Core OS vulnerability; Linux kernel 32-bit SMB client; widespread use across industries; could enable local privilege escalation.
CVE-2026-46195
Linux kernel SMB client DACL offset wrap leads to bad pointer deref on 32-bit.
Is CVE-2026-46195 being exploited?
Not confirmed. CVE-2026-46195 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.68% probability of exploitation in the next 30 days.
How severe is CVE-2026-46195?
CVE-2026-46195 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-46195?
Yes. A fix has been recorded for CVE-2026-46195. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-46195 affect?
CVE-2026-46195 affects Linux kernel (32-bit builds), 32-bit Linux distributions with SMB client. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-46195?
Update to patched kernel; reboot if required
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local privilege escalation via crafted SMB response causing DACL pointer wrap and kernel memory deref.
Patch when possible
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < 5de2665e913a10ad70aaeecf736b97276e83d995
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < f9dc3be8f403c1216df73e57221f44b045e7ee0b
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < ba7f71b6161c0943dafc367565e5843d16b7d505
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < 3b1ddba19e77ee35241cd27f16dc3e8d14e08db7
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < c688f3ed73d31943334ad2139cb02ec49664322a
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < 8bd07e417b6bda67e317920584e48cb6ee442a8a
- affected>= bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 and < f98b48151cc502ada59d9778f0112d21f2586ca3
- affected5.12
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.