Linux Kernel up to 7.1.8 ipvs ip_vs_in_icmp stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k1.30

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.8. It has been classified as very critical. Affected by this issue is the function ip_vs_in_icmp of the component ipvs. This manipulation causes stack-based overflow. This vulnerability appears as CVE-2026-74669. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.1.8 and classified as very critical. Affected by this vulnerability is the function ip_vs_in_icmp of the component ipvs. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-74669 since 08/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/22/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch 79ffa99202c944467e28b13b513bf2998732edff/c9413b50204738fbc429bb86bf01353c393a6c28/37c61b3745129cbd682c557b51345828120972e5/ed246dd85ebf27c1f6b7897834d40786c0ca3006/6f46fc460e9316062bdcdf89199eb5d7a33da33b/75eec935444db4af2123e0491936f6e273d7ea00/384b4dae14277d369221d187e9b3af56c79d2e50/e0ba936287dfe9783426aac27e5fd76fe35b38c9 is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: 79ffa99202c944467e28b13b513bf2998732edff/c9413b50204738fbc429bb86bf01353c393a6c28/37c61b3745129cbd682c557b51345828120972e5/ed246dd85ebf27c1f6b7897834d40786c0ca3006/6f46fc460e9316062bdcdf89199eb5d7a33da33b/75eec935444db4af2123e0491936f6e273d7ea00/384b4dae14277d369221d187e9b3af56c79d2e50/e0ba936287dfe9783426aac27e5fd76fe35b38c9

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/22/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74669 (🔒)
GCVE (CVE): GCVE-0-2026-74669
GCVE (VulDB): GCVE-100-394483

Entryinfo

Created: 08/22/2026 19:00
Changes: 08/22/2026 19:00 (59)
Complete: 🔍
Cache ID: 216::103

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