{"id":"CVE-2026-99194","kind":"vulnerability","aliases":["CVE-2026-99194"],"related":[],"title":"Linux kernel: Aeroflex Ethernet driver crashes on probe with shaper enabled","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: aeroflex: move setting of netops to fix crash\n\ngreth_of_probe() calls greth_mdio_init(), which connects the PHY,\nbefore dev->netdev_ops is assigned. phy_attach_direct() ->\nphy_link_topo_add_phy() reads dev->netdev_ops through\nnetdev_need_ops_lock() since the commit in question, so probing crashes\nwith a NULL pointer dereference when CONFIG_NET_SHAPER is enabled.\n\nAssign netdev_ops before the PHY attach, as was done for emac in commit\n7c9f391ec89c (\"net: emac: move setting of netops to fix crash\").","summary":"In the Linux kernel's Aeroflex (GRETH) Ethernet driver, the netdev operations were assigned after the PHY was attached, so probing the device dereferences a NULL pointer when CONFIG_NET_SHAPER is enabled. The fix moves the netdev_ops assignment ahead of the PHY attach, which the sources describe as the same change made earlier for the emac driver.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["embedded","ethernet","infrastructure","kernel","linux"],"not_affected_if":["config-net-shaper-disabled","no-aeroflex-hardware"],"how_to_check":"- unknown","fix":"- Update the Linux kernel to a release that includes the upstream commit moving netdev_ops assignment in the aeroflex driver (version unknown from sources)\n- Check whether `CONFIG_NET_SHAPER` is enabled in the running kernel config","status":"open","published_at":"2026-10-28T11:17:40+00:00","first_seen_at":"2026-10-28T11:32:37+00:00","triaged_at":"2026-10-28T11:34:09+00:00","updated_at":"2026-10-28T11:34:09+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-28T11:34:09Z","model":"claude-haiku-5-5","output":{"fix":"- Update the Linux kernel to a release that includes the upstream commit moving netdev_ops assignment in the aeroflex driver (version unknown from sources)\n- Check whether `CONFIG_NET_SHAPER` is enabled in the running kernel config","reach":"local","title":"Linux kernel: Aeroflex Ethernet driver crashes on probe with shaper enabled","impact":"low","summary":"In the Linux kernel's Aeroflex (GRETH) Ethernet driver, the netdev operations were assigned after the PHY was attached, so probing the device dereferences a NULL pointer when CONFIG_NET_SHAPER is enabled. The fix moves the netdev_ops assignment ahead of the PHY attach, which the sources describe as the same change made earlier for the emac driver.","category":"infrastructure","nicknames":[],"who_cares":["linux","kernel","embedded","ethernet"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Kernel crash during device probe causing denial of service","analyst_note":"","how_to_check":"- unknown","needs_analyst":false,"not_affected_if":["no-aeroflex-hardware","config-net-shaper-disabled"],"who_is_affected":"Systems running a Linux kernel with the Aeroflex GRETH Ethernet driver and CONFIG_NET_SHAPER enabled, where the device is probed at boot. The sources describe a crash (denial of service) during probe, not code execution. Systems without this hardware or without CONFIG_NET_SHAPER are unlikely to be affected.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000639,"input_tokens":3457,"output_tokens":587,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-99194':14A,17A '7c9f391ec89c':169C 'add':125C 'aeroflex':3A,28B,94C 'ahead':63B 'assign':36B,62B,118C,155C 'attach':41B,67B,120C,161C 'call':105C 'chang':75B 'commit':138C,168C 'config':51B,150C 'connect':110C 'crash':6A,101C,143C,178C 'cve':12A,15A 'derefer':46B,148C 'describ':71B 'dev':114C,128C 'devic':45B 'direct':121C 'done':164C 'driver':5A,31B,81B 'earlier':77B 'emac':80B,166C,171C 'embed':18B 'enabl':11A,55B,154C 'ethernet':4A,19B,30B,93C 'fix':57B,100C,177C 'follow':87C 'greth':29B,102C,106C 'infrastructur':20B 'init':108C 'kernel':2A,21B,26B,85C 'link':123C 'linux':1A,22B,25B,84C 'lock':135C 'made':76B 'mdio':107C 'move':58B,95C,172C 'need':133C 'net':52B,92C,151C,170C 'netdev':33B,60B,115C,129C,132C,156C 'netop':98C,175C 'null':48B,146C 'op':61B,116C,130C,134C,157C 'oper':34B 'phi':39B,66B,112C,119C,122C,126C,160C 'pointer':49B,147C 'probe':8A,43B,104C,142C 'question':140C 'read':127C 'resolv':91C 'set':96C,173C 'shaper':10A,53B,152C 'sinc':136C 'sourc':70B 'topo':124C 'vulner':88C","nicknames":[],"mitigations":[],"who_affected":"Systems running a Linux kernel with the Aeroflex GRETH Ethernet driver and CONFIG_NET_SHAPER enabled, where the device is probed at boot. The sources describe a crash (denial of service) during probe, not code execution. Systems without this hardware or without CONFIG_NET_SHAPER are unlikely to be affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T11:17:40+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-99194","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99194","severity":null,"published_at":"2026-10-28T11:17:40+00:00","modified_at":"2026-10-28T11:17:40+00:00","first_seen_at":"2026-10-28T11:32:37+00:00","fetched_at":"2026-10-28T11:32:37+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}