GHSA-4X5Q-83G5-68JV
Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-18 18:31In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix UAF on lgr list traversal in smcr_port_err()
smcr_port_err() traverses smc_lgr_list.list without holding smc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched() to free an lgr while it is still being dereferenced.
Hold smc_lgr_list.lock across the traversal. Update smc_ib_gid_check() to call smcr_port_err() after releasing the lock.
{
"affected": [],
"aliases": [
"CVE-2026-98559"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:08Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix UAF on lgr list traversal in smcr_port_err()\n\nsmcr_port_err() traverses smc_lgr_list.list without holding\nsmc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched()\nto free an lgr while it is still being dereferenced.\n\nHold smc_lgr_list.lock across the traversal. Update\nsmc_ib_gid_check() to call smcr_port_err() after releasing the lock.",
"id": "GHSA-4x5q-83g5-68jv",
"modified": "2026-10-18T18:31:54Z",
"published": "2026-10-18T18:31:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98559"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/00a59600ae72d24859d0ad1783a78bc921bc2599"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0edcc4284392b28826b5d37532b366b291e6e0fa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/34bcf11cd2528ae00bb6d764d808083c66824277"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d35f069e1c119992000d51236dbe54da2d4e61e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d65a2eb4449fc9658fb860dea893025d028d90e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61cb282fe97b3b0ba32ca09417a693162bf4ae3f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a9b968e42690d784c241a0761c10253271f7df5d"
}
],
"schema_version": "1.4.0",
"severity": []
}
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