{"id":"CVE-2023-54274","summary":"RDMA/srpt: Add a check for valid 'mad_agent' pointer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srpt: Add a check for valid 'mad_agent' pointer\n\nWhen unregistering MAD agent, srpt module has a non-null check\nfor 'mad_agent' pointer before invoking ib_unregister_mad_agent().\nThis check can pass if 'mad_agent' variable holds an error value.\nThe 'mad_agent' can have an error value for a short window when\nsrpt_add_one() and srpt_remove_one() is executed simultaneously.\n\nIn srpt module, added a valid pointer check for 'sport-\u003emad_agent'\nbefore unregistering MAD agent.\n\nThis issue can hit when RoCE driver unregisters ib_device\n\nStack Trace:\n------------\nBUG: kernel NULL pointer dereference, address: 000000000000004d\nPGD 145003067 P4D 145003067 PUD 2324fe067 PMD 0\nOops: 0002 [#1] PREEMPT SMP NOPTI\nCPU: 10 PID: 4459 Comm: kworker/u80:0 Kdump: loaded Tainted: P\nHardware name: Dell Inc. PowerEdge R640/06NR82, BIOS 2.5.4 01/13/2020\nWorkqueue: bnxt_re bnxt_re_task [bnxt_re]\nRIP: 0010:_raw_spin_lock_irqsave+0x19/0x40\nCall Trace:\n  ib_unregister_mad_agent+0x46/0x2f0 [ib_core]\n  IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready\n  ? __schedule+0x20b/0x560\n  srpt_unregister_mad_agent+0x93/0xd0 [ib_srpt]\n  srpt_remove_one+0x20/0x150 [ib_srpt]\n  remove_client_context+0x88/0xd0 [ib_core]\n  bond0: (slave p2p1): link status definitely up, 100000 Mbps full duplex\n  disable_device+0x8a/0x160 [ib_core]\n  bond0: active interface up!\n  ? kernfs_name_hash+0x12/0x80\n (NULL device *): Bonding Info Received: rdev: 000000006c0b8247\n  __ib_unregister_device+0x42/0xb0 [ib_core]\n (NULL device *):         Master: mode: 4 num_slaves:2\n  ib_unregister_device+0x22/0x30 [ib_core]\n (NULL device *):         Slave: id: 105069936 name:p2p1 link:0 state:0\n  bnxt_re_stopqps_and_ib_uninit+0x83/0x90 [bnxt_re]\n  bnxt_re_alloc_lag+0x12e/0x4e0 [bnxt_re]","modified":"2026-04-02T09:45:44.059719Z","published":"2025-12-30T12:16:03.696Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0617-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54274.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00cc21e32ea1b8ebbabf5d645da9378d986bf8ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4323aaedeba32076e652aad056afd7885bb96bb7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5f6ef2a574b0e0e0ea46ed0022575442df9d0bf9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ec6acdb9b6a80eeb13e778dfedb5d72a88f14fe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b713623bfef8cb1df9c769a3887fa10db63d1c54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eca5cd9474cd26d62f9756f536e2e656d3f62f3a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54274.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54274"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a42d985bd5b234da8b61347a78dc3057bf7bb94d"},{"fixed":"8ec6acdb9b6a80eeb13e778dfedb5d72a88f14fe"},{"fixed":"00cc21e32ea1b8ebbabf5d645da9378d986bf8ba"},{"fixed":"4323aaedeba32076e652aad056afd7885bb96bb7"},{"fixed":"5f6ef2a574b0e0e0ea46ed0022575442df9d0bf9"},{"fixed":"b713623bfef8cb1df9c769a3887fa10db63d1c54"},{"fixed":"eca5cd9474cd26d62f9756f536e2e656d3f62f3a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54274.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.3.0"},{"fixed":"5.10.180"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.28"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.15"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.3.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54274.json"}}],"schema_version":"1.7.5"}