01 Record
CVE-2026-74221
U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK
HighPUBLISHEDCNA: VulnCheck
CNA base score8.8 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
02 Description
U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK
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
- Not scored by EPSS
- EPSS percentile
- Not scored by EPSS
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Not recorded
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
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
- 2026-09-29 21:29Z52 MIN AGO
- Last updated
- 2026-09-29 21:29Z52 MIN AGO
- Reserved
- 2026-08-14
- Assigning CNA
- VulnCheck
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-195Signed to Unsigned Conversion ErrorVariant
- Data version
- 5.2
- Document digest
- 519a2db172ab276ca80780bab17dfa58ab90b18edccfecf7327cd51c319b96c1
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd
- github.comhttps://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643
- github.comhttps://github.com/u-boot/u-boot
- www.vulncheck.comVulnCheck Advisory: U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINKhttps://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink