{"cve":"CVE-2025-22089","nvd":{"published":"2025-04-16T15:16:03.110","modified":"2026-07-30T06:22:12.373","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Don't expose hw_counters outside of init net namespace\n\nCommit 467f432a521a (\"RDMA/core: Split port and device counter sysfs\nattributes\") accidentally almost exposed hw counters to non-init net\nnamespaces. It didn't expose them fully, as an attempt to read any of\nthose counters leads to a crash like this one:\n\n[42021.807566] BUG: kernel NULL pointer dereference, address: 0000000000000028\n[42021.814463] #PF: supervisor read access in kernel mode\n[42021.819549] #PF: error_code(0x0000) - not-present page\n[42021.824636] PGD 0 P4D 0\n[42021.827145] Oops: 0000 [#1] SMP PTI\n[42021.830598] CPU: 82 PID: 2843922 Comm: switchto-defaul Kdump: loaded Tainted: G S      W I        XXX\n[42021.841697] Hardware name: XXX\n[42021.849619] RIP: 0010:hw_stat_device_show+0x1e/0x40 [ib_core]\n[42021.855362] Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 49 89 d0 4c 8b 5e 20 48 8b 8f b8 04 00 00 48 81 c7 f0 fa ff ff <48> 8b 41 28 48 29 ce 48 83 c6 d0 48 c1 ee 04 69 d6 ab aa aa aa 48\n[42021.873931] RSP: 0018:ffff97fe90f03da0 EFLAGS: 00010287\n[42021.879108] RAX: ffff9406988a8c60 RBX: ffff940e1072d438 RCX: 0000000000000000\n[42021.886169] RDX: ffff94085f1aa000 RSI: ffff93c6cbbdbcb0 RDI: ffff940c7517aef0\n[42021.893230] RBP: ffff97fe90f03e70 R08: ffff94085f1aa000 R09: 0000000000000000\n[42021.900294] R10: ffff94085f1aa000 R11: ffffffffc0775680 R12: ffffffff87ca2530\n[42021.907355] R13: ffff940651602840 R14: ffff93c6cbbdbcb0 R15: ffff94085f1aa000\n[42021.914418] FS:  00007fda1a3b9700(0000) GS:ffff94453fb80000(0000) knlGS:0000000000000000\n[42021.922423] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[42021.928130] CR2: 0000000000000028 CR3: 00000042dcfb8003 CR4: 00000000003726f0\n[42021.935194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[42021.942257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[42021.949324] Call Trace:\n[42021.951756]  <TASK>\n[42021.953842]  [<ffffffff86c58674>] ? show_regs+0x64/0x70\n[42021.959030]  [<ffffffff86c58468>] ? __die+0x78/0xc0\n[42021.963874]  [<ffffffff86c9ef75>] ? page_fault_oops+0x2b5/0x3b0\n[42021.969749]  [<ffffffff87674b92>] ? exc_page_fault+0x1a2/0x3c0\n[42021.975549]  [<ffffffff87801326>] ? asm_exc_page_fault+0x26/0x30\n[42021.981517]  [<ffffffffc0775680>] ? __pfx_show_hw_stats+0x10/0x10 [ib_core]\n[42021.988482]  [<ffffffffc077564e>] ? hw_stat_device_show+0x1e/0x40 [ib_core]\n[42021.995438]  [<ffffffff86ac7f8e>] dev_attr_show+0x1e/0x50\n[42022.000803]  [<ffffffff86a3eeb1>] sysfs_kf_seq_show+0x81/0xe0\n[42022.006508]  [<ffffffff86a11134>] seq_read_iter+0xf4/0x410\n[42022.011954]  [<ffffffff869f4b2e>] vfs_read+0x16e/0x2f0\n[42022.017058]  [<ffffffff869f50ee>] ksys_read+0x6e/0xe0\n[42022.022073]  [<ffffffff8766f1ca>] do_syscall_64+0x6a/0xa0\n[42022.027441]  [<ffffffff8780013b>] entry_SYSCALL_64_after_hwframe+0x78/0xe2\n\nThe problem can be reproduced using the following steps:\n  ip netns add foo\n  ip netns exec foo bash\n  cat /sys/class/infiniband/mlx4_0/hw_counters/*\n\nThe panic occurs because of casting the device pointer into an\nib_device pointer using container_of() in hw_stat_device_show() is\nwrong and leads to a memory corruption.\n\nHowever the real problem is that hw counters should never been exposed\noutside of the non-init net namespace.\n\nFix this by saving the index of the corresponding attribute group\n(it might be 1 or 2 depending on the presence of driver-specific\nattributes) and zeroing the pointer to hw_counters group for compat\ndevices during the initialization.\n\nWith this fix applied hw_counters are not available in a non-init\nnet namespace:\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters\n    /sys/class/infiniband/mlx4_0/ports/1/hw_counters\n    /sys/class/infiniband/mlx4_0/ports/2/hw_counters\n    /sys/class/infiniband/mlx4_0/hw_counters\n\n  ip netns add foo\n  ip netns exec foo bash\n  find /sys/class/infiniband/mlx4_0/ -name hw_counters","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/0cf80f924aecb5b2bebd4f4ad11b2efc676a0b78","https://git.kernel.org/stable/c/6682da5d8fd578a5068531d01633c9d2e4c8f12b","https://git.kernel.org/stable/c/9a5b7f8842a90a5e6eeff37f9f6d814e61ea3529","https://git.kernel.org/stable/c/a1ecb30f90856b0be4168ad51b8875148e285c1f","https://git.kernel.org/stable/c/c14d9704f5d77a7c7fa46e2114b64a4f75b64e17"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:11.054312287+00:00"},"epss":{"cve":"CVE-2025-22089","score":0.00214,"percentile":0.1173,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}