mctp i2c: initialise event handler read bytes
Summary
| CVE | CVE-2026-45865 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 14:16:58 UTC |
| Updated | 2026-06-25 21:07:04 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: mctp i2c: initialise event handler read bytes Set a 0xff value for i2c reads of an mctp-i2c device. Otherwise reads will return "val" from the i2c bus driver. For i2c-aspeed and i2c-npcm7xx that is a stack uninitialised u8. Tested with "i2ctransfer -y 1 r10@0x34" where 0x34 is a mctp-i2c instance, now it returns all 0xff. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.000330000 probability, percentile 0.099750000 (date 2026-06-01)
Problem Types: NVD-CWE-noinfo
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 f5b8abf9fc3dacd7529d363e26fe8230935d65f8 93e01e837e105299f1c259ef71f6e1ec4fe806e3 git | Not specified |
| CNA | Linux | Linux | affected f5b8abf9fc3dacd7529d363e26fe8230935d65f8 11f83253244060b5de5eac787f61ae3f3e559d01 git | Not specified |
| CNA | Linux | Linux | affected f5b8abf9fc3dacd7529d363e26fe8230935d65f8 fa9861e5c8af7651dddfa8d490aaada17ae33b6c git | Not specified |
| CNA | Linux | Linux | affected f5b8abf9fc3dacd7529d363e26fe8230935d65f8 6ff2ebfef75fbc57d937d8fbe738b967edf2d331 git | Not specified |
| CNA | Linux | Linux | affected f5b8abf9fc3dacd7529d363e26fe8230935d65f8 1eeedb310229bfee9dd4d992e5bba33fe1378a8f git | Not specified |
| CNA | Linux | Linux | affected f5b8abf9fc3dacd7529d363e26fe8230935d65f8 2a14e91b6d76639dac70ea170f4384c1ee3cb48d git | Not specified |
| CNA | Linux | Linux | affected 5.18 | Not specified |
| CNA | Linux | Linux | unaffected 5.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.165 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.128 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.75 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.14 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.4 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6ff2ebfef75fbc57d937d8fbe738b967edf2d331 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/11f83253244060b5de5eac787f61ae3f3e559d01 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/1eeedb310229bfee9dd4d992e5bba33fe1378a8f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/93e01e837e105299f1c259ef71f6e1ec4fe806e3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/2a14e91b6d76639dac70ea170f4384c1ee3cb48d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/fa9861e5c8af7651dddfa8d490aaada17ae33b6c | 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.