CVE-2023-53110net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler() When performing a stress test on SMC-R by rmmod mlx5_ib driver during the wrk/nginx test, we found that there is a probability of triggering a panic while terminating all link groups. This issue dues to the race between smc_smcr_terminate_all() and smc_buf_create(). smc_smcr_terminate_all smc_buf_create /* init */ conn->sndbuf_desc = NULL; ... __smc_lgr_terminate smc_conn_kill smc_close_abort smc_cdc_get_slot_and_msg_send __softirqentry_text_start smc_wr_tx_process_cqe smc_cdc_tx_handler READ(conn->sndbuf_desc->len); /* panic dues to NULL sndbuf_desc */ conn->sndbuf_desc = xxx; This patch tries to fix the issue by always to check the sndbuf_desc before send any cdc msg, to make sure that no null pointer is seen during cqe processing.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0b29ec6436138721acf5844e558f7334a0fa61d5 before 31817c530768b0199771ec6019571b4f0ddbf230; from 0b29ec6436138721acf5844e558f7334a0fa61d5 before b108bd9e6be000492ebebe867daa699285978a10; from 0b29ec6436138721acf5844e558f7334a0fa61d5 before 3c270435db8aa34929263dddae8fd050f5216ecb; from 0b29ec6436138721acf5844e558f7334a0fa61d5 before 3ebac7cf0a184a8102821a7a00203f02bebda83c; from 0b29ec6436138721acf5844e558f7334a0fa61d5 before 22a825c541d775c1dbe7b2402786025acad6727b | CNA record |
linux linux_kernel linux:linux_kernel | from 5.5 before 5.10.176; from 5.11 before 5.15.104; from 5.16 before 6.1.21; from 6.2 before 6.2.8; 6.3; 6.3 | NVD |
References
- https://git.kernel.org/stable/c/31817c530768b0199771ec6019571b4f0ddbf230patch
- https://git.kernel.org/stable/c/b108bd9e6be000492ebebe867daa699285978a10patch
- https://git.kernel.org/stable/c/3c270435db8aa34929263dddae8fd050f5216ecbpatch
- https://git.kernel.org/stable/c/3ebac7cf0a184a8102821a7a00203f02bebda83cpatch
- https://git.kernel.org/stable/c/22a825c541d775c1dbe7b2402786025acad6727bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.