CVE-2026-29007

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{"bugzilla": {"description": "U-Boot: U-Boot: Out-of-bounds read leads to denial of service via crafted TCP packets", "id": "2498145", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2498145"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-125", "details": ["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.", "A flaw was found in U-Boot. A remote attacker can exploit an out-of-bounds read vulnerability in the `tcp_rx_state_machine()` function when the Transmission Control Protocol (TCP) is enabled. By crafting a malicious packet with a mismatched IP total length and TCP data offset, an attacker can read beyond TCP segment boundaries. This can potentially corrupt connection state variables, leading to a disruption of TCP window calculations and a denial of service."], "name": "CVE-2026-29007", "public_date": "2026-07-08T16:11:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-29007\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-29007\nhttps://lists.denx.de/pipermail/u-boot/2026-May/617853.html\nhttps://u-boot.org/\nhttps://www.vulncheck.com/advisories/u-boot-rc3-out-of-bounds-read-in-tcp-rx-state-machine-via-tcp-c"], "statement": "Red Hat ships U-Boot tools and related Python utility packages in Fedora and EPEL community repositories. The vulnerable code is in U-Boot's TCP state machine (tcp_rx_state_machine in net/tcp.c) and requires CONFIG_PROT_TCP to be enabled at compile time. This vulnerability does not affect any Red Hat product \u2014 only community packages.", "threat_severity": "Moderate"}

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