CVE-2018-17182

Exp

An issue was discovered in the Linux kernel through 4.18.8. The vmacache_flush_all function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations.

Published: 2018-09-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-17182 is rated High Exploit Risk (80.6/100): CVSS High severity, with high exploitation likelihood (EPSS 8.51%, 92th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.04% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-17182

EDB-ID Source Kind Published Link
45497 exploit_db edb 2018-09-26 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-17182

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-05 6.47% 8.51% +2.04%
2 2026-03-18 5.90% 6.47% +0.56%
3 2026-03-17 — 5.90% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-17182

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2018-17182

OS Trackers for CVE-2018-17182

vendor priority summary link
debian not yet assigned CVE-2018-17182 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-17182
redhat high — https://access.redhat.com/security/cve/CVE-2018-17182
suse medium CVE-2018-17182 severity moderate: SUSE including 288 source package names (cluster-md-kmp-azure-4.12.14-5.16.1, cluster-md-kmp-default-4.12.14-120.1, …), 616 product×package rows across 78 product lines (SUSE CaaS Platform 3.0, SUSE CaaS Platform 4.0, … (78 product lines)): Fixed 506, Known Not Affected 110. https://www.suse.com/security/cve/CVE-2018-17182/
ubuntu high CVE-2018-17182 high priority: Ubuntu including 77 source packages (linux, linux-aws, …), 620 status rows across 10 suites (bionic, cosmic, disco, focal, jammy, noble, oracular, trusty, upstream, xenial): DNE 392, not-affected 120, released 97, ignored 11. https://ubuntu.com/security/CVE-2018-17182

Affected software / configurations for CVE-2018-17182

Vendor Product Version Raw CPE
linux linux_kernel >= 3.16, < 3.16.58 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.17, < 3.18.123 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.19, < 4.4.157 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.5, < 4.9.128 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.10, < 4.14.71 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.15, < 4.18.9 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
netapp active_iq_performance_analytics_services — cpe:2.3:a:netapp:active_iq_performance_analytics_services:-:*:*:*:*:*:*:*
netapp element_software — cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*

References for CVE-2018-17182

URL Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2 Patch Third Party Advisory
http://www.securityfocus.com/bid/105417 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/106503 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041748 Patch Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3656 Third Party Advisory
https://github.com/torvalds/linux/commit/7a9cdebdcc17e426fb5287e4a82db1dfe86339b2 Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html Third Party Advisory
https://security.netapp.com/advisory/ntap-20190204-0001/ Patch Third Party Advisory
https://usn.ubuntu.com/3776-1/ Third Party Advisory
https://usn.ubuntu.com/3776-2/ Third Party Advisory
https://usn.ubuntu.com/3777-1/ Third Party Advisory
https://usn.ubuntu.com/3777-2/ Third Party Advisory
https://usn.ubuntu.com/3777-3/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4308 Third Party Advisory
https://www.exploit-db.com/exploits/45497/ Exploit Third Party Advisory VDB Entry
https://www.openwall.com/lists/oss-security/2018/09/18/4 Mailing List Third Party Advisory
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