CVE-2026-46155
Linux kernel SMB client: out-of-bounds read leaks kernel memory.
Is CVE-2026-46155 being exploited?
Not confirmed. CVE-2026-46155 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 0.48% probability of exploitation in the next 30 days.
How severe is CVE-2026-46155?
CVE-2026-46155 is rated Critical with a CVSS score of 9.1. 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-2026-46155?
Yes. A fix has been recorded for CVE-2026-46155. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-46155 affect?
CVE-2026-46155 affects Linux kernel smb client (smb2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-46155?
Update kernel to patched version with SMB fix.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Info disclosure: crafted SMB response leaks kernel heap memory; could enable further exploits.
Patch when possible
- affected>= 7449d736bbbd160c76b01b8fcdf72f58a8757d4b and < dffb44b2e06a2908e249f0f93156fc987eee1d1c
- affected>= ea41367b2a602f602ea6594fc4a310520dcc64f4 and < 9b3af35645ff9cd334edc130249f9a2fb2bea25f
- affected>= ea41367b2a602f602ea6594fc4a310520dcc64f4 and < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926
- affected>= ea41367b2a602f602ea6594fc4a310520dcc64f4 and < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
- affected>= ea41367b2a602f602ea6594fc4a310520dcc64f4 and < 8d09328dfda089675e4c049f3f256064a1d1996b
- affected>= 6.6.32 and < 6.6.140
- affected6.9
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.