CVE-2025-38445 (GCVE-0-2025-38445)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2025-11-03 17:38
VLAI?
Title
md/raid1: Fix stack memory use after return in raid1_reshape
Summary
In the Linux kernel, the following vulnerability has been resolved: md/raid1: Fix stack memory use after return in raid1_reshape In the raid1_reshape function, newpool is allocated on the stack and assigned to conf->r1bio_pool. This results in conf->r1bio_pool.wait.head pointing to a stack address. Accessing this address later can lead to a kernel panic. Example access path: raid1_reshape() { // newpool is on the stack mempool_t newpool, oldpool; // initialize newpool.wait.head to stack address mempool_init(&newpool, ...); conf->r1bio_pool = newpool; } raid1_read_request() or raid1_write_request() { alloc_r1bio() { mempool_alloc() { // if pool->alloc fails remove_element() { --pool->curr_nr; } } } } mempool_free() { if (pool->curr_nr < pool->min_nr) { // pool->wait.head is a stack address // wake_up() will try to access this invalid address // which leads to a kernel panic return; wake_up(&pool->wait); } } Fix: reinit conf->r1bio_pool.wait after assigning newpool.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < d8a6853d00fbaa810765c8ed2f452a5832273968 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 12b00ec99624f8da8c325f2dd6e807df26df0025 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 48da050b4f54ed639b66278d0ae6f4107b2c4e2d (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 5f35e48b76655e45522df338876dfef88dafcc71 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < df5894014a92ff0196dbc212a7764e97366fd2b7 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 776e6186dc9ecbdb8a1b706e989166c8a99bbf64 (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < 61fd5e93006cf82ec8ee5c115ab5cf4bbd104bdb (git)
Affected: afeee514ce7f4cab605beedd03be71ebaf0c5fc8 , < d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98 (git)
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    Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.15.7 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: Fix stack memory use after return in raid1_reshape\n\nIn the raid1_reshape function, newpool is\nallocated on the stack and assigned to conf-\u003er1bio_pool.\nThis results in conf-\u003er1bio_pool.wait.head pointing\nto a stack address.\nAccessing this address later can lead to a kernel panic.\n\nExample access path:\n\nraid1_reshape()\n{\n\t// newpool is on the stack\n\tmempool_t newpool, oldpool;\n\t// initialize newpool.wait.head to stack address\n\tmempool_init(\u0026newpool, ...);\n\tconf-\u003er1bio_pool = newpool;\n}\n\nraid1_read_request() or raid1_write_request()\n{\n\talloc_r1bio()\n\t{\n\t\tmempool_alloc()\n\t\t{\n\t\t\t// if pool-\u003ealloc fails\n\t\t\tremove_element()\n\t\t\t{\n\t\t\t\t--pool-\u003ecurr_nr;\n\t\t\t}\n\t\t}\n\t}\n}\n\nmempool_free()\n{\n\tif (pool-\u003ecurr_nr \u003c pool-\u003emin_nr) {\n\t\t// pool-\u003ewait.head is a stack address\n\t\t// wake_up() will try to access this invalid address\n\t\t// which leads to a kernel panic\n\t\treturn;\n\t\twake_up(\u0026pool-\u003ewait);\n\t}\n}\n\nFix:\nreinit conf-\u003er1bio_pool.wait after assigning newpool."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:22:28.949Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/12b00ec99624f8da8c325f2dd6e807df26df0025"
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          "url": "https://git.kernel.org/stable/c/48da050b4f54ed639b66278d0ae6f4107b2c4e2d"
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          "url": "https://git.kernel.org/stable/c/5f35e48b76655e45522df338876dfef88dafcc71"
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          "url": "https://git.kernel.org/stable/c/df5894014a92ff0196dbc212a7764e97366fd2b7"
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        {
          "url": "https://git.kernel.org/stable/c/d67ed2ccd2d1dcfda9292c0ea8697a9d0f2f0d98"
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      "title": "md/raid1: Fix stack memory use after return in raid1_reshape",
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