9.8

CVE-2023-46853: memcached Off-by-one Error

Modified
AliasesUBUNTU-CVE-2023-46853DEBIAN-CVE-2023-46853
Published 27-10-2023Last modified 09-09-2024

Vulnerability summary

CVE-2023-46853 is a critical (CVSS 9.8) Off-by-one Error vulnerability in memcached. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 59.1% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.88%
0%100%
Low · +0.13 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 2 · Related 2
OPENSUSE-SU-2024:13427-1USN-6476-1

Timeline

  1. 27-10-2023
    PublishedVulnerability first disclosed.
  2. 09-09-2024
    Last modifiedVulnerability information updated.

Description

In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

Increase +0.13 pp

From 0.76% 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
  • memcached< 1.6.18-1+deb12u1 | < 1.6.22-1
Memcached1 product
Ubuntu1 product
  • memcached< 1.6.14-1ubuntu0.1

3 vendors · 3 products

References

7 links