CVE-2007-5501

7.8 HIGH 4% exploit odds Fix listed

What it is

The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.21 through 2.6.23.7, and 2.6.24-rc through 2.6.24-rc2, allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 3.8% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2007-11-15 20:46 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:46 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.8% in the next 30 days (EPSS).
Severity: 7.8 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2007-11-15 20:46 UTC
Last modified: 2026-06-16 22:46 UTC
Exploit probability: 3.8% · EPSS, next 30 days
Weakness: CWE-399
Record status: Modified

Affected

Linux Kernel 2.6.21
Linux Kernel 2.6.21.1
Linux Kernel 2.6.21.2
Linux Kernel 2.6.21.3
Linux Kernel 2.6.21.4
Linux Kernel 2.6.21.5
Linux Kernel 2.6.21.6
Linux Kernel 2.6.21.7

Attack profile CVSS 2.0 · 7.8

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2007-5501.md and follow it. Check whether this project is affected by CVE-2007-5501. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record