fou: Don't allow 0 for FOU_ATTR_IPPROTO.
Summary
| CVE | CVE-2026-23083 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-04 17:16:19 UTC |
| Updated | 2026-07-14 13:18:23 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let's forbid 0 for FOU_ATTR_IPPROTO. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: NVD-CWE-noinfo
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 c7498f9bc390479ccfad7c7f2332237ff4945b03 git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 6e983789b7588ee59cbf303583546c043bad8e19 git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 1cc98b8887cabb1808d2f4a37cd10a7be7574771 git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 b7db31a52c3862a1a32202a273a4c32e7f5f4823 git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 9b75dff8446ec871030d8daf5a69e74f5fe8b956 git | Not specified |
| CNA | Linux | Linux | affected 23461551c00628c3f3fe9cf837bf53cf8f212b63 7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5 git | Not specified |
| CNA | Linux | Linux | affected 3.18 | Not specified |
| CNA | Linux | Linux | unaffected 3.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.249 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.199 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.162 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.122 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.68 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.8 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19 * original_commit_for_fix | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.6 * custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.6 * custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | affected V3.1.6 * custom | Not specified |
| ADP | Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | affected V3.1.6 * custom | Not specified |
| ADP | Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | affected V3.1.6 * custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/1cc98b8887cabb1808d2f4a37cd10a7be7574771 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/6e983789b7588ee59cbf303583546c043bad8e19 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/7a9bc9e3f42391e4c187e099263cf7a1c4b69ff5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| cert-portal.siemens.com/productcert/html/ssa-019113.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| git.kernel.org/stable/c/9b75dff8446ec871030d8daf5a69e74f5fe8b956 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/c7498f9bc390479ccfad7c7f2332237ff4945b03 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/b7db31a52c3862a1a32202a273a4c32e7f5f4823 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.