CVE-2026-53355
Linux Kernel NULL pointer dereference
- Published1 Jul 2026
Description
In the Linux kernel, the following vulnerability has been resolved: net: rds: clear i_sends on setup unwind The RDS IB connection teardown path is written so it can run during partial startup and on repeated shutdown attempts. It uses NULL pointers to distinguish resources that are still owned from resources that have already been released. When rds_ib_setup_qp() fails after allocating i_sends but before allocating i_recvs, the sends_out path frees i_sends without clearing the pointer. A later shutdown pass can still treat that stale pointer as a live send ring allocation. Clear i_sends after vfree() in the error unwind path so the existing shutdown logic continues to use the correct ownership state.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/1d4ec754ee3871f7e3670c67bb0298c9c5760926
- https://git.kernel.org/stable/c/20cf0fb715c41111469577e85e35d15f099473e0
- https://git.kernel.org/stable/c/27040bbca289a704eafcacca167d310c6ce2b1bc
- https://git.kernel.org/stable/c/29d940026dce39e3018dab6f67c9427249321270
- https://git.kernel.org/stable/c/2c5e5e4a5970c41f16e3ad801a78719ed5d5c71b
- https://git.kernel.org/stable/c/66cccec111421a10efdc2c74499d15b93e7acae5
References
- https://git.kernel.org/stable/c/1d4ec754ee3871f7e3670c67bb0298c9c5760926
- https://git.kernel.org/stable/c/20cf0fb715c41111469577e85e35d15f099473e0
- https://git.kernel.org/stable/c/27040bbca289a704eafcacca167d310c6ce2b1bc
- https://git.kernel.org/stable/c/29d940026dce39e3018dab6f67c9427249321270
- https://git.kernel.org/stable/c/2c5e5e4a5970c41f16e3ad801a78719ed5d5c71b
- https://git.kernel.org/stable/c/66cccec111421a10efdc2c74499d15b93e7acae5
- https://git.kernel.org/stable/c/e7cf30aa5f1fc6c2a86df65df8b731df20e44d79
- https://git.kernel.org/stable/c/f16ad421a4e3e7db2d14bdf3b16f583bc4f3b30a
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-53355 being actively exploited?
CVE-2026-53355 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.42%.
How severe is CVE-2026-53355?
CVE-2026-53355 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.42% probability of exploitation.
Which products are affected by CVE-2026-53355?
Affected products include Linux Kernel.
How do I fix CVE-2026-53355?
Upgrade affected software to a fixed version, for example Linux Kernel 3.19 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-53355 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.