CVE-2019-15794

Katalog CVE

CVSS 6.7 · Medium EPSS 1,2%

Kerentanan Operation on a Resource after Expiration or Release pada linux kernel, canonical ubuntu linux. Skor CVSS 3.1 6.7 (Medium) menurut NVD.

Deskripsi (NVD)

Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.

Rincian

Terbit di NVD

24 April 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.7 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-672: Operation on a Resource after Expiration or Release

EPSS (30 hari)

1,2% peluang dieksploitasi; lebih tinggi dari 66,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3... mailing list · patch · advisory pihak ketiga
• https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203... mailing list · patch · advisory pihak ketiga
• https://usn.ubuntu.com/usn/usn-4208-1 advisory pihak ketiga
• https://usn.ubuntu.com/usn/usn-4209-1 advisory pihak ketiga