CVE-2020-15436
MEDIUMCVSS 6.7/10EPSS 0.93%
Last modified
CVE-2020-15436 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.
Description
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.38, < 4.4.229 |
| Linux | Linux Kernel | >= 4.5, < 4.9.229 |
| Linux | Linux Kernel | >= 4.10, < 4.14.186 |
| Linux | Linux Kernel | >= 4.15, < 4.19.130 |
| Linux | Linux Kernel | >= 4.20, < 5.4.49 |
| Linux | Linux Kernel | >= 5.5, < 5.7.6 |
| Broadcom | Brocade Fabric Operating System Firmware | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | Solidfire \& Hci Management Node | All versions |
| Netapp | Solidfire Baseboard Management Controller Firmware | All versions |
| Netapp | H410c Firmware | All versions |
| Netapp | H610c Firmware | All versions |
| Netapp | H610s Firmware | All versions |
| Netapp | H615c Firmware | All versions |
| Netapp | A700s Firmware | All versions |
| Netapp | Aff 8700 Firmware | All versions |
| Netapp | Fas 8700 Firmware | All versions |
| Netapp | Aff 8300 Firmware | All versions |
| Netapp | Fas 8300 Firmware | All versions |
| Netapp | Aff A400 Firmware | All versions |
| Netapp | Fabric-Attached Storage A400 Firmware | All versions |
| Netapp | A250 Firmware | All versions |
| Netapp | Aff 500f Firmware | All versions |
| Netapp | Fas 500f Firmware | All versions |
References
- https://lkml.org/lkml/2020/6/7/379Exploit, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20201218-0002/Third Party Advisory
- https://lkml.org/lkml/2020/6/7/379Exploit, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20201218-0002/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-15436?
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
How severe is CVE-2020-15436?
CVE-2020-15436 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.
How do I fix CVE-2020-15436?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-15436?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST