CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
5.1%
In the Linux kernel, the following vulnerability has been resolved: iommu:
Don’t reserve 0-length IOVA region When the bootloader/firmware doesn’t
setup the framebuffers, their address and size are 0 in “iommu-addresses”
property. If IOVA region is reserved with 0 length, then it ends up
corrupting the IOVA rbtree with an entry which has pfn_hi < pfn_lo. If we
intend to use display driver in kernel without framebuffer then it’s
causing the display IOMMU mappings to fail as entire valid IOVA space is
reserved when address and length are passed as 0. An ideal solution would
be firmware removing the “iommu-addresses” property and corresponding
“memory-region” if display is not present. But the kernel should be able to
handle this by checking for size of IOVA region and skipping the IOVA
reservation if size is 0. Also, add a warning if firmware is requesting
0-length IOVA region reservation.
Author | Note |
---|---|
rodrigo-zaiden | USN-6765-1 for linux-oem-6.5 wrongly stated that this CVE was fixed in version 6.5.0-1022.23. The mentioned notice was revoked and the state of the fix for linux-oem-6.5 was recovered to the previous state. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 23.10 | noarch | linux | < 6.5.0-41.41 | UNKNOWN |
ubuntu | 23.10 | noarch | linux-aws | < 6.5.0-1021.21 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
ubuntu | 23.10 | noarch | linux-azure | < 6.5.0-1022.23 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-6.5 | < 6.5.0-1022.23~22.04.1 | UNKNOWN |
ubuntu | 23.10 | noarch | linux-gcp | < 6.5.0-1022.24 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-gcp-6.5 | < 6.5.0-1022.24~22.04.1 | UNKNOWN |
ubuntu | 22.04 | noarch | linux-hwe-6.5 | < 6.5.0-41.41~22.04.2 | UNKNOWN |
ubuntu | 23.10 | noarch | linux-laptop | < 6.5.0-1017.20 | UNKNOWN |
ubuntu | 23.10 | noarch | linux-lowlatency | < 6.5.0-41.41.1 | UNKNOWN |
git.kernel.org/stable/c/5e23e283910c9f30248732ae0770bcb0c9438abf
git.kernel.org/stable/c/98b8a550da83cc392a14298c4b3eaaf0332ae6ad
git.kernel.org/stable/c/bb57f6705960bebeb832142ce9abf43220c3eab1
launchpad.net/bugs/cve/CVE-2023-52455
nvd.nist.gov/vuln/detail/CVE-2023-52455
security-tracker.debian.org/tracker/CVE-2023-52455
ubuntu.com/security/notices/USN-6818-1
ubuntu.com/security/notices/USN-6818-2
ubuntu.com/security/notices/USN-6818-3
ubuntu.com/security/notices/USN-6818-4
ubuntu.com/security/notices/USN-6819-1
ubuntu.com/security/notices/USN-6819-2
ubuntu.com/security/notices/USN-6819-3
ubuntu.com/security/notices/USN-6819-4
www.cve.org/CVERecord?id=CVE-2023-52455