CVE-2018-6485: gnu glibc Integer Overflow or Wraparound
Vulnerability summary
CVE-2018-6485 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in gnu glibc. EPSS estimates a 4.69% chance of exploitation in the next 30 days, higher than 91.8% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 5% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 01-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.69%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.69% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Netapp8 products
- cloud_backupna
- data_ontap_edgena
- element_softwarena
- element_software_managementna
- steelstore_cloud_integrated_storagena
Redhat4 products
Oracle2 products
- communications_session_border_controller8.0.0 | 8.1.0 | 8.2.0
- enterprise_communications_broker3.0.0 | 3.1.0
Ubuntu2 products
- eglibc< 2.19-0ubuntu6.15+esm1
- glibc< 2.23-0ubuntu11.2
Debian1 product
- glibc< 2.27-1
Gnu1 product
- glibc≤ 2.26
6 vendors · 18 products
References
14 links
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlX Refsource MISCPatchThird Party Advisory