UBUNTU-CVE-2023-52760
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix slab-use-after-free in gfs2_qd_dealloc In gfs2_put_super(), whether withdrawn or not, the quota should be cleaned up by gfs2_quota_cleanup(). Otherwise, struct gfs2_sbd will be freed before gfs2_qd_dealloc (rcu callback) has run for all gfs2_quota_data objects, resulting in use-after-free. Also, gfs2_destroy_threads() and gfs2_quota_cleanup() is already called by gfs2_make_fs_ro(), so in gfs2_put_super(), after calling gfs2_make_fs_ro(), there is no need to call them again.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
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12 explicit affected versions
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16 explicit affected versions
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13 explicit affected versions
43 explicit affected versions
49 explicit affected versions
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10 explicit affected versions
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14 explicit affected versions
84 explicit affected versions
4 explicit affected versions
73 explicit affected versions
11 explicit affected versions
1 explicit affected versions
45 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix slab-use-after-free in gfs2_qd_dealloc In gfs2_put_super(), whether withdrawn or not, the quota should be cleaned up by gfs2_quota_cleanup(). Otherwise, struct gfs2_sbd will be freed before gfs2_qd_dealloc (rcu callback) has run for all gfs2_quota_data objects, resulting in use-after-free. Also, gfs2_destroy_threads() and gfs2_quota_cleanup() is already called by gfs2_make_fs_ro(), so in gfs2_put_super(), after calling gfs2_make_fs_ro(), there is no need to call them again.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/bdcb8aa434c6d36b5c215d02a9ef07551be25a37
- https://git.kernel.org/stable/c/08a28272faa750d4357ea2cb48d2baefd778ea81
- https://git.kernel.org/stable/c/bdcb8aa434c6d36b5c215d02a9ef07551be25a37
- https://ubuntu.com/security/CVE-2023-52760
- https://ubuntu.com/security/notices/USN-6972-1
- https://ubuntu.com/security/notices/USN-6972-2
- https://ubuntu.com/security/notices/USN-6972-3
- https://ubuntu.com/security/notices/USN-6972-4
- https://ubuntu.com/security/notices/USN-6973-1
- https://ubuntu.com/security/notices/USN-6973-2
- https://ubuntu.com/security/notices/USN-6973-3
- https://ubuntu.com/security/notices/USN-6973-4
- https://ubuntu.com/security/notices/USN-6974-1
- https://ubuntu.com/security/notices/USN-6974-2
- https://ubuntu.com/security/notices/USN-6976-1
- https://ubuntu.com/security/notices/USN-7006-1
- https://ubuntu.com/security/notices/USN-7019-1
- https://www.cve.org/CVERecord?id=CVE-2023-52760