Loading vulnerability…
CVE-2024-26665 is an out-of-bounds read in Linux kernel tunnel handling while constructing an ICMPv6 Path MTU (PMTU) error. In iptunnel_pmtud_build_icmpv6(), the kernel used csum_partial() to calculate a checksum over packet data. That function does not safely process non-linear socket buffers (SKBs), allowing checksum processing to read beyond the relevant slab allocation. The issue was introduced in Linux 5.9. The fix replaces csum_partial() with skb_checksum(), which correctly handles non-linear SKBs.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel tunnel IPv6 PMTU error-processing out-of-bounds access flaw.
Out-of-bounds access in Linux kernel tunnel handling while building IPv6 PMTU errors.
An out-of-bounds access vulnerability in the Linux kernel tunnel code while constructing IPv6 Path MTU (PMTU) ICMPv6 error packets. The fix replaces a direct partial checksum calculation with skb_checksum(), accounting for the packet buffer layout.
An out-of-bounds read vulnerability (CWE-125) in the Linux kernel's handling of non-linear socket buffers during ICMPv6 PMTU error checksum calculation. It can expose memory contents and cause denial of service through crashes; Red Hat rates its affected-product configuration Moderate, CVSS 7.1.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.