SB20260928432 - Red Hat Enterprise Linux 9 update for kpatch-patch-5_14_0-687_10_1
Published: September 28, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Double free (CVE-ID: CVE-2026-45852)
CWE-ID: CWE-415 - Double Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to double free in rxe_srq_from_init in the RDMA rxe subsystem when handling a failed copy_to_user operation during SRQ creation. A local user can trigger an error path to cause a denial of service.
2) Out-of-bounds write (CVE-ID: CVE-2026-46145)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to overwrite kernel memory.
The vulnerability exists due to an out-of-bounds write in the RDMA/mana rx hash key handling when processing a user-supplied uAPI structure. A local user can supply a crafted rx_hash_key_len value to overwrite kernel memory.
3) Double free (CVE-ID: CVE-2026-46189)
CWE-ID: CWE-415 - Double Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to double free in pvrdma_alloc_ucontext() error path when handling ucontext allocation failures. A local user can trigger the error path to cause a denial of service.
4) Use-after-free (CVE-ID: CVE-2026-74581)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in fib6_rule_lookup() and fib6_rule_suppress() in the IPv6 routing rules handler when processing suppressed IPv6 route lookups. A local user can trigger route lookups involving a suppressing rule to cause a denial of service.
The issue occurs because a stale dst entry can be returned after the released route remains referenced in the lookup result.
Remediation
Install update from vendor's website.