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CVE-2022-50356 is a null-pointer dereference in the Linux kernel Stochastic Fair Blue (SFB) network queuing discipline cleanup path. When SFB is configured as the default qdisc and qdisc initialization fails during mqprio_init(), including when tcf_block_get() fails in sfb_init(), q->qdisc can remain NULL. Subsequent cleanup invokes sfb_reset(), which calls qdisc_reset(q->qdisc) and dereferences the NULL pointer, causing a general-protection fault.
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What an attacker gets, and what they’ve been doing with it.
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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.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability included in the CentOS 7 TuxCare security advisory/plugin.
A null-pointer access flaw in Linux kernel SFB network-scheduler initialization failure handling.
Linux kernel network scheduler SFB null-pointer-access flaw when sfb_init() fails.
A Linux kernel network scheduler SFB flaw that can cause null-pointer access when sfb_init() fails.
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.