What is CVE-2017-7477?

CVE-2017-7477 is a high-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.0/10. Published 2017-04-25.

How severe is CVE-2017-7477?

High severity. CVSS v3 base score is 7.0 out of 10.

Is CVE-2017-7477 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Linux Kernel

CVE-2017-7477

Heap-based buffer overflow in drivers/net/macsec.c in the MACsec module in the Linux kernel through 4.10.12 allows attackers to cause a denial of service or possibly have unspecified other impact by leveraging the use of a MAX_SKB_FRAGS+1 size in conjunction with the NETIF_F_FRAGLIST feature, leading to an error in the skb_to_sgvec function.

Vulnerability class: Buffer Overflow

Published 2017-04-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (30.5th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Linux Kernel — versions Linux kernel

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

thdusdl1219/CVE-Study

References

git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/ (Patch)
www.securitytracker.com/id/1038500 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2017:1615 (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2017:1616 (vendor-advisory, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/ (Patch)
www.securityfocus.com/bid/98014 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-7477?: CVE-2017-7477 is a high-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.0/10. Published 2017-04-25.
How severe is CVE-2017-7477?: High severity. CVSS v3 base score is 7.0 out of 10.
Is CVE-2017-7477 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.