CVE-2025-21650 (GCVE-0-2025-21650)
Vulnerability from cvelistv5
Published
2025-01-19 10:18
Modified
2026-08-05 11:53
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hns3: fixed hclge_fetch_pf_reg accesses bar space out of bounds issue The TQP BAR space is divided into two segments. TQPs 0-1023 and TQPs 1024-1279 are in different BAR space addresses. However, hclge_fetch_pf_reg does not distinguish the tqp space information when reading the tqp space information. When the number of TQPs is greater than 1024, access bar space overwriting occurs. The problem of different segments has been considered during the initialization of tqp.io_base. Therefore, tqp.io_base is directly used when the queue is read in hclge_fetch_pf_reg. The error message: Unable to handle kernel paging request at virtual address ffff800037200000 pc : hclge_fetch_pf_reg+0x138/0x250 [hclge] lr : hclge_get_regs+0x84/0x1d0 [hclge] Call trace: hclge_fetch_pf_reg+0x138/0x250 [hclge] hclge_get_regs+0x84/0x1d0 [hclge] hns3_get_regs+0x2c/0x50 [hns3] ethtool_get_regs+0xf4/0x270 dev_ethtool+0x674/0x8a0 dev_ioctl+0x270/0x36c sock_do_ioctl+0x110/0x2a0 sock_ioctl+0x2ac/0x530 __arm64_sys_ioctl+0xa8/0x100 invoke_syscall+0x4c/0x124 el0_svc_common.constprop.0+0x140/0x15c do_el0_svc+0x30/0xd0 el0_svc+0x1c/0x2c el0_sync_handler+0xb0/0xb4 el0_sync+0x168/0x180
References
Impacted products
Vendor Product Version
Linux Linux Version: 939ccd107ffcade20c9c7055a2e7ae0fd724fb72
Version: 939ccd107ffcade20c9c7055a2e7ae0fd724fb72
Version: df34972a33d268a7113c119fe4e4b07a6819aa0c
Version: 2b1fff96a297034f03466cfecda9824adafe16ed
Version: 6.4.16   ≤
Version: 6.5.3   ≤
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No remote or adjacent-network input reaches this path.\\nAC:L - On an affected HNS3 PF (\\u22651024 TQPs assigned to the PF vport, which is the default when SR-IOV is not enabled), a single `ethtool -d ethX` deterministically walks past the end of the BAR2 mapping; there is no race, no memory-layout dependency, and no state the attacker cannot arrange.\\nPR:L - `ETHTOOL_GREGS` is gated on `ns_capable(net-\u003euser_ns, CAP_NET_ADMIN)`, not on real root \\u2014 a non-root telemetry/monitoring process holding only `cap_net_admin+ep`, or a container process with CAP_NET_ADMIN over a delegated network namespace holding the hns3 netdev, can reach it without any administrative account.\\nUI:N - The attacker issues the ethtool ioctl directly; no victim action, mount, or file open is required.\\nS:U - The out-of-bounds MMIO access and its consequences are entirely contained within the kernel of the same host, with no crossing of a VM, IOMMU, or sandbox authority boundary.\\nC:H - The defect is an out-of-bounds read spanning up to ~128 KB beyond the ioremapped BAR2 window, and every value read is copied straight to userspace by `ethtool_get_regs()` \\u2014 far beyond a \\\"few bounded bytes\\\", so on BAR layouts where the accesses do not immediately fault it discloses register/MMIO content the caller was never meant to see.\\nI:N - The destination buffer is correctly sized by `hclge_get_regs_len()` using the same `kinfo-\u003enum_tqps`, so there is no out-of-bounds write; the erroneous accesses are read-only MMIO loads with no attacker-controlled modification of kernel state.\\nA:H - The first out-of-bounds access lands on unmapped vmalloc space, producing the \\\"Unable to handle kernel paging request at virtual address ffff800037200000\\\" oops recorded in the fix commit \\u2014 a kernel crash that any permitted caller can trigger repeatedly.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"939ccd107ffcade20c9c7055a2e7ae0fd724fb72\", \"lessThan\": \"0575baa733fc4219f230aef22d5bc35d922f1e9a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"939ccd107ffcade20c9c7055a2e7ae0fd724fb72\", \"lessThan\": \"7997ddd46c54408bcba5e37fe18b4d832e45d4d4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df34972a33d268a7113c119fe4e4b07a6819aa0c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2b1fff96a297034f03466cfecda9824adafe16ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6.4.16\", \"lessThan\": \"6.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.5.3\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}], \"programFiles\": [\"drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_regs.c\", \"drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_regs.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.12.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_regs.c\", \"drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_regs.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0575baa733fc4219f230aef22d5bc35d922f1e9a\"}, {\"url\": \"https://git.kernel.org/stable/c/7997ddd46c54408bcba5e37fe18b4d832e45d4d4\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hns3: fixed hclge_fetch_pf_reg accesses bar space out of bounds issue\\n\\nThe TQP BAR space is divided into two segments. TQPs 0-1023 and TQPs\\n1024-1279 are in different BAR space addresses. However,\\nhclge_fetch_pf_reg does not distinguish the tqp space information when\\nreading the tqp space information. When the number of TQPs is greater\\nthan 1024, access bar space overwriting occurs.\\nThe problem of different segments has been considered during the\\ninitialization of tqp.io_base. 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}


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