What’s Vulnerable › Vulnerabilities

CVE-2017-7482

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-30 · updated 2026-06-17
• Weakness: CWE-190

Description

In the Linux kernel before version 4.12, Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.

Affected products

• Debian Linux: 8.0, 9.0
• Linux kernel: before 3.2.90; from 3.3 before 3.10.108; from 3.11 before 3.16.45; from 3.17 before 3.18.59; from 3.19 before 4.1.43; from 4.2 before 4.4.75 — fixed in 3.10.108, 3.16.45, 3.18.59, 3.2.90, 4.1.43, 4.11.8
• RedHat Enterprise Mrg: 2.0

How to fix

Upgrade to a fixed version: Linux kernel 3.10.108, 3.16.45, 3.18.59, 3.2.90. Check the vendor advisory for mitigations.

References

• http://seclists.org/oss-sec/2017/q2/602
• http://www.securityfocus.com/bid/99299
• http://www.securitytracker.com/id/1038787
• https://access.redhat.com/errata/RHSA-2019:0641
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7482
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f2f97656ada8d811d3c1bef503ced266fcd53a0
• https://www.debian.org/security/2017/dsa-3927
• https://www.debian.org/security/2017/dsa-3945
• http://seclists.org/oss-sec/2017/q2/602
• http://www.securityfocus.com/bid/99299
• http://www.securitytracker.com/id/1038787
• https://access.redhat.com/errata/RHSA-2019:0641

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