9.8

CVE-2017-18269: gnu glibc

Modified
AliasesUBUNTU-CVE-2017-18269DEBIAN-CVE-2017-18269
Published 18-05-2018Last modified 05-08-2024

Vulnerability summary

CVE-2017-18269 is a critical (CVSS 9.8) vulnerability in gnu glibc. EPSS estimates a 4.54% chance of exploitation in the next 30 days, higher than 91.5% of scored vulnerabilities.

Priority
Prioritisesevere

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?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
4.54%
0%100%
Low · -0.09 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 5
MGASA-2018-0293OPENSUSE-SU-2024:10792-1SUSE-SU-2018:1562-1SUSE-SU-2018:1562-2SUSE-SU-2018:1991-1USN-4416-1

Timeline

  1. 18-05-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping memory check if the source memory range spans the middle of the address space, resulting in corrupt data being produced by the copy operation. This may disclose information to context-dependent attackers, or result in a denial of service, or, possibly, code execution.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

4.54%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

Decrease -0.09 pp

From 4.63% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • glibc< 2.27-3
Gnu1 product
Ubuntu1 product
  • glibc< 2.23-0ubuntu11.2

3 vendors · 3 products

References

10 links