CVE-2026-72042ipmi: Fix user refcount underflow in event delivery
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ipmi: Fix user refcount underflow in event delivery ipmi_alloc_recv_msg(user) takes the temporary user reference owned by the receive message, and ipmi_free_recv_msg() drops it again. If event delivery fails after allocating receive messages for earlier users, handle_read_event_rsp() rolls those messages back with ipmi_free_recv_msg(). That rollback path still drops user->refcount explicitly after freeing each message. The extra put can free a user that remains linked on intf->users, so later event delivery may dereference a freed user or trip refcount_t's addition-on-zero warning when ipmi_alloc_recv_msg() tries to acquire another reference. Remove the stale explicit put and the now-dead user assignment. Keep the list_del() and ipmi_free_recv_msg() calls; they are the required rollback operations.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 – < ddbb6e3dc9bb4743de686aa1598c31e745cee76b
- affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 – < 7be349d4fcc5e065295b83418a22d27a68afbdb6
- affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 – < 6aa9e61c46465d231e9beddf56af7effd71be682
- affected f63723ca7d7623f9dae1990973cd158671f03c56
- affected 348121b29594d42d1635648fd3ed31dfa25351d5
- affected 53d6e403affbf6df2c859a0ea00ccfc1e72090ca
- affected 0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5
- affected 6.1.157 – < 6.2
- affected 6.6.113 – < 6.7
- affected 6.12.54 – < 6.13
- affected 6.17.4 – < 6.18
- affected 6.18
- unaffected < 6.18
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59000 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72042)Record last updated .