CVE-2021-3491
Vulnerability from cvelistv5
Published
2021-06-04 01:40
Modified
2024-09-16 22:09
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw 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 ("io_uring: truncate lengths larger than MAX_RW_COUNT 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 ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).
References
security@ubuntu.comhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582dbPatch, Vendor Advisory
security@ubuntu.comhttps://security.netapp.com/advisory/ntap-20210716-0004/Third Party Advisory
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-4949-1Third Party Advisory
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-4950-1Third Party Advisory
security@ubuntu.comhttps://www.openwall.com/lists/oss-security/2021/05/11/13Mailing List, Patch, Third Party Advisory
security@ubuntu.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-589/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582dbPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210716-0004/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/notices/USN-4949-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/notices/USN-4950-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2021/05/11/13Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-589/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
Linux Linux kernel Version: trunk   < v5.13-rc4
Version: linux-5.12.y   < v5.12.4
Version: linux-5.11.y   < v5.11.21
Version: linux-5.10.y   < v5.10.37
Version: v5.7-rc1   < 5.7*
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