Threats Tagged 'cve-2025-38084'

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: x86/CPU/AMD: Terminate the erratum_1386_microcode array (CVE-2024-56721) * kernel: crypto: algif_hash - fix double free in hash_accept (CVE-2025-38079) * kernel: mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084) * kernel: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race (CVE-2025-38085) * kernel: wifi: rtw88: fix the 'para' buffer size to avoid reading out of bounds (CVE-2025-38159) * kernel: PCI/pwrctrl: Cancel outstanding rescan work when unregistering (CVE-2025-38137) * kernel: wifi: ath12k: fix invalid access to memory (CVE-2025-38292) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: unshare page tables during VMA split, not before Currently, __split_vma() triggers hugetlb page table unsharing through vm_ops->may_split(). This happens before the VMA lock and rmap locks are taken - which is too early, it allows racing VMA-locked page faults in our process and racing rmap walks from other processes to cause page tables to be shared again before we actually perform the split. Fix it by explicitly calling into the hugetlb unshare logic from __split_vma() in the same place where THP splitting also happens. At that point, both the VMA and the rmap(s) are write-locked. An annoying detail is that we can now call into the helper hugetlb_unshare_pmds() from two different locking contexts: 1. from hugetlb_split(), holding: - mmap lock (exclusively) - VMA lock - file rmap lock (exclusively) 2. hugetlb_unshare_all_pmds(), which I think is designed to be able to call us with only the mmap lock held (in shared mode), but currently only runs while holding mmap lock (exclusively) and VMA lock Backporting note: This commit fixes a racy protection that was introduced in commit b30c14cd6102 ("hugetlb: unshare some PMDs when splitting VMAs"); that commit claimed to fix an issue introduced in 5.13, but it should actually also go all the way back. [[email protected]: v2]

CVE-2024-28956 is an information disclosure vulnerability affecting some Intel processors. It involves exposure of sensitive information through shared microarchitectural structures during transient execution. The vulnerability requires local authenticated access and has a medium severity rating with a CVSS score of 5.7. Red Hat has released updates for the Linux kernel and microcode_ctl packages to address this issue in Red Hat Enterprise Linux 9. Users must apply these updates and reboot their systems to mitigate the vulnerability.