Use After Free in Linux Kernel
CVE-2020-12657
An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- patchwork.kernel.org/patch/11447049/ (Patch, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 (Release Notes, Vendor Advisory)
- github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9 (Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- usn.ubuntu.com/4367-1/ (vendor-advisory)
- usn.ubuntu.com/4368-1/ (vendor-advisory)
- usn.ubuntu.com/4363-1/ (vendor-advisory)
- usn.ubuntu.com/4369-1/ (vendor-advisory)
- security.netapp.com/advisory/ntap-20200608-0001/
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html (vendor-advisory)
Frequently asked questions
- What is CVE-2020-12657?
- CVE-2020-12657 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2020-05-05.
- How severe is CVE-2020-12657?
- High severity. CVSS v3 base score is 7.8 out of 10.