vulnwire
5.5med

CVE-2018-1093

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service…

Published 8 y ago · modified 4 mo ago · JSON

CVSS
5.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.9%
percentile 80%
Public exploits
0
none known

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

Exploit prediction (EPSS)

1.92% probability of exploitation in the next 30 days, higher than 80% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.05.5CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD2.07.1AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

  • n/a Linux kernel through version 4.15

Classification

Weakness
Technology feeds
Linux kernel (RSS, critical only)

References

  • usn.ubuntu.com /3752-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • usn.ubuntu.com /3676-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • lists.debian.org /debian-lts-announce/2018/07/msg00015.html · mailing-list, x_refsource_MLIST, x_transferred
  • openwall.com /lists/oss-security/2018/03/29/1 · x_refsource_MISC, x_transferred
  • usn.ubuntu.com /3752-3/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • lists.debian.org /debian-lts-announce/2018/07/msg00016.html · mailing-list, x_refsource_MLIST, x_transferred
  • lists.debian.org /debian-lts-announce/2018/06/msg00000.html · mailing-list, x_refsource_MLIST, x_transferred
  • bugzilla.kernel.org /show_bug.cgi?id=199181 · x_refsource_MISC, x_transferred
  • debian.org /security/2018/dsa-4188 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • usn.ubuntu.com /3754-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • git.kernel.org /pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f · x_refsource_MISC, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=1560782 · x_refsource_MISC, x_transferred
  • usn.ubuntu.com /3676-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • usn.ubuntu.com /3752-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred

Sources

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