Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Revert "net/smc: Introduce TCP ULP support" This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40. As reported by Al Viro, the TCP ULP support for SMC is fundamentally broken. The implementation attempts to convert an active TCP socket into an SMC socket by modifying the underlying `struct file`, dentry, and inode in-place, which violates core VFS invariants that assume these structures are immutable for an open file, creating a risk of use after free errors and general system instability. Given the severity of this design flaw and the fact that cleaner alternatives (e.g., LD_PRELOAD, BPF) exist for legacy application transparency, the correct course of action is to remove this feature entirely.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.17, < 6.19.4 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/6c505d95c69e27dbf28fea29dc84d2498d69515cPatch
- https://git.kernel.org/stable/c/df31a6b0a3057e66994ad6ccf5d95b9b9514f033Patch
FAQ
What is CVE-2026-46330?
CVE-2026-46330 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: Revert "net/smc: Introduce TCP ULP support" This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40. As reported by Al Viro,...
How severe is CVE-2026-46330?
CVE-2026-46330 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46330?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.