Loading vulnerability…
CVE-2023-53240 is a NULL-pointer dereference in the Linux kernel AF_XDP (xsk) transmit path. Before the fix, the sendmsg() path could mark a NAPI ID before validating that the network device bound to the AF_XDP socket had the IFF_UP flag set. Although the shared xsk_xmit() routine subsequently checked IFF_UP and returned an error for a down interface, that validation occurred after the unsafe NAPI-ID handling. Transmission through sendmsg() on a bound but down interface could therefore dereference a NULL pointer in xsk_sendmsg(). The fix moves applicable sanity checks into the sendmsg() and poll() paths before NAPI-ID handling, while limiting xsk_xmit() to generic transmit processing and RCU handling.
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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel AF_XDP (xsk) transmit-path NULL-pointer dereference caused by checking whether the network interface is up too late in the sendmsg() path. The fix moves/populates sanity checks earlier in the relevant transmit paths.
A Linux kernel XSK transmit-path flaw addressed by checking the IFF_UP interface state earlier.
Linux kernel AF_XDP (xsk) transmit-path flaw involving delayed IFF_UP interface-state checking.
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.