7.8

CVE-2017-16939: debian debian_linux Use After Free

Modified
AliasesSUSE-SU-2017:3338-1UBUNTU-CVE-2017-16939DEBIAN-CVE-2017-16939
Published 24-11-2017Last modified 05-08-2024

Vulnerability summary

CVE-2017-16939 is a high (CVSS 7.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 2.15% chance of exploitation in the next 30 days, higher than 82.1% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (exploit-database, 23-11-2017)

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
2.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2reference, exploit-database

Advisory lineage

Upstream 0 · Downstream 105 · Related 92
DLA-1200-1DSA-4082-1MGASA-2017-0463MGASA-2017-0466MGASA-2017-0467MGASA-2018-0062

Showing 100 of 105.

Timeline

  1. 24-11-2017
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

2.15%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.15% 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

2 found
  • referenceUnverified

    Exploit Reference (blogs.securiteam.com)

    Maturity: unknown

  • exploit-databaselocallinuxUnverified

    Linux Kernel (Ubuntu 17.04) - 'XFRM' Local Privilege Escalation

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu18 products
  • linux< 3.13.0-137.186 | < 4.4.0-103.126
  • linux-aws< 4.4.0-1005.5 | < 4.4.0-1043.52
  • linux-azure< 4.11.0-1016.16
  • linux-azure-fdeAll versions (No fix recorded)
  • linux-euclid< 4.4.0-9020.21
Debian2 products
Suse2 products
  • kgraft-patch-SLE12-SP1_Update_22&distro=SUSE Linux Enterprise Server 12 SP1-LTSS< 2-2.1
  • kgraft-patch-SLE12-SP1_Update_22&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP1< 2-2.1
Linux1 product
  • linux_kernel≥ 2.6.28, < 3.2.97 | ≥ 3.3, < 3.16.52 | ≥ 3.17, < 3.18.86 | ≥ 3.19, < 4.1.48 | ≥ 4.2, < 4.4.104 | ≥ 4.5, < 4.9.60 | ≥ 4.10, < 4.13.11

4 vendors · 23 products

References

29 links
Show all 29 references