CVE-2020-29374

Description

An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.

CVSS breakdown

Affected products

• Debian / debian_linux9.0 – 9.0
• Debian / debian_linux10.0 – 10.0
• Linux / Linux kernel5.7.3
• NetApp / 500f_firmware
• NetApp / a250_firmware
• NetApp / h410c_firmware
• NetApp / hci_compute_node_bios
• NetApp / solidfire_&_hci_management_node
• NetApp / solidfire_&_hci_storage_node

References

• MISChttps://bugs.chromium.org/p/project-zero/issues/detail?id=2045
• MISChttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3
• MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f
• MISChttps://security.netapp.com/advisory/ntap-20210115-0002/
• EXPLOIThttp://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
• VENDOR_ADVISORYhttps://www.debian.org/security/2022/dsa-5096