Linux · Security advisory · July 25, 2026
RHSA-2026:77634: kernel security update
RHSA-2026:77634, released July 25, 2026, fixes 7 CVEs in kernel (version 6.12.0-55.109.1.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
7
1 rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0066
51st percentile
Priority of the 7 CVEs
Patch now 0
Urgent 1
High 6
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| kernel | RHEL 10 | 6.12.0-55.109.1.el10_0 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-43186 | linux: In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fix heap buffer overflow in __ioam6_... | 9.8 | 0.0064 | None reported | |
| High | CVE-2026-52924 | sctp: purge outqueue on stale COOKIE-ECHO handling | 9.8 | 0.0066 | None reported | |
| High | CVE-2026-64007 | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 9.8 | 0.0051 | None reported | |
| High | CVE-2026-64383 | smb: client: fix double-free in SMB2_flush() replay | 9.8 | 0.0046 | None reported | |
| High | CVE-2026-64386 | smb: client: fix query_info() replay double-free | 9.8 | 0.0046 | None reported | |
| High | CVE-2025-40237 | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 7.1 | 0.0022 | None reported | |
| High | CVE-2026-45991 | udf: fix partition descriptor append bookkeeping | 7.8 | 0.0018 | None reported |
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