mirror of
https://github.com/CVEProject/cvelist.git
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146 lines
8.7 KiB
JSON
146 lines
8.7 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2023-52854",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npadata: Fix refcnt handling in padata_free_shell()\n\nIn a high-load arm64 environment, the pcrypt_aead01 test in LTP can lead\nto system UAF (Use-After-Free) issues. Due to the lengthy analysis of\nthe pcrypt_aead01 function call, I'll describe the problem scenario\nusing a simplified model:\n\nSuppose there's a user of padata named `user_function` that adheres to\nthe padata requirement of calling `padata_free_shell` after `serial()`\nhas been invoked, as demonstrated in the following code:\n\n```c\nstruct request {\n struct padata_priv padata;\n struct completion *done;\n};\n\nvoid parallel(struct padata_priv *padata) {\n do_something();\n}\n\nvoid serial(struct padata_priv *padata) {\n struct request *request = container_of(padata,\n \t\t\t\tstruct request,\n\t\t\t\tpadata);\n complete(request->done);\n}\n\nvoid user_function() {\n DECLARE_COMPLETION(done)\n padata->parallel = parallel;\n padata->serial = serial;\n padata_do_parallel();\n wait_for_completion(&done);\n padata_free_shell();\n}\n```\n\nIn the corresponding padata.c file, there's the following code:\n\n```c\nstatic void padata_serial_worker(struct work_struct *serial_work) {\n ...\n cnt = 0;\n\n while (!list_empty(&local_list)) {\n ...\n padata->serial(padata);\n cnt++;\n }\n\n local_bh_enable();\n\n if (refcount_sub_and_test(cnt, &pd->refcnt))\n padata_free_pd(pd);\n}\n```\n\nBecause of the high system load and the accumulation of unexecuted\nsoftirq at this moment, `local_bh_enable()` in padata takes longer\nto execute than usual. Subsequently, when accessing `pd->refcnt`,\n`pd` has already been released by `padata_free_shell()`, resulting\nin a UAF issue with `pd->refcnt`.\n\nThe fix is straightforward: add `refcount_dec_and_test` before calling\n`padata_free_pd` in `padata_free_shell`."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "07928d9bfc81",
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"version_value": "41aad9d69539"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "5.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.201",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.139",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.63",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5.12",
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"lessThanOrEqual": "6.5.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.2",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.7",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/41aad9d6953984d134fc50f631f24ef476875d4d",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/41aad9d6953984d134fc50f631f24ef476875d4d"
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},
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{
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"url": "https://git.kernel.org/stable/c/0dd34a7ad395dbcf6ae60e48e9786050e25b9bc5",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/0dd34a7ad395dbcf6ae60e48e9786050e25b9bc5"
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},
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{
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"url": "https://git.kernel.org/stable/c/c7c26d0ef5d20f00dbb2ae3befcabbe0efa77275",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/c7c26d0ef5d20f00dbb2ae3befcabbe0efa77275"
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},
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{
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"url": "https://git.kernel.org/stable/c/1e901bcb8af19416b65f5063a4af7996e5a51d7f",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/1e901bcb8af19416b65f5063a4af7996e5a51d7f"
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},
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{
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"url": "https://git.kernel.org/stable/c/1734a79e951914f1db2c65e635012a35db1c674b",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/1734a79e951914f1db2c65e635012a35db1c674b"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ddc21e317b360c3444de3023bcc83b85fabae2f",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/7ddc21e317b360c3444de3023bcc83b85fabae2f"
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}
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]
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},
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"generator": {
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"engine": "bippy-9e1c9544281a"
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