CVE-2026-31705
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
W jądrze Linuksa naprawiono podatność, która pozwalała na zapis poza granicami bufora w funkcji smb2_get_ea(). Problem występował z powodu braku sprawdzenia długości bufora przed zastosowaniem wyrównania pamięci, co mogło prowadzić do nadpisania sąsiedniej pamięci jądra.
Risk Assessment
Podatność ta może prowadzić do nieautoryzowanego dostępu do pamięci jądra, co stwarza ryzyko destabilizacji systemu oraz potencjalnych ataków na integralność danych.
Recommendation
Zaleca się aktualizację jądra Linuksa do najnowszej wersji, w której wprowadzono poprawki eliminujące tę podatność oraz wdrożenie dodatkowych środków zabezpieczających w celu monitorowania i ochrony pamięci jądra.
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- CVE-2026-123961Critical
A vulnerability was detected in TOTOLINK CA300-PoE version 6.2c.884 affecting the setWiFiBasicConfig function in /cgi-bin/cstecgi.cgi. Manipulation of the KeyStr argument leads to a buffer overflow. The attack can be initiated remotely and a public exploit is available.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment smb2_get_ea() applies 4-byte alignment padding via memset() after writing each EA entry. The bounds check on buf_free_len is performed before the value memcpy, but the alignment memset fires unconditionally afterward with no check on remaining space. When the EA value exactly fills the remaining buffer (buf_free_len == 0 after value subtraction), the alignment memset writes 1-3 NUL bytes past the buf_free_len boundary. In compound requests where the response buffer is shared across commands, the first command (e.g., READ) can consume most of the buffer, leaving a tight remainder for the QUERY_INFO EA response. The alignment memset then overwrites past the physical kvmalloc allocation into adjacent kernel heap memory. Add a bounds check before the alignment memset to ensure buf_free_len can accommodate the padding bytes. This is the same bug pattern fixed by commit beef2634f81f ("ksmbd: fix potencial OOB in get_file_all_info() for compound requests") and commit fda9522ed6af ("ksmbd: fix OOB write in QUERY_INFO for compound requests"), both of which added bounds checks before unconditional writes in QUERY_INFO response handlers.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS