PT-2018-2983 · Linux+5 · Linux Kernel+5
Published
2018-10-05
·
Updated
2024-06-21
·
CVE-2018-18445
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions 4.14.x through 4.18.x before 4.18.13
Description
The issue is caused by faulty computation of numeric bounds in the BPF verifier, which permits out-of-bounds memory accesses. This is due to the mishandling of 32-bit right shifts by the
adjust scalar min max vals function in kernel/bpf/verifier.c. The vulnerability can be exploited to elevate privileges.Recommendations
For Linux kernel versions 4.14.x through 4.18.x before 4.18.13, update to version 4.18.13 or later to resolve the issue. As a temporary workaround, consider restricting the use of the BPF verifier until a patch is available. Avoid using the
adjust scalar min max vals function in the kernel/bpf/verifier.c file until the issue is resolved.Fix
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu