7.1

CVE-2023-2861: Qemu: 9pfs: improper access control on special files

Modified
AliasesUBUNTU-CVE-2023-2861DEBIAN-CVE-2023-2861ALPINE-CVE-2023-2861
Published 06-12-2023Last modified 02-08-2024

Vulnerability summary

CVE-2023-2861 is a high (CVSS 7.1) Improper Access Control vulnerability in qemu. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 31.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.38%
0%100%
Low · 0.00 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 11 · Related 11
DLA-3759-1MGASA-2024-0047OPENSUSE-SU-2024:13058-1SUSE-SU-2023:3015-1SUSE-SU-2023:3082-1SUSE-SU-2023:3082-2

Timeline

  1. 06-12-2023
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.38% 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: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu2 products
  • kvmtool< 0.20151104-1ubuntu0.1~esm1 | < 0.20170904-1ubuntu0.18.04.1~esm1 | < 0.20170904-1ubuntu0.20.04.1~esm1 | < 0.20170904-1.1ubuntu0.1~esm2
  • qemu< 2.0.0+dfsg-2ubuntu1.47+esm6 | < 1:2.5+dfsg-5ubuntu10.51+esm4 | < 1:2.11+dfsg-1ubuntu7.42+esm5 | < 1:4.2-3ubuntu6.28 | < 1:6.2+dfsg-2ubuntu6.16
Alpine1 product
  • qemu< 8.0.2-r1
Debian1 product
  • qemu< 1:7.2+dfsg-7+deb12u1 | < 1:8.0.3+dfsg-1
Qemu1 product

4 vendors · 5 products

References

13 links
Show all 13 references