{"id":"CVE-2026-90218","state":"PUBLISHED","title":"RDMA/cma: Fix WARNING in res_to_rt","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix WARNING in res_to_rt\n\nsyzbot reported a WARN_ON(!res->dev) in res_to_rt() triggered via\naddr_handler() during asynchronous address resolution:\n\n\"\nWARNING: drivers/infiniband/core/restrack.c:138 at res_to_rt+0x1c4/0x230\nCPU#1: kworker/u8:4/59\nModules linked in:\nCPU: 1 UID: 0 PID: 59 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Compute Engine, BIOS Google 07/24/2026\nWorkqueue: ib_addr process_one_req\nRIP: 0010:res_to_rt+0x1c4/0x230 drivers/infiniband/core/restrack.c:138\nRSP: 0018:ffffc9000201f850 EFLAGS: 00010293\nRAX: ffffffff88d00ce5 RBX: ffff88807f0fd4f8 RCX: ffff88801e6e0000\nRDX: 0000000000000000 RSI: ffffffff8fd996f0 RDI: 0000000000000003\nRBP: 0000000000000000 R08: ffff88801e6e0000 R09: 000000000000000a\nR10: 0000000000000009 R11: 0000000000000000 R12: dffffc0000000000\nR13: 1ffff1100fe1fa9f R14: 0000000000000000 R15: 0000000000000003\nFS:  0000000000000000(0000) GS:ffff888125012000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00001d559c3d2000 CR3: 0000000077c4c000 CR4: 00000000003526f0\nCall Trace:\n <TASK>\n rdma_restrack_add+0x5a/0x8a0 drivers/infiniband/core/restrack.c:236\n addr_handler+0x41a/0x5a0 drivers/infiniband/core/cma.c:3534\n process_one_req+0x2eb/0x540 drivers/infiniband/core/addr.c:624\n process_one_work kernel/workqueue.c:3375 [inline]\n process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\"\n\nIn addr_handler(), cma_acquire_dev_by_src_ip() is called to populate\nid_priv->cma_dev and bind the associated ib_device to id_priv->id.device.\nIf cma_acquire_dev_by_src_ip() returns an error (non-zero status), the ID\nremains unassociated with any RDMA device.\n\nPreviously, rdma_restrack_add(&id_priv->res) was invoked unconditionally\neven when cma_acquire_dev_by_src_ip() failed, passing a resource with a\nNULL dev pointer and triggering the WARN_ON assertion in res_to_rt().\n\nFix this by only adding the resource to restrack when acquiring the device\nsucceeds.","publishedAt":"2026-09-17T16:07:30.076Z","updatedAt":"2026-10-19T08:59:54.084Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c5ebaca402f5c5bd61ac8316feb2aa3a0be4d4a8","status":"affected","lessThan":"1d7e55ea64dd15769318ba2e0fe0956db82ba3c3","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"39e83bb77fc92344cd62a373b311f096d812e548","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"9c80273d663959504957606b9a24fe901ee2a4a1","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"2a63cb9ea862ac7d947952b497eef6520853538c","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"f72957e0b31f2962f4c1089a9223f1206aa26983","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"544e40805dbb6cfe64916bd4c8b238fec585ac2a","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"c6d1ec4fbe56492bb88987d577f04a5fb6955f26","versionType":"git"},{"version":"073fdf539d4c022162db3d77a5afca1710f0de2d","status":"affected","versionType":"git"},{"version":"fa37a461bd6d9ee86e891ba3e4074a450e44c881","status":"affected","versionType":"git"},{"version":"5.10.37","status":"affected","lessThan":"5.10.270","versionType":"semver"},{"version":"5.11.21","status":"affected","lessThan":"5.12","versionType":"semver"},{"version":"5.12.4","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]}],"references":["https://git.kernel.org/stable/c/1d7e55ea64dd15769318ba2e0fe0956db82ba3c3","https://git.kernel.org/stable/c/39e83bb77fc92344cd62a373b311f096d812e548","https://git.kernel.org/stable/c/9c80273d663959504957606b9a24fe901ee2a4a1","https://git.kernel.org/stable/c/2a63cb9ea862ac7d947952b497eef6520853538c","https://git.kernel.org/stable/c/f72957e0b31f2962f4c1089a9223f1206aa26983","https://git.kernel.org/stable/c/544e40805dbb6cfe64916bd4c8b238fec585ac2a","https://git.kernel.org/stable/c/64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b","https://git.kernel.org/stable/c/c6d1ec4fbe56492bb88987d577f04a5fb6955f26"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90218.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90218","state":"PUBLISHED","datePublished":"2026-09-17T16:07:30.076Z","dateUpdated":"2026-10-19T08:59:54.084Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.793Z"},"containers":{"cna":{"title":"RDMA/cma: Fix WARNING in res_to_rt","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix WARNING in res_to_rt\n\nsyzbot reported a WARN_ON(!res->dev) in res_to_rt() triggered via\naddr_handler() during asynchronous address resolution:\n\n\"\nWARNING: drivers/infiniband/core/restrack.c:138 at res_to_rt+0x1c4/0x230\nCPU#1: kworker/u8:4/59\nModules linked in:\nCPU: 1 UID: 0 PID: 59 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Compute Engine, BIOS Google 07/24/2026\nWorkqueue: ib_addr process_one_req\nRIP: 0010:res_to_rt+0x1c4/0x230 drivers/infiniband/core/restrack.c:138\nRSP: 0018:ffffc9000201f850 EFLAGS: 00010293\nRAX: ffffffff88d00ce5 RBX: ffff88807f0fd4f8 RCX: ffff88801e6e0000\nRDX: 0000000000000000 RSI: ffffffff8fd996f0 RDI: 0000000000000003\nRBP: 0000000000000000 R08: ffff88801e6e0000 R09: 000000000000000a\nR10: 0000000000000009 R11: 0000000000000000 R12: dffffc0000000000\nR13: 1ffff1100fe1fa9f R14: 0000000000000000 R15: 0000000000000003\nFS:  0000000000000000(0000) GS:ffff888125012000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00001d559c3d2000 CR3: 0000000077c4c000 CR4: 00000000003526f0\nCall Trace:\n <TASK>\n rdma_restrack_add+0x5a/0x8a0 drivers/infiniband/core/restrack.c:236\n addr_handler+0x41a/0x5a0 drivers/infiniband/core/cma.c:3534\n process_one_req+0x2eb/0x540 drivers/infiniband/core/addr.c:624\n process_one_work kernel/workqueue.c:3375 [inline]\n process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\"\n\nIn addr_handler(), cma_acquire_dev_by_src_ip() is called to populate\nid_priv->cma_dev and bind the associated ib_device to id_priv->id.device.\nIf cma_acquire_dev_by_src_ip() returns an error (non-zero status), the ID\nremains unassociated with any RDMA device.\n\nPreviously, rdma_restrack_add(&id_priv->res) was invoked unconditionally\neven when cma_acquire_dev_by_src_ip() failed, passing a resource with a\nNULL dev pointer and triggering the WARN_ON assertion in res_to_rt().\n\nFix this by only adding the resource to restrack when acquiring the device\nsucceeds."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c5ebaca402f5c5bd61ac8316feb2aa3a0be4d4a8","status":"affected","lessThan":"1d7e55ea64dd15769318ba2e0fe0956db82ba3c3","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"39e83bb77fc92344cd62a373b311f096d812e548","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"9c80273d663959504957606b9a24fe901ee2a4a1","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"2a63cb9ea862ac7d947952b497eef6520853538c","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"f72957e0b31f2962f4c1089a9223f1206aa26983","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"544e40805dbb6cfe64916bd4c8b238fec585ac2a","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b","versionType":"git"},{"version":"cb5cd0ea4eb3ce338a593a5331ddb4986ae20faa","status":"affected","lessThan":"c6d1ec4fbe56492bb88987d577f04a5fb6955f26","versionType":"git"},{"version":"073fdf539d4c022162db3d77a5afca1710f0de2d","status":"affected","versionType":"git"},{"version":"fa37a461bd6d9ee86e891ba3e4074a450e44c881","status":"affected","versionType":"git"},{"version":"5.10.37","status":"affected","lessThan":"5.10.270","versionType":"semver"},{"version":"5.11.21","status":"affected","lessThan":"5.12","versionType":"semver"},{"version":"5.12.4","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/infiniband/core/cma.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1d7e55ea64dd15769318ba2e0fe0956db82ba3c3"},{"url":"https://git.kernel.org/stable/c/39e83bb77fc92344cd62a373b311f096d812e548"},{"url":"https://git.kernel.org/stable/c/9c80273d663959504957606b9a24fe901ee2a4a1"},{"url":"https://git.kernel.org/stable/c/2a63cb9ea862ac7d947952b497eef6520853538c"},{"url":"https://git.kernel.org/stable/c/f72957e0b31f2962f4c1089a9223f1206aa26983"},{"url":"https://git.kernel.org/stable/c/544e40805dbb6cfe64916bd4c8b238fec585ac2a"},{"url":"https://git.kernel.org/stable/c/64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b"},{"url":"https://git.kernel.org/stable/c/c6d1ec4fbe56492bb88987d577f04a5fb6955f26"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:59:54.084Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.37","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:lin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