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{
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"data_version" : "4.0" ,
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"data_type" : "CVE" ,
"data_format" : "MITRE" ,
"CVE_data_meta" : {
"ID" : "CVE-2024-26878" ,
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"ASSIGNER" : "cve@kernel.org" ,
"STATE" : "PUBLIC"
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} ,
"description" : {
"description_data" : [
{
"lang" : "eng" ,
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"value" : "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(&dquots[cnt]->dq_dqb_lock) (3)\n ....\n\nIf dquot_free_inode(or other routines) checks inode's 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's fix it by using a temporary pointer to avoid this issue."
}
]
} ,
"problemtype" : {
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{
"description" : [
{
"lang" : "eng" ,
"value" : "n/a"
}
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}
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} ,
"affects" : {
"vendor" : {
"vendor_data" : [
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"vendor_name" : "Linux" ,
"product" : {
"product_data" : [
{
"product_name" : "Linux" ,
"version" : {
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"version_affected" : "<" ,
"version_name" : "1da177e4c3f4" ,
"version_value" : "8514899c1a4e"
} ,
{
"version_value" : "not down converted" ,
"x_cve_json_5_version_data" : {
"versions" : [
{
"version" : "4.19.311" ,
"lessThanOrEqual" : "4.19.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "5.4.273" ,
"lessThanOrEqual" : "5.4.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "5.10.214" ,
"lessThanOrEqual" : "5.10.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "5.15.153" ,
"lessThanOrEqual" : "5.15.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "6.1.83" ,
"lessThanOrEqual" : "6.1.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "6.6.23" ,
"lessThanOrEqual" : "6.6.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "6.7.11" ,
"lessThanOrEqual" : "6.7.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
"version" : "6.8.2" ,
"lessThanOrEqual" : "6.8.*" ,
"status" : "unaffected" ,
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"versionType" : "semver"
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} ,
{
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"version" : "6.9" ,
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"lessThanOrEqual" : "*" ,
"status" : "unaffected" ,
"versionType" : "original_commit_for_fix"
}
] ,
"defaultStatus" : "affected"
}
}
]
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}
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}
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} ,
"references" : {
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"url" : "https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1" ,
"refsource" : "MISC" ,
"name" : "https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1"
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{
"url" : "https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0" ,
"refsource" : "MISC" ,
"name" : "https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0"
} ,
{
"url" : "https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0" ,
"refsource" : "MISC" ,
"name" : "https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0"
} ,
{
"url" : "https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25" ,
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"name" : "https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25"
} ,
{
"url" : "https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754" ,
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"name" : "https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754"
} ,
{
"url" : "https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5" ,
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"name" : "https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5"
} ,
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"url" : "https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7" ,
"refsource" : "MISC" ,
"name" : "https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7"
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{
"url" : "https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877" ,
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"name" : "https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877"
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"url" : "https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f" ,
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"name" : "https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f"
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}
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