CVE-2025-68379 (GCVE-0-2025-68379)
Vulnerability from cvelistv5
Published
2025-12-24 10:33
Modified
2026-10-16 15:09
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix null deref on srq->rq.queue after resize failure A NULL pointer dereference can occur in rxe_srq_chk_attr() when ibv_modify_srq() is invoked twice in succession under certain error conditions. The first call may fail in rxe_queue_resize(), which leads rxe_srq_from_attr() to set srq->rq.queue = NULL. The second call then triggers a crash (null deref) when accessing srq->rq.queue->buf->index_mask. Call Trace: <TASK> rxe_modify_srq+0x170/0x480 [rdma_rxe] ? __pfx_rxe_modify_srq+0x10/0x10 [rdma_rxe] ? uverbs_try_lock_object+0x4f/0xa0 [ib_uverbs] ? rdma_lookup_get_uobject+0x1f0/0x380 [ib_uverbs] ib_uverbs_modify_srq+0x204/0x290 [ib_uverbs] ? __pfx_ib_uverbs_modify_srq+0x10/0x10 [ib_uverbs] ? tryinc_node_nr_active+0xe6/0x150 ? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs] ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x2c0/0x470 [ib_uverbs] ? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs] ? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs] ib_uverbs_run_method+0x55a/0x6e0 [ib_uverbs] ? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs] ib_uverbs_cmd_verbs+0x54d/0x800 [ib_uverbs] ? __pfx_ib_uverbs_cmd_verbs+0x10/0x10 [ib_uverbs] ? __pfx___raw_spin_lock_irqsave+0x10/0x10 ? __pfx_do_vfs_ioctl+0x10/0x10 ? ioctl_has_perm.constprop.0.isra.0+0x2c7/0x4c0 ? __pfx_ioctl_has_perm.constprop.0.isra.0+0x10/0x10 ib_uverbs_ioctl+0x13e/0x220 [ib_uverbs] ? __pfx_ib_uverbs_ioctl+0x10/0x10 [ib_uverbs] __x64_sys_ioctl+0x138/0x1c0 do_syscall_64+0x82/0x250 ? fdget_pos+0x58/0x4c0 ? ksys_write+0xf3/0x1c0 ? __pfx_ksys_write+0x10/0x10 ? do_syscall_64+0xc8/0x250 ? __pfx_vm_mmap_pgoff+0x10/0x10 ? fget+0x173/0x230 ? fput+0x2a/0x80 ? ksys_mmap_pgoff+0x224/0x4c0 ? do_syscall_64+0xc8/0x250 ? do_user_addr_fault+0x37b/0xfe0 ? clear_bhb_loop+0x50/0xa0 ? clear_bhb_loop+0x50/0xa0 ? clear_bhb_loop+0x50/0xa0 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
Impacted products
Vendor Product Version
Linux Linux Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
Version: 8700e3e7c4857d28ebaa824509934556da0b3e76
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix null deref on srq-\u003erq.queue after resize failure\n\nA NULL pointer dereference can occur in rxe_srq_chk_attr() when\nibv_modify_srq() is invoked twice in succession under certain error\nconditions. The first call may fail in rxe_queue_resize(), which leads\nrxe_srq_from_attr() to set srq-\u003erq.queue = NULL. The second call then\ntriggers a crash (null deref) when accessing\nsrq-\u003erq.queue-\u003ebuf-\u003eindex_mask.\n\nCall Trace:\n\u003cTASK\u003e\nrxe_modify_srq+0x170/0x480 [rdma_rxe]\n? __pfx_rxe_modify_srq+0x10/0x10 [rdma_rxe]\n? uverbs_try_lock_object+0x4f/0xa0 [ib_uverbs]\n? rdma_lookup_get_uobject+0x1f0/0x380 [ib_uverbs]\nib_uverbs_modify_srq+0x204/0x290 [ib_uverbs]\n? __pfx_ib_uverbs_modify_srq+0x10/0x10 [ib_uverbs]\n? tryinc_node_nr_active+0xe6/0x150\n? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs]\nib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x2c0/0x470 [ib_uverbs]\n? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs]\n? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs]\nib_uverbs_run_method+0x55a/0x6e0 [ib_uverbs]\n? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs]\nib_uverbs_cmd_verbs+0x54d/0x800 [ib_uverbs]\n? __pfx_ib_uverbs_cmd_verbs+0x10/0x10 [ib_uverbs]\n? __pfx___raw_spin_lock_irqsave+0x10/0x10\n? __pfx_do_vfs_ioctl+0x10/0x10\n? ioctl_has_perm.constprop.0.isra.0+0x2c7/0x4c0\n? __pfx_ioctl_has_perm.constprop.0.isra.0+0x10/0x10\nib_uverbs_ioctl+0x13e/0x220 [ib_uverbs]\n? __pfx_ib_uverbs_ioctl+0x10/0x10 [ib_uverbs]\n__x64_sys_ioctl+0x138/0x1c0\ndo_syscall_64+0x82/0x250\n? fdget_pos+0x58/0x4c0\n? ksys_write+0xf3/0x1c0\n? __pfx_ksys_write+0x10/0x10\n? do_syscall_64+0xc8/0x250\n? __pfx_vm_mmap_pgoff+0x10/0x10\n? fget+0x173/0x230\n? fput+0x2a/0x80\n? ksys_mmap_pgoff+0x224/0x4c0\n? do_syscall_64+0xc8/0x250\n? do_user_addr_fault+0x37b/0xfe0\n? clear_bhb_loop+0x50/0xa0\n? clear_bhb_loop+0x50/0xa0\n? clear_bhb_loop+0x50/0xa0\nentry_SYSCALL_64_after_hwframe+0x76/0x7e"
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              "value": "AV:L - The required corruption is initiated through a local RDMA uverbs ioctl or write that modifies an attacker-owned RXE SRQ. Network traffic can exercise the damaged queue concurrently, but a remote peer cannot perform the required resize.\nAC:L - The attacker can deliberately fail resizing using an invalid mmap-info destination or controlled queue occupancy, then issue another modification. Any use-after-free race involves attacker-controlled concurrent uverbs calls or traffic.\nPR:L - An unprivileged user can open the mode-0666 uverbs device, create a context, PD, and SRQ, and invoke modify without capability checks. Object lookup requires ownership of the SRQ but no administrative privilege.\nUI:N - Exploitation requires no action by another user; the attacker creates and modifies the affected SRQ directly.\nS:U - The vulnerable RXE code and the affected kernel resources share the same security authority. Kernel compromise or privilege escalation does not inherently cross a CVSS scope boundary.\nC:H - The failure path frees a still-live queue, and shared uobject lookup permits concurrent modify operations to retain and use that freed queue. Heap reclamation can turn this use-after-free and associated double release into kernel-memory disclosure primitives.\nI:H - A concurrent resize can reach resize_finish() with the freed queue, where swap() writes a complete queue header into freed or reallocated slab memory and cleanup can release stale resources again. This provides defensible kernel heap corruption and potential control-flow hijacking.\nA:H - A sequential second modification deterministically dereferences the NULL queue and causes a kernel oops or panic. Concurrent use-after-free paths can likewise crash the system and are repeatable by the attacker."
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    "cveId": "CVE-2025-68379",
    "datePublished": "2025-12-24T10:33:07.538Z",
    "dateReserved": "2025-12-16T14:48:05.311Z",
    "dateUpdated": "2026-10-16T15:09:43.601Z",
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Network traffic can exercise the damaged queue concurrently, but a remote peer cannot perform the required resize.\\nAC:L - The attacker can deliberately fail resizing using an invalid mmap-info destination or controlled queue occupancy, then issue another modification. Any use-after-free race involves attacker-controlled concurrent uverbs calls or traffic.\\nPR:L - An unprivileged user can open the mode-0666 uverbs device, create a context, PD, and SRQ, and invoke modify without capability checks. Object lookup requires ownership of the SRQ but no administrative privilege.\\nUI:N - Exploitation requires no action by another user; the attacker creates and modifies the affected SRQ directly.\\nS:U - The vulnerable RXE code and the affected kernel resources share the same security authority. Kernel compromise or privilege escalation does not inherently cross a CVSS scope boundary.\\nC:H - The failure path frees a still-live queue, and shared uobject lookup permits concurrent modify operations to retain and use that freed queue. Heap reclamation can turn this use-after-free and associated double release into kernel-memory disclosure primitives.\\nI:H - A concurrent resize can reach resize_finish() with the freed queue, where swap() writes a complete queue header into freed or reallocated slab memory and cleanup can release stale resources again. This provides defensible kernel heap corruption and potential control-flow hijacking.\\nA:H - A sequential second modification deterministically dereferences the NULL queue and causes a kernel oops or panic. Concurrent use-after-free paths can likewise crash the system and are repeatable by the attacker.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"58aca869babd48cb9c3d6ee9e1452c4b9f5266a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"b8f6eeb87a76b6fb1f6381b0b2894568e1b784f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"5dbeb421e137824aa9bd8358bdfc926a3965fc0d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"bc4c14a3863cc0e03698caec9a0cdabd779776ee\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"503a5e4690ae14c18570141bc0dcf7501a8419b0\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_srq.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.63\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_srq.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/58aca869babd48cb9c3d6ee9e1452c4b9f5266a6\"}, {\"url\": \"https://git.kernel.org/stable/c/b8f6eeb87a76b6fb1f6381b0b2894568e1b784f7\"}, {\"url\": \"https://git.kernel.org/stable/c/5dbeb421e137824aa9bd8358bdfc926a3965fc0d\"}, {\"url\": \"https://git.kernel.org/stable/c/bc4c14a3863cc0e03698caec9a0cdabd779776ee\"}, {\"url\": \"https://git.kernel.org/stable/c/503a5e4690ae14c18570141bc0dcf7501a8419b0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Fix null deref on srq-\u003erq.queue after resize failure\\n\\nA NULL pointer dereference can occur in rxe_srq_chk_attr() when\\nibv_modify_srq() is invoked twice in succession under certain error\\nconditions. The first call may fail in rxe_queue_resize(), which leads\\nrxe_srq_from_attr() to set srq-\u003erq.queue = NULL. The second call then\\ntriggers a crash (null deref) when accessing\\nsrq-\u003erq.queue-\u003ebuf-\u003eindex_mask.\\n\\nCall Trace:\\n\u003cTASK\u003e\\nrxe_modify_srq+0x170/0x480 [rdma_rxe]\\n? __pfx_rxe_modify_srq+0x10/0x10 [rdma_rxe]\\n? uverbs_try_lock_object+0x4f/0xa0 [ib_uverbs]\\n? rdma_lookup_get_uobject+0x1f0/0x380 [ib_uverbs]\\nib_uverbs_modify_srq+0x204/0x290 [ib_uverbs]\\n? __pfx_ib_uverbs_modify_srq+0x10/0x10 [ib_uverbs]\\n? tryinc_node_nr_active+0xe6/0x150\\n? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs]\\nib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x2c0/0x470 [ib_uverbs]\\n? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs]\\n? uverbs_fill_udata+0xed/0x4f0 [ib_uverbs]\\nib_uverbs_run_method+0x55a/0x6e0 [ib_uverbs]\\n? __pfx_ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x10/0x10 [ib_uverbs]\\nib_uverbs_cmd_verbs+0x54d/0x800 [ib_uverbs]\\n? __pfx_ib_uverbs_cmd_verbs+0x10/0x10 [ib_uverbs]\\n? __pfx___raw_spin_lock_irqsave+0x10/0x10\\n? __pfx_do_vfs_ioctl+0x10/0x10\\n? ioctl_has_perm.constprop.0.isra.0+0x2c7/0x4c0\\n? __pfx_ioctl_has_perm.constprop.0.isra.0+0x10/0x10\\nib_uverbs_ioctl+0x13e/0x220 [ib_uverbs]\\n? __pfx_ib_uverbs_ioctl+0x10/0x10 [ib_uverbs]\\n__x64_sys_ioctl+0x138/0x1c0\\ndo_syscall_64+0x82/0x250\\n? fdget_pos+0x58/0x4c0\\n? ksys_write+0xf3/0x1c0\\n? __pfx_ksys_write+0x10/0x10\\n? do_syscall_64+0xc8/0x250\\n? __pfx_vm_mmap_pgoff+0x10/0x10\\n? fget+0x173/0x230\\n? fput+0x2a/0x80\\n? ksys_mmap_pgoff+0x224/0x4c0\\n? do_syscall_64+0xc8/0x250\\n? do_user_addr_fault+0x37b/0xfe0\\n? clear_bhb_loop+0x50/0xa0\\n? clear_bhb_loop+0x50/0xa0\\n? clear_bhb_loop+0x50/0xa0\\nentry_SYSCALL_64_after_hwframe+0x76/0x7e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.63\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.13\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.2\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:11:07.159Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-68379\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-16T15:09:43.601Z\", \"dateReserved\": \"2025-12-16T14:48:05.311Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-24T10:33:07.538Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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