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PUBLISHED

CVE-2024-26993

fs: sysfs: Fix reference leak in sysfs_break_active_protection()

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

Description

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.

Product status

Default status
unaffected

2afc9166f79b before f28bba37fe24
affected

2afc9166f79b before 57baab0f376b
affected

2afc9166f79b before 84bd4c2ae9c3
affected

2afc9166f79b before 43f00210cb25
affected

2afc9166f79b before 5d43e072285e
affected

2afc9166f79b before ac107356aabc
affected

2afc9166f79b before a4c99b57d43b
affected

2afc9166f79b before a90bca2228c0
affected

Default status
affected

4.19
affected

Any version before 4.19
unaffected

4.19.313
unaffected

5.4.275
unaffected

5.10.216
unaffected

5.15.157
unaffected

6.1.88
unaffected

6.6.29
unaffected

6.8.8
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5

https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063

https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17

https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c

https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b

https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957

https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4

https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78

cve.org CVE-2024-26993

nvd.nist.gov CVE-2024-26993

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