CVE-2026-53216
net: mvpp2: limit XDP frame size to the RX buffer
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: limit XDP frame size to the RX buffer mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with PAGE_SIZE as frame size. XDP helpers use frame_sz to validate tail growth and to derive the hard end of the data area. Advertising PAGE_SIZE for short buffers can let bpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting memory or later tripping skb tailroom checks. Initialize the XDP buffer with bm_pool->frag_size so XDP tailroom matches the actual buffer backing the packet.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.9
References 7
git.kernel.org
- stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1
- stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339
- stable/c/3b8b0c3631b19faee53f0d15a49924129b063eec
- stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749
- stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3e
- stable/c/9545cc5ef18ca22d031f2f47c157192460652359
- stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305a