CVE-2019-11477
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 5.1.11.a-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.19.37-4 |
| sid | Fixed | 4.19.37-4 |
| forky | Fixed | 4.19.37-4 |
| bullseye | Fixed | 4.19.37-4 |
| bookworm | Fixed | 4.19.37-4 |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
References
- https://security.archlinux.org/ASA-201906-12
- https://security.archlinux.org/ASA-201906-15
- https://security.archlinux.org/ASA-201906-14
- https://security.archlinux.org/ASA-201906-13
- https://www.suse.com/security/cve/CVE-2019-11477.html
- https://security-tracker.debian.org/tracker/CVE-2019-11477
- https://access.redhat.com/errata/RHSA-2019:1479
- https://access.redhat.com/errata/RHSA-2019:1480
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.