Vulnerability Description
An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request, causing execve() to incorrectly optimize unshare_fd(), aka CID-0f2122045b94.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.1, < 5.8.18 |
References
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2089ExploitIssue TrackingPatch
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.3PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fPatchVendor Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2089ExploitIssue TrackingPatch
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.3PatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0fPatchVendor Advisory
FAQ
What is CVE-2020-29534?
CVE-2020-29534 is a vulnerability with a CVSS score of 7.8 (HIGH). An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request, causing execve() to incorrectly optimiz...
How severe is CVE-2020-29534?
CVE-2020-29534 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-2020-29534?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.