Bugzilla – Bug 1223388
VUL-0: CVE-2024-26926: kernel: binder: check offset alignment in binder_get_object()
Last modified: 2024-04-25 16:17:52 UTC
In the Linux kernel, the following vulnerability has been resolved: binder: check offset alignment in binder_get_object() Commit 6d98eb95b450 ("binder: avoid potential data leakage when copying txn") introduced changes to how binder objects are copied. In doing so, it unintentionally removed an offset alignment check done through calls to binder_alloc_copy_from_buffer() -> check_buffer(). These calls were replaced in binder_get_object() with copy_from_user(), so now an explicit offset alignment check is needed here. This avoids later complications when unwinding the objects gets harder. It is worth noting this check existed prior to commit 7a67a39320df ("binder: add function to copy binder object from buffer"), likely removed due to redundancy at the time. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26926 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26926.mbox https://git.kernel.org/stable/c/aaef73821a3b0194a01bd23ca77774f704a04d40 https://www.cve.org/CVERecord?id=CVE-2024-26926
We do not build binder, thus not affected. Back to security team.
Thanks for the update! If we are not affected, I will be closing this issue now.