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CVE-2026-29007

MEDIUM
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-29007
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-03-03 16:42 UTC
Published
2026-07-08 16:11 UTC
Last updated
2026-07-08 19:43 UTC
Primary CWE
CWE-125
Out-of-bounds Read
Vendor / Product
u-boot / u-boot
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
u-boot u-boot — 0 ≤ 2026.04-rc3
Weakness (CWE)
CWESourceDescription
CWE-125 cna Out-of-bounds Read
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.9 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References (3)
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