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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1).
Metrics
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CVE Modified by Canonical Ltd.5/14/2024 5:24:34 AM
Action
Type
Old Value
New Value
Modified Analysis by NIST9/14/2021 10:31:03 AM
Action
Type
Old Value
New Value
Changed
Reference Type
http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html No Types Assigned
http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
Changed
Reference Type
https://security.netapp.com/advisory/ntap-20210716-0004/ No Types Assigned
https://security.netapp.com/advisory/ntap-20210716-0004/ Third Party Advisory
CVE Modified by Canonical Ltd.9/01/2021 2:15:09 PM
OR
*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*
*cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*
Added
CPE Configuration
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (excluding) 5.10.37
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.21
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.4
*cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
Changed
Reference Type
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e No Types Assigned