U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) when CONFIG_PROT_TCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field. Attackers can send a packet with an IP total length of 40 bytes and a TCP data offset claiming 60 bytes of header to cause tcp_parse_options() to read 40 bytes past the end of the TCP segment, potentially corrupting connection state variables such as rmt_win_scale and rmt_timestamp to disrupt TCP window calculations.
Metrics
Affected Vendors & Products
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References
History
Wed, 08 Jul 2026 21:30:00 +0000
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Wed, 08 Jul 2026 16:30:00 +0000
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| Description | U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) when CONFIG_PROT_TCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field. Attackers can send a packet with an IP total length of 40 bytes and a TCP data offset claiming 60 bytes of header to cause tcp_parse_options() to read 40 bytes past the end of the TCP segment, potentially corrupting connection state variables such as rmt_win_scale and rmt_timestamp to disrupt TCP window calculations. | |
| Title | U-Boot 2026.04-rc3 Out-of-Bounds Read in tcp_rx_state_machine via tcp.c | |
| Weaknesses | CWE-125 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-07-08T19:43:25.466Z
Reserved: 2026-03-03T16:42:01.012Z
Link: CVE-2026-29007
Vulnrichment
Updated: 2026-07-08T19:43:21.329Z
NVD
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Redhat
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OpenCVE Enrichment
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