VulnerabilityModified
CVE-2021-41073
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
HIGH 7.8EPSS 1.70%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.70%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.70% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-763
- Affected
- linux/linux kernel · debian/debian linux · fedoraproject/fedora · netapp/cloud backup · netapp/solidfire baseboard management controller · netapp/h410c firmware · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h300e firmware · netapp/h500e firmware · netapp/h700e firmware · netapp/h410s firmware
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930ccPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
- https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930ccPatch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
- https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.