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CVE-2019-11477

Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs

High7.5EPSS 98.7%
Published
Updated
Reserved
Assigned by
canonical

Description

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

Scores

CVSS scores of CVE-2019-11477, by who scored it
Scored byCVSSScoreVector
canonicalCNA (assigner)3.0High7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
98.7% · top 0.1% of all CVEs (6 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Linux · Linux kernel

    • affected 4.4 – < 4.4.182
    • affected 4.9 – < 4.9.182
    • affected 4.14 – < 4.14.127
    • affected 4.19 – < 4.19.52
    • affected 5.1 – < 5.1.11

References (29)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .