cve-2024-42265
Vulnerability from cvelistv5
Published
2024-08-17 08:54
Modified
2024-09-15 17:52
Severity ?
EPSS score ?
Summary
protect the fetch of ->fd[fd] in do_dup2() from mispredictions
References
{
"containers": {
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"content": {
"id": "CVE-2024-42265",
"options": [
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"Exploitation": "none"
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"Automatable": "no"
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"Technical Impact": "partial"
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"timestamp": "2024-09-10T16:12:30.860612Z",
"version": "2.0.3"
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"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/file.c"
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"vendor": "Linux",
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"vendor": "Linux",
"versions": [
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"status": "unaffected",
"version": "4.19.320",
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{
"lessThanOrEqual": "5.4.*",
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"version": "5.4.282",
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"version": "5.10.224",
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"version": "5.15.165",
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"version": "6.1.104",
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"version": "6.10.4",
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"status": "unaffected",
"version": "6.11",
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nprotect the fetch of -\u003efd[fd] in do_dup2() from mispredictions\n\nboth callers have verified that fd is not greater than -\u003emax_fds;\nhowever, misprediction might end up with\n tofree = fdt-\u003efd[fd];\nbeing speculatively executed. That\u0027s wrong for the same reasons\nwhy it\u0027s wrong in close_fd()/file_close_fd_locked(); the same\nsolution applies - array_index_nospec(fd, fdt-\u003emax_fds) could differ\nfrom fd only in case of speculative execution on mispredicted path."
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"dateUpdated": "2024-09-15T17:52:29.436Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26"
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"url": "https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a"
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{
"url": "https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368"
},
{
"url": "https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f"
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{
"url": "https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176"
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{
"url": "https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149"
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"url": "https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1"
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{
"url": "https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1"
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"title": "protect the fetch of -\u003efd[fd] in do_dup2() from mispredictions",
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"assignerShortName": "Linux",
"cveId": "CVE-2024-42265",
"datePublished": "2024-08-17T08:54:21.636Z",
"dateReserved": "2024-07-30T07:40:12.259Z",
"dateUpdated": "2024-09-15T17:52:29.436Z",
"state": "PUBLISHED"
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"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-42265\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-17T09:15:07.893\",\"lastModified\":\"2024-08-19T12:59:59.177\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nprotect the fetch of -\u003efd[fd] in do_dup2() from mispredictions\\n\\nboth callers have verified that fd is not greater than -\u003emax_fds;\\nhowever, misprediction might end up with\\n tofree = fdt-\u003efd[fd];\\nbeing speculatively executed. That\u0027s wrong for the same reasons\\nwhy it\u0027s wrong in close_fd()/file_close_fd_locked(); the same\\nsolution applies - array_index_nospec(fd, fdt-\u003emax_fds) could differ\\nfrom fd only in case of speculative execution on mispredicted path.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: proteger la recuperaci\u00f3n de -\u0026gt;fd[fd] en do_dup2() de predicciones err\u00f3neas; ambos llamadores han verificado que fd no es mayor que -\u0026gt;max_fds; sin embargo, una predicci\u00f3n err\u00f3nea podr\u00eda terminar con tofree = fdt-\u0026gt;fd[fd]; siendo ejecutado especulativamente. Eso est\u00e1 mal por las mismas razones por las que est\u00e1 mal en close_fd()/file_close_fd_locked(); se aplica la misma soluci\u00f3n: array_index_nospec(fd, fdt-\u0026gt;max_fds) podr\u00eda diferir de fd solo en caso de ejecuci\u00f3n especulativa en una ruta mal prevista.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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