Use After Free in Linux Kernel
CVE-2020-25669
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
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: 0.006 (49.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2020/11/05/2 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/11/20/5 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/12/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/12/msg00027.html (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/11/05/2,
- www.openwall.com/lists/oss-security/2020/11/20/5,
- github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210702-0006/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-25669?
- CVE-2020-25669 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2021-05-26.
- How severe is CVE-2020-25669?
- High severity. CVSS v3 base score is 7.8 out of 10.