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CVE-2023-28772 is a buffer-overflow write vulnerability in the Linux kernel seq_buf implementation. The flaw is in seq_buf_putmem_hex() in lib/seq_buf.c, reachable through the trace_seq_putmem_hex() call flow used by debugging functionality such as ftrace. A missing destination-buffer sanity check permits data written as hexadecimal output to exceed the available destination buffer. Linux kernel versions before 5.13.3 are affected; the upstream correction is associated with commit d3b16034a24a112bb83aeb669ac5b9b01f744bb7 and was incorporated by Linux 5.14-rc1.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel seq_buf_putmem_hex buffer overflow in lib/seq_buf.c.
Linux kernel buffer overflow in seq_buf_putmem_hex.
Linux kernel buffer overflow in lib/seq_buf.c seq_buf_putmem_hex().
Linux kernel buffer-overflow vulnerability in seq_buf_putmem_hex().
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.