ghsa-jg7c-h6xh-f8hr
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
quota: Fix potential NULL pointer dereference
Below race may cause NULL pointer dereference
P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) ....
If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered.
So let's fix it by using a temporary pointer to avoid this issue.
{
"affected": [],
"aliases": [
"CVE-2024-26878"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-17T11:15:09Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nquota: Fix potential NULL pointer dereference\n\nBelow race may cause NULL pointer dereference\n\nP1\t\t\t\t\tP2\ndquot_free_inode\t\t\tquota_off\n\t\t\t\t\t drop_dquot_ref\n\t\t\t\t\t remove_dquot_ref\n\t\t\t\t\t dquots = i_dquot(inode)\n dquots = i_dquot(inode)\n srcu_read_lock\n dquots[cnt]) != NULL (1)\n\t\t\t\t\t dquots[type] = NULL (2)\n spin_lock(\u0026dquots[cnt]-\u003edq_dqb_lock) (3)\n ....\n\nIf dquot_free_inode(or other routines) checks inode\u0027s quota pointers (1)\nbefore quota_off sets it to NULL(2) and use it (3) after that, NULL pointer\ndereference will be triggered.\n\nSo let\u0027s fix it by using a temporary pointer to avoid this issue.",
"id": "GHSA-jg7c-h6xh-f8hr",
"modified": "2024-06-27T12:30:45Z",
"published": "2024-04-17T12:32:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26878"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
}
],
"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.