kernel: KASLR Prefetch Bypass Breaks KPTI
Published Jan 11, 2023
5.5
MEDIUMCVSS 3.1
EPSS 0.95%
Description
A flaw named "EntryBleed" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.
Affected products
- Vendor n/a Product Linux kernel Defaultn/a
- Version all versionsStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Linux kernel | n/a |
|
- n/a
No data.
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise Linux 8
kernel
Affected
Red Hat Enterprise Linux 8
kernel-rt
Affected
Red Hat Enterprise Linux 9
kernel
Affected
Red Hat Enterprise Linux 9
kernel-rt
Affected
Red Hat Virtualization 4
redhat-virtualization-host
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | n/a |
| Red Hat Virtualization 4 | redhat-virtualization-host | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References (7)
- https://access.redhat.com/security/cve/CVE-2022-4543 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2153871 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-51878 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-4543
- https://www.cve.org/CVERecord?id=CVE-2022-4543
- https://www.openwall.com/lists/oss-security/2022/12/16/3 ExploitMailing ListThird Party Advisory
- https://www.willsroot.io/2022/12/entrybleed.html ExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-4543 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2153871 | Issue Tracking | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-51878 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-4543 | ||
| https://www.cve.org/CVERecord?id=CVE-2022-4543 | ||
| https://www.openwall.com/lists/oss-security/2022/12/16/3 | ExploitMailing ListThird Party Advisory | |
| https://www.willsroot.io/2022/12/entrybleed.html | ExploitThird Party Advisory |
Change history (0)
No recorded changes yet.