CVE-2026-74418 (GCVE-0-2026-74418)
Vulnerability from cvelistv5
Published
2026-08-15 05:59
Modified
2026-08-17 05:19
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
dma-fence: Fix potential tracepoint null pointer dereferences
Trace_dma_fence_signaled, trace_dma_fence_wait_end and
trace_dma_fence_destroy can all currently dereference a null fence->ops
pointer after it has been reset on fence signalling.
Lets use the safe string getters for most tracepoints to avoid this class
of a problem, while for the signal tracepoint we move it to before ops are
cleared to avoid losing the driver and timeline name information. Apart
from moving it we also need to add a new tracepoint class to bypass the
safe name getters since the signaled bit is already set.
For dma_fence_init we also need to use the new tracepoint class since the
rcu read lock is not held there, and we can do the same for the enable
signaling since there we are certain the fence cannot be signaled while
we are holding the lock and have even validated the fence->ops.
References
Impacted products
{
"containers": {
"cna": {
"affected": [
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"programFiles": [
"drivers/dma-buf/dma-fence.c",
"include/trace/events/dma_fence.h"
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"vendor": "Linux",
"versions": [
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"version": "541c8f2468b933acc5d129e84bd264923675a66e",
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"versionType": "git"
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
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],
"cpeApplicability": [
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}
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"negate": false,
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-fence: Fix potential tracepoint null pointer dereferences\n\nTrace_dma_fence_signaled, trace_dma_fence_wait_end and\ntrace_dma_fence_destroy can all currently dereference a null fence-\u003eops\npointer after it has been reset on fence signalling.\n\nLets use the safe string getters for most tracepoints to avoid this class\nof a problem, while for the signal tracepoint we move it to before ops are\ncleared to avoid losing the driver and timeline name information. Apart\nfrom moving it we also need to add a new tracepoint class to bypass the\nsafe name getters since the signaled bit is already set.\n\nFor dma_fence_init we also need to use the new tracepoint class since the\nrcu read lock is not held there, and we can do the same for the enable\nsignaling since there we are certain the fence cannot be signaled while\nwe are holding the lock and have even validated the fence-\u003eops."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:19:01.013Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/4e01fc9a5bc49b04fad403ffa71299b35e132ca8"
},
{
"url": "https://git.kernel.org/stable/c/e94b9f01543cc6a83538c2c2cc645a424d3015ca"
}
],
"title": "dma-fence: Fix potential tracepoint null pointer dereferences",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-74418",
"datePublished": "2026-08-15T05:59:23.440Z",
"dateReserved": "2026-08-15T05:44:03.893Z",
"dateUpdated": "2026-08-17T05:19:01.013Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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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