CVE-2026-43093 (GCVE-0-2026-43093)
Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-08 12:40
VLAI?
Title
xsk: tighten UMEM headroom validation to account for tailroom and min frame
Summary
In the Linux kernel, the following vulnerability has been resolved:
xsk: tighten UMEM headroom validation to account for tailroom and min frame
The current headroom validation in xdp_umem_reg() could leave us with
insufficient space dedicated to even receive minimum-sized ethernet
frame. Furthermore if multi-buffer would come to play then
skb_shared_info stored at the end of XSK frame would be corrupted.
HW typically works with 128-aligned sizes so let us provide this value
as bare minimum.
Multi-buffer setting is known later in the configuration process so
besides accounting for 128 bytes, let us also take care of tailroom space
upfront.
Severity ?
7.8 (High)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < a03975beb9f6af0d8ac051e30b2abeabe618414f
(git)
Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 0ec4d3f6e6934deb843b561ae048cd17218e5ad1 (git) Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 (git) Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < 6523bc1b40e69301f24c14338b762af4739d6d39 (git) Affected: 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 , < a315e022a72d95ef5f1d4e58e903cb492b0ad931 (git) Affected: ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee (git) Affected: 25c9cdef57488578da21d99eb614b97ffcf6e59f (git) Affected: 98d3c852e63b49129515dd18c875999efaf8530a (git) |
||
{
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"programFiles": [
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],
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},
{
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"version": "6.12.83",
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},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
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}
],
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}
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"providerMetadata": {
"dateUpdated": "2026-05-08T12:40:30.221Z",
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"title": "xsk: tighten UMEM headroom validation to account for tailroom and min frame",
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"datePublished": "2026-05-06T07:40:25.266Z",
"dateReserved": "2026-05-01T14:12:55.984Z",
"dateUpdated": "2026-05-08T12:40:30.221Z",
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"date": "2026-05-08",
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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