Vulnerability Description
An issue was discovered in the Linux kernel before 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.
CVSS Score
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.7, < 5.7.16 |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
Related Weaknesses (CWE)
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2Mailing ListPatchRelease Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6dPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20210727-0006/Third Party Advisory
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_tasPatchThird Party Advisory
- https://syzkaller.appspot.com/bug?id=ce5f07d6ec3b5050b8f0728a3b389aa510f2591bPatchThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2Mailing ListPatchRelease Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6dPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20210727-0006/Third Party Advisory
- https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_tasPatchThird Party Advisory
- https://syzkaller.appspot.com/bug?id=ce5f07d6ec3b5050b8f0728a3b389aa510f2591bPatchThird Party Advisory
FAQ
What is CVE-2020-36387?
CVE-2020-36387 is a vulnerability with a CVSS score of 7.8 (HIGH). An issue was discovered in the Linux kernel before 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.
How severe is CVE-2020-36387?
CVE-2020-36387 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-36387?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Netapp H300S Firmware, Netapp H300S, Netapp H500S Firmware, Netapp H500S.