CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-47678 – icmp: change the order of rate limits
https://notcve.org/view.php?id=CVE-2024-47678
In the Linux kernel, the following vulnerability has been resolved: icmp: change the order of rate limits ICMP messages are ratelimited : After the blamed commits, the two rate limiters are applied in this order: 1) host wide ratelimit (icmp_global_allow()) 2) Per destination ratelimit (inetpeer based) In order to avoid side-channels attacks, we need to apply the per destination check first. This patch makes the following change : 1) icmp_global_allow() checks if the host wide limit is reached. But credits are not yet consumed. This is deferred to 3) 2) The per destination limit is checked/updated. This might add a new node in inetpeer tree. 3) icmp_global_consume() consumes tokens if prior operations succeeded. This means that host wide ratelimit is still effective in keeping inetpeer tree small even under DDOS. As a bonus, I removed icmp_global.lock as the fast path can use a lock-free operation. • https://git.kernel.org/stable/c/4cdf507d54525842dfd9f6313fdafba039084046 https://git.kernel.org/stable/c/997ba8889611891f91e8ad83583466aeab6239a3 https://git.kernel.org/stable/c/662ec52260cc07b9ae53ecd3925183c29d34288b https://git.kernel.org/stable/c/a7722921adb046e3836eb84372241f32584bdb07 https://git.kernel.org/stable/c/483397b4ba280813e4a9c161a0a85172ddb43d19 https://git.kernel.org/stable/c/8c2bd38b95f75f3d2a08c93e35303e26d480d24e •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-47677 – exfat: resolve memory leak from exfat_create_upcase_table()
https://notcve.org/view.php?id=CVE-2024-47677
In the Linux kernel, the following vulnerability has been resolved: exfat: resolve memory leak from exfat_create_upcase_table() If exfat_load_upcase_table reaches end and returns -EINVAL, allocated memory doesn't get freed and while exfat_load_default_upcase_table allocates more memory, leading to a memory leak. Here's link to syzkaller crash report illustrating this issue: https://syzkaller.appspot.com/text?tag=CrashReport&x=1406c201980000 • https://git.kernel.org/stable/c/a13d1a4de3b0fe3c41d818697d691c886c5585fa https://git.kernel.org/stable/c/f9835aec49670c46ebe2973032caaa1043b3d4da https://git.kernel.org/stable/c/331ed2c739ce656a67865f6b3ee0a478349d78cb https://git.kernel.org/stable/c/c290fe508eee36df1640c3cb35dc8f89e073c8a8 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-47676 – mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway
https://notcve.org/view.php?id=CVE-2024-47676
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway Syzbot reports a UAF in hugetlb_fault(). This happens because vmf_anon_prepare() could drop the per-VMA lock and allow the current VMA to be freed before hugetlb_vma_unlock_read() is called. We can fix this by using a modified version of vmf_anon_prepare() that doesn't release the VMA lock on failure, and then release it ourselves after hugetlb_vma_unlock_read(). • https://git.kernel.org/stable/c/9acad7ba3e25d11f4c96df1b7312ae89e6faca5c https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876 https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-47675 – bpf: Fix use-after-free in bpf_uprobe_multi_link_attach()
https://notcve.org/view.php?id=CVE-2024-47675
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach() If bpf_link_prime() fails, bpf_uprobe_multi_link_attach() goes to the error_free label and frees the array of bpf_uprobe's without calling bpf_uprobe_unregister(). This leaks bpf_uprobe->uprobe and worse, this frees bpf_uprobe->consumer without removing it from the uprobe->consumers list. • https://git.kernel.org/stable/c/89ae89f53d201143560f1e9ed4bfa62eee34f88e https://git.kernel.org/stable/c/790c630ab0e7d7aba6d186581d4627c09fce60f3 https://git.kernel.org/stable/c/7c1d782e5afbf7c50ba74ecc4ddc18a05d63e5ee https://git.kernel.org/stable/c/cdf27834c3dd5d9abf7eb8e4ee87ee9e307eb25c https://git.kernel.org/stable/c/5fe6e308abaea082c20fbf2aa5df8e14495622cf •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-47674 – mm: avoid leaving partial pfn mappings around in error case
https://notcve.org/view.php?id=CVE-2024-47674
In the Linux kernel, the following vulnerability has been resolved: mm: avoid leaving partial pfn mappings around in error case As Jann points out, PFN mappings are special, because unlike normal memory mappings, there is no lifetime information associated with the mapping - it is just a raw mapping of PFNs with no reference counting of a 'struct page'. That's all very much intentional, but it does mean that it's easy to mess up the cleanup in case of errors. Yes, a failed mmap() will always eventually clean up any partial mappings, but without any explicit lifetime in the page table mapping itself, it's very easy to do the error handling in the wrong order. In particular, it's easy to mistakenly free the physical backing store before the page tables are actually cleaned up and (temporarily) have stale dangling PTE entries. To make this situation less error-prone, just make sure that any partial pfn mapping is torn down early, before any other error handling. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: evitar dejar asignaciones pfn parciales en caso de error Como señala Jann, las asignaciones PFN son especiales, porque a diferencia de las asignaciones de memoria normales, no hay información de duración asociada con la asignación: es solo una asignación sin procesar de PFN sin recuento de referencias de una 'página de estructura'. Todo eso es muy intencional, pero significa que es fácil arruinar la limpieza en caso de errores. Sí, un mmap() fallido siempre limpiará eventualmente cualquier asignación parcial, pero sin ninguna duración explícita en la asignación de la tabla de páginas en sí, es muy fácil hacer el manejo de errores en el orden incorrecto. • https://git.kernel.org/stable/c/5b2c8b34f6d76bfbd1dd4936eb8a0fbfb9af3959 https://git.kernel.org/stable/c/65d0db500d7c07f0f76fc24a4d837791c4862cd2 https://git.kernel.org/stable/c/a95a24fcaee1b892e47d5e6dcc403f713874ee80 https://git.kernel.org/stable/c/954fd4c81f22c4b6ba65379a81fd252971bf4ef3 https://git.kernel.org/stable/c/79a61cc3fc0466ad2b7b89618a6157785f0293b3 https://project-zero.issues.chromium.org/issues/366053091 •