01 Record

CVE-2026-43093

xsk: tighten UMEM headroom validation to account for tailroom and min frame

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

xsk: tighten UMEM headroom validation to account for tailroom and min frame

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.13% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 3.0% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-06 07:40Z4 MO AGO

Last updated

2026-08-05 12:25Z1 MO AGO

Reserved

2026-05-01

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-131Incorrect Calculation of Buffer SizeBase

Data version

5.2

Document digest

e77a447020b7adeb9a5cd8a56f2297bb53dfc79e63cdaa98e0e557e2d06c9c26

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 5f123bc278bf4e3283d8606321bebbfd299f4384, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 1a6051cd7e3e4c54ff3854a43b638b9292af5e67, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 8769708add9eadeea8041a9761771bb715a87104, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < a03975beb9f6af0d8ac051e30b2abeabe618414f, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 0ec4d3f6e6934deb843b561ae048cd17218e5ad1, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < 6523bc1b40e69301f24c14338b762af4739d6d39, 99e3a236dd43d06c65af0a2ef9cb44306aef6e02 to < a315e022a72d95ef5f1d4e58e903cb492b0ad931, ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee, 25c9cdef57488578da21d99eb614b97ffcf6e59f, 98d3c852e63b49129515dd18c875999efaf8530a, 4.19.118 to < 4.20, 5.4.35 to < 5.5, 5.6.7 to < 5.7, 5.7—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384
git.kernel.orghttps://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67
git.kernel.orghttps://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104
git.kernel.orghttps://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f
git.kernel.orghttps://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1
git.kernel.orghttps://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12
git.kernel.orghttps://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39
git.kernel.orghttps://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931

01 Record index

CVE-2026-43093

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-43093

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References