CVE-2021-3491
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-3491
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3491.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-3491
- Aliases
-
- A-190877100
- PUB-A-190877100
- Related
- Published
- 2021-06-04T02:15:07Z
- Modified
- 2024-09-18T01:00:21Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("iouring: truncate lengths larger than MAXRWCOUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("iouring: add IORINGOPPROVIDEBUFFERS") (v5.7-rc1).
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db
- https://security.netapp.com/advisory/ntap-20210716-0004/
- https://ubuntu.com/security/notices/USN-4949-1
- https://ubuntu.com/security/notices/USN-4950-1
- https://www.zerodayinitiative.com/advisories/ZDI-21-589/
- https://www.openwall.com/lists/oss-security/2021/05/11/13
- https://security-tracker.debian.org/tracker/CVE-2021-3491
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source