can cause the request to be rescheduled after its memory has already been freed, resulting in a use-after-free vulnerability. A local attacker could exploit this flaw to cause a Denial of Service (DoS) via a system crash or potentially corrupt kernel memory."], "name": "CVE-2026-98694", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98694\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98694\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98694.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1,71b3c517e02af2c46ad58d4b3706b7c3cb24936d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1,f18faa3d3b810d60a3005ae1b1d1866faa67d343)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1,08287212b622039212c972806f896f078dfd28e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d7f781bfdbf4eb7c5706c9974b8bf6d3c82e69c1,a02188ddc24b7872f0c5e0c5873f827318717803)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.113,6.13.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.56,6.19.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.10,7.3.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T22:15:14.440368+00:00", "updated": "2026-10-22T21:00:08.758432+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}