HIGH
kernel: out-of-bound access in ext4_ext_drop_refs function with a crafted ext4 image
Published Jul 18, 2018
7.3
HIGHCVSS 3.0
EPSS 2.22%
Description
Linux kernel ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function when operating on a crafted ext4 filesystem image.
Affected products
- Vendor n/a Product Kernel Defaultn/a
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
OR
- 14.04
- 16.04
- 18.04
Configuration 2
OR
- 4.16
- 4.17
Configuration 3
- 8.0
Configuration 4
- 7.0
No data.
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.el7a
Fixed · RHSA-2018:2948
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-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.el7a | Fixed | RHSA-2018:2948 |
| 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-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (Red Hat) ▾
7.3 HIGH Red Hat
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.22% 0.02223
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.02223
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.22% (0.02223) | 82.09th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.25% (0.02252) | 80.58th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.47% (0.00470) | 62.54th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00063) | 28.92th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00063) | 27.05th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.06% (0.00063) | 25.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.68% (0.02678) | 55.40th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.68% (0.02678) | 0.00th | v1 |
Weaknesses (1)
References (16)
- http://www.securityfocus.com/bid/104878 vdb-entryx_refsource_BID
- http://www.securityfocus.com/bid/106503 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-10877 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1596795 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10877 x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-10877
- https://usn.ubuntu.com/3753-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3753-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3871-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3871-3/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3871-4/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3871-5/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-10877
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104878 | vdb-entryx_refsource_BID | |
| http://www.securityfocus.com/bid/106503 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHSA-2018:2948 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-10877 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1596795 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10877 | x_refsource_CONFIRMIssue TrackingPatchVendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-10877 | ||
| https://usn.ubuntu.com/3753-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3753-2/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3754-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3871-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3871-3/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3871-4/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3871-5/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-10877 |
Change history (6)
- MITRE
- CVSS severity changed from MEDIUM to
HIGH MEDIUM → HIGH
- CVSS vector changed from CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H to
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H → CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- CVSS score changed from 5.2 to
7.3 5.2 → 7.3
- CVSS severity changed from MEDIUM to
HIGH
- REDHAT
- CVSS severity changed from HIGH to
MEDIUM HIGH → MEDIUM
- CVSS vector changed from CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H to
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H → CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- CVSS score changed from 7.3 to
5.2 7.3 → 5.2
- CVSS severity changed from HIGH to
MEDIUM
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Jul 18, 2018
Updated Aug 5, 2024
Reserved May 9, 2018
Link CVE-2018-10877
CISA Vulnrichment
Updated n/a