Use After Free The advisory has been revoked - it doesn't affect any version of package libperf (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS10-LIBPERF-19211333
- published23 Aug 2026
- disclosed15 Aug 2026
Introduced: 15 Aug 2026
CVE-2026-74533 (opens in a new tab)Amendment
The Centos security team deemed this advisory irrelevant for Centos:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by Centos.
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero
hci_conn::iso_data is accessed and modified without lock or RCU. This leads to a race
[Task hdev->workqueue] [Task 2]
iso_recv iso_conn_put(conn)
conn = LOAD hcon->iso_data iso_conn_free(conn)
iso_conn_hold_unless_zero(conn) hcon->iso_data = NULL
kfree(conn)
kref_get_unless_zero(&conn->ref) /* UAF */
and also to races in iso_conn_add() vs. iso_conn_free().
Fix by adding spinlock hci_conn::proto_lock and using it to guard hci_conn::iso_data.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2516978
- https://access.redhat.com/security/cve/CVE-2026-74533
- https://git.kernel.org/stable/c/876a3e94c70d0859d1dad1c986112d4f0d99eba8
- https://git.kernel.org/stable/c/af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c
- https://git.kernel.org/stable/c/08ac98f18c8d24cc037858dd6fba2670155e4e84