CVE-2026-64548High· 8.4▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data() When the scatterlist ring is full or nearly full, bpf_msg_push_data() enters a copy fallback path an…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 46.2 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.1%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
When the scatterlist ring is full or nearly full, bpf_msg_push_data() enters a copy fallback path and computes copy + len for the page allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING and both are u32, a crafted len can wrap the sum to a small value, causing an undersized allocation followed by an out-of-bounds memcpy.
BUG: unable to handle page fault for address: ffffed104089a402 Oops: Oops: 0000 [#1] SMP KASAN NOPTI Call Trace: __asan_memcpy (mm/kasan/shadow.c:105) bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788) bpf_prog_9ed8b5711920a7d7+0x2e/0x36 sk_psock_msg_verdict (net/core/skmsg.c:934) tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584) __sys_sendto (net/socket.c:2206) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
Add an overflow check before the allocation.
Linux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5Linux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < a12b1575f9feabd91695a9e9d004862f7195fa25Linux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < ff39d0e3b4feeb65ca43c453d7c75fdf872ded0dLinux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 888706a76286c547bd035432602571e8024b5305Linux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < db77b6bb6e6edb79b10b4efcce346eec5582d588Linux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 4e40056bb5c829f0423f0a6694a0477726d2147eLinux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < bd004716ba75fed6d185795c85cdc92540ebeaabLinux >= 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 < 0c0a8ed85349dae298712d79cb276acfeb794d82Linux 4.20Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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