ghsa-g3v4-29h4-3gxq
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
r5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is empty, and then submit 'flush_bio', however, r5l_log_flush_endio() is clearing the list first and then clear the bio, which will cause null-ptr-deref:
T1: submit flush io raid5d handle_active_stripes r5l_flush_stripe_to_raid // list is empty // add 'io_end_ios' to the list bio_init submit_bio // io1
T2: io1 is done r5l_log_flush_endio list_splice_tail_init // clear the list T3: submit new flush io ... r5l_flush_stripe_to_raid // list is empty // add 'io_end_ios' to the list bio_init bio_uninit // clear bio->bi_blkg submit_bio // null-ptr-deref
Fix this problem by clearing bio before clearing the list in r5l_log_flush_endio().
{
"affected": [],
"aliases": [
"CVE-2023-53210"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:47Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()\n\nr5l_flush_stripe_to_raid() will check if the list \u0027flushing_ios\u0027 is\nempty, and then submit \u0027flush_bio\u0027, however, r5l_log_flush_endio()\nis clearing the list first and then clear the bio, which will cause\nnull-ptr-deref:\n\nT1: submit flush io\nraid5d\n handle_active_stripes\n r5l_flush_stripe_to_raid\n // list is empty\n // add \u0027io_end_ios\u0027 to the list\n bio_init\n submit_bio\n // io1\n\nT2: io1 is done\nr5l_log_flush_endio\n list_splice_tail_init\n // clear the list\n\t\t\tT3: submit new flush io\n\t\t\t...\n\t\t\tr5l_flush_stripe_to_raid\n\t\t\t // list is empty\n\t\t\t // add \u0027io_end_ios\u0027 to the list\n\t\t\t bio_init\n bio_uninit\n // clear bio-\u003ebi_blkg\n\t\t\t submit_bio\n\t\t\t // null-ptr-deref\n\nFix this problem by clearing bio before clearing the list in\nr5l_log_flush_endio().",
"id": "GHSA-g3v4-29h4-3gxq",
"modified": "2025-09-15T15:31:28Z",
"published": "2025-09-15T15:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53210"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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