Revert "net/smc: Introduce TCP ULP support" (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.15 % · percentile 4 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/c7cb174a1edc80fe1f75b169a57726ed46704074
- https://git.kernel.org/stable/c/74d33525db50d9d95156c79cc874752654e66e70
- https://git.kernel.org/stable/c/dc824ffc28e5c9d0020b6bee2651b4aceed5b2bf
- https://git.kernel.org/stable/c/dc24e03be0e4bb2aad1a9b272c4f86de3b11969a
- https://git.kernel.org/stable/c/6c505d95c69e27dbf28fea29dc84d2498d69515c
- https://git.kernel.org/stable/c/df31a6b0a3057e66994ad6ccf5d95b9b9514f033
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-35431
- GCVE · GCVE-0-2026-46330
CERT-FR advisories
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0900 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0864 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.17 < 6.19.4
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < c7cb174a1edc80fe1f75b169a57726ed46704074 ; affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < 74d33525db50d9d95156c79cc874752654e66e70 ; affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < dc824ffc28e5c9d0020b6bee2651b4aceed5b2bf ; affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < dc24e03be0e4bb2aad1a9b272c4f86de3b11969a ; affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < 6c505d95c69e27dbf28fea29dc84d2498d69515c ; affected d7cd421da9da2cc7b4d25b8537f66db5c8331c40 < df31a6b0a3057e66994ad6ccf5d95b9b9514f033 |
| Linux · Linux | affected 5.17 ; unaffected 0 < 5.17 ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.160 ≤ 6.6.* ; unaffected 6.12.114 ≤ 6.12.* ; unaffected 6.18.57 ≤ 6.18.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |