CVE-2021-47291

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

21/05/2024

Last modified:

23/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x

7.10

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.3 (including)	5.4.136 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.54 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.13.6 (excluding)
cpe:2.3:o:linux:linux_kernel:5.14:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.14:rc2::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47291

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools