Upstream information
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.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | Low | Low |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 6.9 | 6.9 |
| Vector | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | 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 |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | Low | Low |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | u-boot | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | u-boot | Not affected |
| SUSE Linux Enterprise Micro 5.3 | u-boot | Not affected |
| SUSE Linux Enterprise Micro 5.4 | u-boot | Not affected |
| SUSE Linux Enterprise Micro 5.5 | u-boot | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | u-boot | Not affected |
| SUSE Linux Enterprise Server 16.0 | u-boot | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | u-boot | Not affected |
| SUSE Linux Micro 6.0 | u-boot | Affected |
| SUSE Linux Micro 6.1 | u-boot | Affected |
| SUSE Linux Micro 6.2 | u-boot | Affected |
| openSUSE Leap 16.0 | u-boot | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 12 SP5 | u-boot | Not affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | u-boot | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | u-boot | Not affected |
| SUSE Enterprise Storage 6 | u-boot | Not affected |
| SUSE Enterprise Storage 6 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Desktop 15 SP1 | u-boot | Not affected |
| SUSE Linux Enterprise Desktop 15 SP1 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | u-boot | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | u-boot | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | u-boot | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | u-boot | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | u-boot | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | u-boot-rpi3 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | u-boot | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | u-boot | Not affected |
| SUSE Manager Proxy 4.0 | u-boot | Not affected |
| SUSE Manager Proxy 4.0 | u-boot-rpi3 | Not affected |
| SUSE Manager Retail Branch Server 4.0 | u-boot | Not affected |
| SUSE Manager Retail Branch Server 4.0 | u-boot-rpi3 | Not affected |
| SUSE Manager Server 4.0 | u-boot | Not affected |
| SUSE Manager Server 4.0 | u-boot-rpi3 | Not affected |
SUSE Timeline for this CVE
CVE page created: Thu Jul 9 11:25:59 2026CVE page last modified: Thu Jul 9 18:35:59 2026