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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2024-53198

xen: Fix the issue of resource not being properly released in xenbus_dev_probe()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: xen: Fix the issue of resource not being properly released in xenbus_dev_probe() This patch fixes an issue in the function xenbus_dev_probe(). In the xenbus_dev_probe() function, within the if (err) branch at line 313, the program incorrectly returns err directly without releasing the resources allocated by err = drv->probe(dev, id). As the return value is non-zero, the upper layers assume the processing logic has failed. However, the probe operation was performed earlier without a corresponding remove operation. Since the probe actually allocates resources, failing to perform the remove operation could lead to problems. To fix this issue, we followed the resource release logic of the xenbus_dev_remove() function by adding a new block fail_remove before the fail_put block. After entering the branch if (err) at line 313, the function will use a goto statement to jump to the fail_remove block, ensuring that the previously acquired resources are correctly released, thus preventing the reference count leak. This bug was identified by an experimental static analysis tool developed by our team. The tool specializes in analyzing reference count operations and detecting potential issues where resources are not properly managed. In this case, the tool flagged the missing release operation as a potential problem, which led to the development of this patch.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 87106169b4ce26f85561f953d13d1fd86d99b612affected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 0aa9e30b5b4af5dd504801689d6d84c584290a45affected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < e8823e6ff313465910edea07581627d85e68d9fdaffected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 3fc0996d2fefe61219375fd650601724b8cf2d30affected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 804b96f8d0a02fa10b92f28b2e042f9128ed3ffcaffected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 217bdce88b104269b73603b84d0ab4dd04f481bcaffected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < 2f977a4c82d35d063f5fe198bbc501c4b1c5ea0eaffected
  • 4bac07c993d03434ea902d3d4290d9e45944b66c to < afc545da381ba0c651b2658966ac737032676f01affected

Linux Linux

Default version status: affected

  • 2.6.23affected
  • 0 to < 2.6.23unaffected
  • 5.4.287 to ≤ 5.4.*unaffected
  • 5.10.231 to ≤ 5.10.*unaffected
  • 5.15.174 to ≤ 5.15.*unaffected
  • 6.1.120 to ≤ 6.1.*unaffected
  • 6.6.64 to ≤ 6.6.*unaffected
  • 6.11.11 to ≤ 6.11.*unaffected
  • 6.12.2 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References