ghsa-wmr5-8rgc-r7p9
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
ublk: fix handling recovery & reissue in ublk_abort_queue()
Commit 8284066946e6 ("ublk: grab request reference when the request is handled by userspace") doesn't grab request reference in case of recovery reissue. Then the request can be requeued & re-dispatch & failed when canceling uring command.
If it is one zc request, the request can be freed before io_uring returns the zc buffer back, then cause kernel panic:
[ 126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8 [ 126.773657] #PF: supervisor read access in kernel mode [ 126.774052] #PF: error_code(0x0000) - not-present page [ 126.774455] PGD 0 P4D 0 [ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI [ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full) [ 126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 [ 126.776275] Workqueue: iou_exit io_ring_exit_work [ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv]
Fixes it by always grabbing request reference for aborting the request.
{
"affected": [],
"aliases": [
"CVE-2025-37759"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-01T13:15:54Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: fix handling recovery \u0026 reissue in ublk_abort_queue()\n\nCommit 8284066946e6 (\"ublk: grab request reference when the request is handled\nby userspace\") doesn\u0027t grab request reference in case of recovery reissue.\nThen the request can be requeued \u0026 re-dispatch \u0026 failed when canceling\nuring command.\n\nIf it is one zc request, the request can be freed before io_uring\nreturns the zc buffer back, then cause kernel panic:\n\n[ 126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8\n[ 126.773657] #PF: supervisor read access in kernel mode\n[ 126.774052] #PF: error_code(0x0000) - not-present page\n[ 126.774455] PGD 0 P4D 0\n[ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI\n[ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full)\n[ 126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014\n[ 126.776275] Workqueue: iou_exit io_ring_exit_work\n[ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv]\n\nFixes it by always grabbing request reference for aborting the request.",
"id": "GHSA-wmr5-8rgc-r7p9",
"modified": "2025-05-01T15:31:43Z",
"published": "2025-05-01T15:31:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37759"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067"
}
],
"schema_version": "1.4.0",
"severity": []
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.