firmware: arm_scmi: Fix SCMI device destroy lifetimes
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.6.160, 6.12.114, 5.16, 6.2, 6.15, and 2 more
- 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: firmware: arm_scmi: Fix SCMI device destroy lifetimes scmi_child_dev_find() drops the reference returned by device_find_child() before returning the scmi_device pointer. A concurrent unregister can then release the device while the destroy path is still using the returned pointer. Make the lookup helper return the device_find_child() reference and keep it until scmi_device_destroy() has finished unregistering the child. Also split device_unregister() in __scmi_device_destroy() so the SCMI bus ID is not made reusable until after device_del() has removed the old scmi_dev.N name from sysfs. This avoids a new SCMI device reusing the same ID while the old device is still registered. The final device release callback is also a possible cleanup path when SCMI children are deleted by driver core recursion rather than __scmi_device_destroy(). Release the SCMI bus ID from a common helper used by destroy, register-failure and final-release paths, and clear scmi_dev->id after freeing it so the final release cannot free the same ID again.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3 · fixed in d8ecdceeb90cd2c265b222a7b65487faf68fea73; From 969d8beaa2e374387bf9aa5602ef84fc50bb48d8 · fixed in 916e27f71a80f6d77c48d1a1a5782d6d5ef9017c; From 9ca67840c0ddf3f39407339624cef824a4f27599 · fixed in a60bc2df2d323cc1342f0cf95563cae266801e20; From 9ca67840c0ddf3f39407339624cef824a4f27599 · fixed in c59b3393df1348a12308aaabd5fbc58ed6b21cf5; From 9ca67840c0ddf3f39407339624cef824a4f27599 · fixed in 6abe8fe36b29ff51d1a42c2f338972883f4751a5; From 6.6.90 · fixed in 6.6.160; From 6.12.28 · fixed in 6.12.114; From 5.15.182 · fixed in 5.16; From 6.1.138 · fixed in 6.2; From 6.14.6 · fixed in 6.15
- Linux Linux
6.15
- KernelLinux
fixed in 6.6.160; From 6.7.0 · fixed in 6.12.114; From 6.13.0 · fixed in 6.18.57; From 6.15.0 · fixed in 7.2.6