ghsa-gpg5-528w-fhh8
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns()
When getting the IRQ we use k3_udma_glue_tx_get_irq() which returns negative error value on error. So not NULL check is not sufficient to deteremine if IRQ is valid. Check that IRQ is greater then zero to ensure it is valid.
There is no issue at probe time but at runtime user can invoke .set_channels which results in the following call chain. am65_cpsw_set_channels() am65_cpsw_nuss_update_tx_rx_chns() am65_cpsw_nuss_remove_tx_chns() am65_cpsw_nuss_init_tx_chns()
At this point if am65_cpsw_nuss_init_tx_chns() fails due to k3_udma_glue_tx_get_irq() then tx_chn->irq will be set to a negative value.
Then, at subsequent .set_channels with higher channel count we will attempt to free an invalid IRQ in am65_cpsw_nuss_remove_tx_chns() leading to a kernel warning.
The issue is present in the original commit that introduced this driver, although there, am65_cpsw_nuss_update_tx_rx_chns() existed as am65_cpsw_nuss_update_tx_chns().
{
"affected": [],
"aliases": [
"CVE-2025-21799"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-27T20:16:02Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns()\n\nWhen getting the IRQ we use k3_udma_glue_tx_get_irq() which returns\nnegative error value on error. So not NULL check is not sufficient\nto deteremine if IRQ is valid. Check that IRQ is greater then zero\nto ensure it is valid.\n\nThere is no issue at probe time but at runtime user can invoke\n.set_channels which results in the following call chain.\nam65_cpsw_set_channels()\n am65_cpsw_nuss_update_tx_rx_chns()\n am65_cpsw_nuss_remove_tx_chns()\n am65_cpsw_nuss_init_tx_chns()\n\nAt this point if am65_cpsw_nuss_init_tx_chns() fails due to\nk3_udma_glue_tx_get_irq() then tx_chn-\u003eirq will be set to a\nnegative value.\n\nThen, at subsequent .set_channels with higher channel count we\nwill attempt to free an invalid IRQ in am65_cpsw_nuss_remove_tx_chns()\nleading to a kernel warning.\n\nThe issue is present in the original commit that introduced this driver,\nalthough there, am65_cpsw_nuss_update_tx_rx_chns() existed as\nam65_cpsw_nuss_update_tx_chns().",
"id": "GHSA-gpg5-528w-fhh8",
"modified": "2025-03-13T15:32:52Z",
"published": "2025-02-27T21:32:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21799"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/321990fdf4f1bb64e818c7140688bf33d129e48d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4395a44acb15850e492dd1de9ec4b6479d96bc80"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8448c87b3af68bebca21e3136913f7f77e363515"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/88fd5db8c0073bd91d18391feb5741aeb0a2b475"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8aae91ae1c65782a169ec070e023d4d269e5d6e6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aea5cca681d268f794fa2385f9ec26a5cce025cd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ed8c0300f302338c36edb06bca99051e5be6fb2f"
}
],
"schema_version": "1.4.0",
"severity": []
}
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