{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98619","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.360Z","datePublished":"2026-10-18T15:19:39.448Z","dateUpdated":"2026-10-19T09:22:47.182Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:22:47.182Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethtool: keep rtnl_lock for the ioctl self test\n\nAn offline self test that brings the interface down and back up with\nnetif_close() / netif_open() requires rtnl_lock for both. Since the\nethtool IOCTL path became rtnl-optional for ops-locked drivers, the\nETHTOOL_TEST ioctl runs holding only the netdev instance lock, so on an\nops-locked driver the self test now tears the device down without\nrtnl_lock.\n\nWith lockdep this reproduces deterministically on every offline self\ntest on such a driver; note the sole lock held is the instance lock, not\nrtnl:\n\n  WARNING: suspicious RCU usage\n  net/core/netpoll.c:207 suspicious rcu_dereference_protected() usage!\n  1 lock held by ethtool/107:\n   #0: (&dev->lock){+.+.}, at: dev_ethtool\n  Call Trace:\n   netpoll_poll_disable\n   __dev_close_many\n   netif_close_many\n   netif_close\n   fbnic_self_test\n   dev_ethtool_locked\n   dev_ethtool\n   dev_ioctl\n   sock_ioctl\n   __x64_sys_ioctl\n\nWithout lockdep the same condition trips ASSERT_RTNL() in\n__dev_close_many() / __dev_open(); that check only samples the global\nrtnl state, so it can be masked by a concurrent rtnl holder, but the\ndevice is still being reconfigured without the lock it requires.\n\nThe ethtool self_test is a legacy ioctl-only command, so an ETHTOOL_TEST\ncase is only needed on the ioctl path. Add an opt-in bit for drivers whose\nself test needs rtnl_lock and set it on the ops-locked drivers whose\noffline self test tears the interface down and up:\n\n  - fbnic (ops-locked via queue_mgmt_ops): fbnic_self_test() offline path\n    uses netif_close() / netif_open().\n  - bnxt (ops-locked via queue_mgmt_ops): bnxt_self_test() offline path\n    goes through bnxt_close_nic() / bnxt_half_open_nic() /\n    bnxt_half_close_nic() / bnxt_open_nic(), which close and reopen the\n    device."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c","drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c","include/linux/ethtool.h","net/ethtool/common.h"],"versions":[{"version":"f994752b11273ded7ec6b49ae5c1d319eef21743","lessThan":"4ca1503491f1f25a954c13ac5775bf6775c5abc8","status":"affected","versionType":"git"},{"version":"f994752b11273ded7ec6b49ae5c1d319eef21743","lessThan":"1b82958f3f035df5ccaab5430a2302f08a5d5351","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/net/ethernet/broadcom/bnxt/bnxt_ethtool.c","drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c","include/linux/ethtool.h","net/ethtool/common.h"],"versions":[{"version":"7.2","status":"affected"},{"version":"0","lessThan":"7.2","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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":"7.2","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4ca1503491f1f25a954c13ac5775bf6775c5abc8"},{"url":"https://git.kernel.org/stable/c/1b82958f3f035df5ccaab5430a2302f08a5d5351"}],"title":"net: ethtool: keep rtnl_lock for the ioctl self test","x_generator":{"engine":"bippy-1.2.0"}}}}