Overview
- Description
- A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.
- Source
- secalert@redhat.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
CVSS 3.0
- Type
- Secondary
- Base score
- 6.2
- Impact score
- 3.6
- Exploitability score
- 2.5
- Vector string
- CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 7.2
- Impact score
- 10
- Exploitability score
- 3.9
- Vector string
- AV:L/AC:L/Au:N/C:C/I:C/A:C
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4D8FF6C2-F49F-483D-A9E2-2DAE73483C7C",
"versionEndExcluding": "4.14.8",
"versionStartIncluding": "4.14"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B6EF6556-06A6-4700-B61F-533167096BEF"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "69A04496-EA26-42E0-A553-413BF2A78AD7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "14E8986E-B317-40EA-B0B5-5D2922D2AF5B"
}
],
"operator": "OR"
}
]
}
]