Answer in brief
CVE-2026-89486 records a High severity (CVSS 7.8) vulnerability in ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9e91f8a6c8688e27f4ccce7db457da87d6458836 <3088e41292fecf132f85f79af5ee4d620b9ff1b4 || >=9e91f8a6c8688e27f4ccce7db457da87d6458836 <5dc0b2a9af95a97861c1bffaf1687a3173e395c5 || >=9e91f8a6c8688e27f4ccce7db457da87d6458836 <05ec76cfbce653e07cec19b9b8b20e33449d5d87 | 3088e41292fecf132f85f79af5ee4d620b9ff1b4, 5dc0b2a9af95a97861c1bffaf1687a3173e395c5, 05ec76cfbce653e07cec19b9b8b20e33449d5d87 |
| Linux/Linuxgeneric | 6.16 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user() Commit 9e91f8a6c868 ("ipmi:msghandler: Remove srcu for the ipmi_interfaces list") dropped the synchronize_rcu() between unlinking the command receivers from intf->cmd_rcvrs and freeing them, updating only the comment that explains why the barrier is needed. The cmd_rcvrs list is still traversed under plain RCU: find_cmd_rcvr() walks it inside rcu_read_lock(), and handle_ipmb_get_msg_cmd() borrows rcvr->user from that lookup within the same read-side section. Without the grace period, _ipmi_destroy_user() can kfree() a cmd_rcvr while a reader still holds a pointer to it, causing a use-after-free. The rework only made srcu unnecessary for the interfaces list; the cmd_rcvrs list still relies on plain RCU. Restore the synchronize_rcu() before freeing the receivers.
Quoted source text, attributed separately from HOL analysis.