High [CVE-2026-53233] fix double-free in netdev_nl_bind_rx_doit
This high-severity Red Hat Linux advisory covers CVE-2026-53233 affecting Red Hat Enterprise Linux 10, Red Hat package: kernel.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
In the Linux kernel, the following vulnerability has been resolved: netdev: fix double-free in netdev_nl_bind_rx_doit() Sashiko flags that genlmsg_reply() always consumes the skb. The error path calls nlmsg_free(rsp) so we can't jump directly to it.
Let's not unbind, just propagate the error to the user. This is the typical way of handling genlmsg_reply() failures.
They shouldn't happen unless user does something silly like calling the kernel with an already-full rcvbuf. A double-free vulnerability exists within the `netdev_nl_bind_rx_doit()` function, which is responsible for binding network device receive operations.
This vulnerability arises when `genlmsg_reply()` consumes the socket buffer (`skb`), and the error handling path subsequently attempts to free the response (`rsp`) again, resulting in a double-free. This could allow a local attacker to cause a denial of service (DoS) or potentially execute arbitrary code.
Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-763.
Affected Red Hat products: Red Hat Enterprise Linux 10. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel.
Is CVE-2026-53233 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53233 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-53233?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
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