x86/amd_node: Fix PCI device reference counting in amd_smn_init()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18, 6.18.53, 7.2.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 0a4b61d9c2e496b5f0a10e29e355a1465c8738bb · fixed in 84e3a71d11d8593c127b468d75b2653af5074f81; From 0a4b61d9c2e496b5f0a10e29e355a1465c8738bb · fixed in aa2a4277ad42fd8f918c6dc652473946a253f7b0; From 0a4b61d9c2e496b5f0a10e29e355a1465c8738bb · fixed in 27600805e62f800bacf990354632eae4e487d34c; From 6.17.8 · fixed in 6.18
- Linux Linux
6.18
- KernelLinux
From 6.18.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7