kernel: net/rxrpc: overflow in decoding of krb5 principal
Published Jul 30, 2018
7.8
HIGHCVSS 3.1
EPSS 0.47%
Description
In the Linux kernel before version 4.12, Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.
Affected products
- Vendor n/a Product Kernel: Defaultn/a
- Version 4.12StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel: | n/a |
|
Configuration 1
- < 3.2.90
- ≥ 3.3 · < 3.10.108
- ≥ 3.11 · < 3.16.45
- ≥ 3.17 · < 3.18.59
- ≥ 3.19 · < 4.1.43
- ≥ 4.2 · < 4.4.75
- ≥ 4.5 · < 4.9.35
- ≥ 4.10 · < 4.11.8
Configuration 2
- 8.0
- 9.0
- 2.0
No data.
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-693.46.1.rt56.639.el6rt
Fixed · RHSA-2019:0641
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-693.46.1.rt56.639.el6rt | Fixed | RHSA-2019:0641 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6 and 7 as the module is not enabled on these systems. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise MRG-2. Future Linux kernel updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.47% (0.00470) | 38.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.47% (0.00474) | 37.06th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00090) | 23.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.06% (0.00062) | 26.81th | v3 (v2023.03.01) |
| Jul 24, 2023 | 0.06% (0.00062) | 24.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.53% (0.01527) | 33.44th | v1 |
| Jan 6, 2022 | 1.53% (0.01527) | 32.75th | v1 |
| Sep 1, 2021 | 1.53% (0.01527) | 72.59th | v1 |
| Apr 14, 2021 | 1.53% (0.01527) | 0.00th | v1 |
References (12)
- http://seclists.org/oss-sec/2017/q2/602 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/99299 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038787 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:0641 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-7482 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1446288 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0 x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-7482
- https://www.cve.org/CVERecord?id=CVE-2017-7482
- https://www.debian.org/security/2017/dsa-3927 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.debian.org/security/2017/dsa-3945 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.