CVE-2025-68216 (GCVE-0-2025-68216)
Vulnerability from cvelistv5
Published
2025-12-16 13:57
Modified
2025-12-16 13:57
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: BPF: Disable trampoline for kernel module function trace
The current LoongArch BPF trampoline implementation is incompatible
with tracing functions in kernel modules. This causes several severe
and user-visible problems:
* The `bpf_selftests/module_attach` test fails consistently.
* Kernel lockup when a BPF program is attached to a module function [1].
* Critical kernel modules like WireGuard experience traffic disruption
when their functions are traced with fentry [2].
Given the severity and the potential for other unknown side-effects, it
is safest to disable the feature entirely for now. This patch prevents
the BPF subsystem from allowing trampoline attachments to kernel module
functions on LoongArch.
This is a temporary mitigation until the core issues in the trampoline
code for kernel module handling can be identified and fixed.
[root@fedora bpf]# ./test_progs -a module_attach -v
bpf_testmod.ko is already unloaded.
Loading bpf_testmod.ko...
Successfully loaded bpf_testmod.ko.
test_module_attach:PASS:skel_open 0 nsec
test_module_attach:PASS:set_attach_target 0 nsec
test_module_attach:PASS:set_attach_target_explicit 0 nsec
test_module_attach:PASS:skel_load 0 nsec
libbpf: prog 'handle_fentry': failed to attach: -ENOTSUPP
libbpf: prog 'handle_fentry': failed to auto-attach: -ENOTSUPP
test_module_attach:FAIL:skel_attach skeleton attach failed: -524
Summary: 0/0 PASSED, 0 SKIPPED, 1 FAILED
Successfully unloaded bpf_testmod.ko.
[1]: https://lore.kernel.org/loongarch/CAK3+h2wDmpC-hP4u4pJY8T-yfKyk4yRzpu2LMO+C13FMT58oqQ@mail.gmail.com/
[2]: https://lore.kernel.org/loongarch/CAK3+h2wYcpc+OwdLDUBvg2rF9rvvyc5amfHT-KcFaK93uoELPg@mail.gmail.com/
References
Impacted products
{
"containers": {
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"programFiles": [
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"versions": [
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"version": "6.17"
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"version": "0",
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"version": "6.18",
"versionType": "original_commit_for_fix"
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: BPF: Disable trampoline for kernel module function trace\n\nThe current LoongArch BPF trampoline implementation is incompatible\nwith tracing functions in kernel modules. This causes several severe\nand user-visible problems:\n\n* The `bpf_selftests/module_attach` test fails consistently.\n* Kernel lockup when a BPF program is attached to a module function [1].\n* Critical kernel modules like WireGuard experience traffic disruption\n when their functions are traced with fentry [2].\n\nGiven the severity and the potential for other unknown side-effects, it\nis safest to disable the feature entirely for now. This patch prevents\nthe BPF subsystem from allowing trampoline attachments to kernel module\nfunctions on LoongArch.\n\nThis is a temporary mitigation until the core issues in the trampoline\ncode for kernel module handling can be identified and fixed.\n\n[root@fedora bpf]# ./test_progs -a module_attach -v\nbpf_testmod.ko is already unloaded.\nLoading bpf_testmod.ko...\nSuccessfully loaded bpf_testmod.ko.\ntest_module_attach:PASS:skel_open 0 nsec\ntest_module_attach:PASS:set_attach_target 0 nsec\ntest_module_attach:PASS:set_attach_target_explicit 0 nsec\ntest_module_attach:PASS:skel_load 0 nsec\nlibbpf: prog \u0027handle_fentry\u0027: failed to attach: -ENOTSUPP\nlibbpf: prog \u0027handle_fentry\u0027: failed to auto-attach: -ENOTSUPP\ntest_module_attach:FAIL:skel_attach skeleton attach failed: -524\nSummary: 0/0 PASSED, 0 SKIPPED, 1 FAILED\nSuccessfully unloaded bpf_testmod.ko.\n\n[1]: https://lore.kernel.org/loongarch/CAK3+h2wDmpC-hP4u4pJY8T-yfKyk4yRzpu2LMO+C13FMT58oqQ@mail.gmail.com/\n[2]: https://lore.kernel.org/loongarch/CAK3+h2wYcpc+OwdLDUBvg2rF9rvvyc5amfHT-KcFaK93uoELPg@mail.gmail.com/"
}
],
"providerMetadata": {
"dateUpdated": "2025-12-16T13:57:11.303Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/44eb3849378be5f72b8be03edbacbdcd6f5eade4"
},
{
"url": "https://git.kernel.org/stable/c/677e6123e3d24adaa252697dc89740f2ac07664e"
}
],
"title": "LoongArch: BPF: Disable trampoline for kernel module function trace",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-68216",
"datePublished": "2025-12-16T13:57:11.303Z",
"dateReserved": "2025-12-16T13:41:40.256Z",
"dateUpdated": "2025-12-16T13:57:11.303Z",
"state": "PUBLISHED"
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"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-68216\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:54.627\",\"lastModified\":\"2025-12-18T15:08:06.237\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nLoongArch: BPF: Disable trampoline for kernel module function trace\\n\\nThe current LoongArch BPF trampoline implementation is incompatible\\nwith tracing functions in kernel modules. This causes several severe\\nand user-visible problems:\\n\\n* The `bpf_selftests/module_attach` test fails consistently.\\n* Kernel lockup when a BPF program is attached to a module function [1].\\n* Critical kernel modules like WireGuard experience traffic disruption\\n when their functions are traced with fentry [2].\\n\\nGiven the severity and the potential for other unknown side-effects, it\\nis safest to disable the feature entirely for now. This patch prevents\\nthe BPF subsystem from allowing trampoline attachments to kernel module\\nfunctions on LoongArch.\\n\\nThis is a temporary mitigation until the core issues in the trampoline\\ncode for kernel module handling can be identified and fixed.\\n\\n[root@fedora bpf]# ./test_progs -a module_attach -v\\nbpf_testmod.ko is already unloaded.\\nLoading bpf_testmod.ko...\\nSuccessfully loaded bpf_testmod.ko.\\ntest_module_attach:PASS:skel_open 0 nsec\\ntest_module_attach:PASS:set_attach_target 0 nsec\\ntest_module_attach:PASS:set_attach_target_explicit 0 nsec\\ntest_module_attach:PASS:skel_load 0 nsec\\nlibbpf: prog \u0027handle_fentry\u0027: failed to attach: -ENOTSUPP\\nlibbpf: prog \u0027handle_fentry\u0027: failed to auto-attach: -ENOTSUPP\\ntest_module_attach:FAIL:skel_attach skeleton attach failed: -524\\nSummary: 0/0 PASSED, 0 SKIPPED, 1 FAILED\\nSuccessfully unloaded bpf_testmod.ko.\\n\\n[1]: https://lore.kernel.org/loongarch/CAK3+h2wDmpC-hP4u4pJY8T-yfKyk4yRzpu2LMO+C13FMT58oqQ@mail.gmail.com/\\n[2]: https://lore.kernel.org/loongarch/CAK3+h2wYcpc+OwdLDUBvg2rF9rvvyc5amfHT-KcFaK93uoELPg@mail.gmail.com/\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/44eb3849378be5f72b8be03edbacbdcd6f5eade4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/677e6123e3d24adaa252697dc89740f2ac07664e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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