Description
An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.
Affected products
netapp: cloud backup; linux: linux kernel; debian: debian linux; oracle: tekelec platform distribution; netapp: solidfire baseboard management controller firmware; netapp: solidfire baseboard management controller
References10
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/comm… Mailing ListPatchVendor Advisory
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/comm… Mailing ListPatchVendor Advisory
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/comm… Mailing ListPatchVendor Advisory
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/comm… Mailing ListPatchVendor Advisory
- www.oracle.com/security-alerts/cpuoct2021.html PatchThird Party Advisory
- www.oracle.com/security-alerts/cpuoct2021.html PatchThird Party Advisory
- blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html ExploitThird Party Advisory
- blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html ExploitThird Party Advisory
- packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security… Third Party AdvisoryVDB Entry
- bugzilla.suse.com/show_bug.cgi?id=1182715 Issue TrackingThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 82 · as of 11 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.