CVE-2020-8428fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service…
- 7.1HighCVSS base score
- 0.68%Exploitation in 30 daysEPSS · top 47% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.
Timeline
ID reserved
By mitre
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.68% · top 47% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
n/a
- affected n/a
References
References16
- https://www.openwall.com/lists/oss-security/2020/01/28/2 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6 (opens in a new tab)x_refsource_MISCx_transferred
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6 (opens in a new tab)x_refsource_MISCx_transferred
- [oss-security] 20200129 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20200202 Re: Linux kernel: user-triggerable read-after-free crash or 1-bit infoleak oracle in open(2) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://security.netapp.com/advisory/ntap-20200313-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2020:0336 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-4320-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4318-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html (opens in a new tab)x_refsource_MISCx_transferred
- USN-4324-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4325-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-4319-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-4667 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-4698 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-29295 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-8428)Record last updated .