CVE-2026-74669
ipvs: clear IPv4 options after rebasing tunnel ICMP errors
Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: clear IPv4 options after rebasing tunnel ICMP errors ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the quoted original request before passing it to icmp_send(). However, IPCB(skb)->opt still describes the outer IPv4 header. A timestamp option in the outer header can therefore leave an offset that points into the quoted transport header after the rebase. __ip_options_echo() treats a byte at that stale location as the option length and copies it into the fixed-size option storage on the __icmp_send() stack, causing a stack out-of-bounds write. Clear the stale option metadata after resetting the network header. Keep the remaining control block fields, including the ingress interface used by the ICMP response path.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 22, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74669
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Clear IPv4 options after rebasing tunnel ICMP errors.
- Reset network header metadata.
- Apply available vendor patches.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74669.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74669 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74669
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74669 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74669 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': '79ffa99202c944467e28b13b513bf2998732edff', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': 'c9413b50204738fbc429bb86bf01353c393a6c28', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': '37c61b3745129cbd682c557b51345828120972e5', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': 'ed246dd85ebf27c1f6b7897834d40786c0ca3006', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': '6f46fc460e9316062bdcdf89199eb5d7a33da33b', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': '75eec935444db4af2123e0491936f6e273d7ea00', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': '384b4dae14277d369221d187e9b3af56c79d2e50', 'versionType': 'git'}, {'status': 'affected', 'version': 'f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e', 'lessThan': 'e0ba936287dfe9783426aac27e5fd76fe35b38c9', 'versionType': 'git'}], 'programFiles': ['net/netfilter/ipvs/ip_vs_core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.265', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.216', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.152', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.104', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.45', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/netfilter/ipvs/ip_vs_core.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ipvs: clear IPv4 options after rebasing tunnel ICMP errors ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the quoted original request before passing it to icmp_send(). However, IPCB(skb)->opt still describes the outer IPv4 header. A timestamp option in the outer header can therefore leave an offset that points into the quoted transport header after the rebase. __ip_options_echo() treats a byte at that stale location as the option length and copies it into the fixed-size option storage on the __icmp_send() stack, causing a stack out-of-bounds write. Clear the stale option metadata after resetting the network header. Keep the remaining control block fields, including the ingress interface used by the ICMP response path. Added Reference https://git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5 Added Reference https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50 Added Reference https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b Added Reference https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00 Added Reference https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff Added Reference https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28 Added Reference https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9 Added Reference https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006