kernel: information leak in the IPv4 implementation
Published Dec 25, 2021
3.5
LOWCVSS 3.1
EPSS 0.37%
Description
In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.
Affected products
No data.
Configuration 1
- < 5.12.4
Configuration 2
- 22.1.3
- 22.1.1
- 22.2.0
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-372.9.1.el8
Fixed · RHSA-2022:1988
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-372.9.1.rt7.166.el8
Fixed · RHSA-2022:1975
Red Hat Enterprise Linux 8.4 Extended Update Support
kernel-0:4.18.0-305.65.1.el8_4
Fixed · RHSA-2022:6983
Red Hat Enterprise Linux 8.4 Extended Update Support
kernel-rt-0:4.18.0-305.65.1.rt7.137.el8_4
Fixed · RHSA-2022:6991
Red Hat Enterprise Linux 6
kernel
Affected
Red Hat Enterprise Linux 7
kernel
Affected
Red Hat Enterprise Linux 7
kernel-rt
Affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-372.9.1.el8 | Fixed | RHSA-2022:1988 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-372.9.1.rt7.166.el8 | Fixed | RHSA-2022:1975 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | kernel-0:4.18.0-305.65.1.el8_4 | Fixed | RHSA-2022:6983 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | kernel-rt-0:4.18.0-305.65.1.rt7.137.el8_4 | Fixed | RHSA-2022:6991 |
| Red Hat Enterprise Linux 6 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References (9)
- https://access.redhat.com/security/cve/CVE-2021-45486 Vendor Advisory
- https://arxiv.org/pdf/2112.09604.pdf x_refsource_MISCTechnical DescriptionThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2039914 Issue Tracking
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 x_refsource_MISCRelease NotesVendor Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-32252 Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba x_refsource_MISCPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-45486
- https://www.cve.org/CVERecord?id=CVE-2021-45486
- https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISCPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-45486 | Vendor Advisory | |
| https://arxiv.org/pdf/2112.09604.pdf | x_refsource_MISCTechnical DescriptionThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2039914 | Issue Tracking | |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 | x_refsource_MISCRelease NotesVendor Advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-32252 | Advisory | |
| https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba | x_refsource_MISCPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2021-45486 | ||
| https://www.cve.org/CVERecord?id=CVE-2021-45486 | ||
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISCPatchThird Party Advisory |
Change history (0)
No recorded changes yet.