What’s Vulnerable › Vulnerabilities

CVE-2023-42752: Kernel: integer overflow in igmpv3_newpack leading to exploitable memory access

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-13 · updated 2026-06-17
• Weakness: CWE-190

Description

An integer overflow flaw was found in the Linux kernel. This issue leads to the kernel allocating `skb_shared_info` in the userspace, which is exploitable in systems without SMAP protection since `skb_shared_info` contains references to function pointers.

Affected products

• Linux kernel: through 6.5.7

References

• http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
• https://access.redhat.com/security/cve/CVE-2023-42752
• https://bugzilla.redhat.com/show_bug.cgi?id=2239828
• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=915d975b2ffa
• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c3b704d4a4a2
• http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
• https://access.redhat.com/security/cve/CVE-2023-42752
• https://bugzilla.redhat.com/show_bug.cgi?id=2239828
• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=915d975b2ffa
• https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c3b704d4a4a2

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