CVE-2017-7477

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-04-25 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Linux kernel: from 4.6 before 4.9.28; from 4.10 before 4.10.16 — fixed in 4.10.16, 4.9.28

How to fix

Upgrade to a fixed version: Linux kernel 4.10.16, 4.9.28. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/98014
http://www.securitytracker.com/id/1038500
https://access.redhat.com/errata/RHSA-2017:1615
https://access.redhat.com/errata/RHSA-2017:1616
https://bugzilla.redhat.com/show_bug.cgi?id=1445207
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=4d6fa57b4dab0d77f4d8e9d9c73d1e63f6fe8fee
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5294b83086cc1c35b4efeca03644cf9d12282e5b
http://www.securityfocus.com/bid/98014
http://www.securitytracker.com/id/1038500
https://access.redhat.com/errata/RHSA-2017:1615
https://access.redhat.com/errata/RHSA-2017:1616
https://bugzilla.redhat.com/show_bug.cgi?id=1445207

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