CVE-2026-74220
8.8
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
Summary
U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| u-boot | u-boot | 0 < 2026.10-rc5 | affected |
Weaknesses
- CWE-195: Signed to Unsigned Conversion Error
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/u-boot/u-boot/commit/0bbf09859658b8cc9ac13be41af23b516b8ef69a
- https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L695
- https://github.com/u-boot/u-boot
- https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-read-reply
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