A flaw was found in the Linux kernel’s implementation of MIDI, where an attacker with a local account and the permissions to issue ioctl…

Description

A flaw was found in the Linux kernel’s implementation of MIDI, where an attacker with a local account and the permissions to issue ioctl commands to midi devices could trigger a use-after-free issue. A write to this specific memory while freed and before use causes the flow of execution to change and possibly allow for memory corruption or privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Scores

EPSS (exploitation in 30 days)

1.7% · top 23% of all CVEs (7 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• CWE-416 (opens in a new tab)All about CWE-416 and its CVEs

Affected products

• kernel

  • affected kernel 5.7-rc6

References (4)

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1f6e3c818dd734c30f6a7eeebf232ba2cf3181d (opens in a new tab)x_refsource_MISCx_transferred
• [oss-security] 20201203 Re: Linux Kernel: ALSA: use-after-free Write in snd_rawmidi_kernel_write1 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=1900933 (opens in a new tab)x_refsource_MISCx_transferred
• https://security.netapp.com/advisory/ntap-20210122-0002/ (opens in a new tab)x_refsource_CONFIRMx_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)
• 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

[![CVE-2020-27786](https://trackcve.app/badge/CVE-2020-27786.svg)](https://trackcve.app/cve/CVE-2020-27786)

Record last updated 4 Aug 2024, 16:25 UTC.