Answer in brief
CVE-2026-43093 records a High severity (CVSS 7.8) vulnerability in xsk: tighten UMEM headroom validation to account for tailroom and min frame. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <5f123bc278bf4e3283d8606321bebbfd299f4384 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <1a6051cd7e3e4c54ff3854a43b638b9292af5e67 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <8769708add9eadeea8041a9761771bb715a87104 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <a03975beb9f6af0d8ac051e30b2abeabe618414f || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <0ec4d3f6e6934deb843b561ae048cd17218e5ad1 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <6523bc1b40e69301f24c14338b762af4739d6d39 || >=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 <a315e022a72d95ef5f1d4e58e903cb492b0ad931 || ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee || 25c9cdef57488578da21d99eb614b97ffcf6e59f || 98d3c852e63b49129515dd18c875999efaf8530a || >=4.19.118 <4.20 || >=5.4.35 <5.5 || >=5.6.7 <5.7 | 5f123bc278bf4e3283d8606321bebbfd299f4384, 1a6051cd7e3e4c54ff3854a43b638b9292af5e67, 8769708add9eadeea8041a9761771bb715a87104, a03975beb9f6af0d8ac051e30b2abeabe618414f, 0ec4d3f6e6934deb843b561ae048cd17218e5ad1, 9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12, 6523bc1b40e69301f24c14338b762af4739d6d39, a315e022a72d95ef5f1d4e58e903cb492b0ad931, 4.20, 5.5, 5.7 |
| Linux/Linuxgeneric | 5.7 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.