kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS
Published Oct 6, 2020
5.5
MEDIUMCVSS 3.1
EPSS 0.39%
Description
A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected products
- Vendor n/a Product Kernel Defaultn/a
- Version kernel versions before 5.9-rc7StatusaffectedConstraints-
- 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 | Kernel | n/a |
|
Configuration 1
- ≤ 5.8.13
- 5.9.0
- 5.9.0
- 5.9.0
- 5.9.0
- 5.9.0
- 5.9.0
- 5.9.0
Configuration 2
- 7.0
- 8.0
Configuration 4
- 9.0
Configuration 5
- 18.04
- 20.04
No data.
Red Hat Enterprise Linux 7
kernel-alt-0:4.14.0-115.33.1.el7a
Fixed · RHSA-2020:5079
Red Hat Enterprise Linux 8
kernel-0:4.18.0-240.el8
Fixed · RHSA-2020:4431
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-240.rt7.54.el8
Fixed · RHSA-2020:4609
Red Hat Enterprise Linux 8.1 Extended Update Support
kernel-0:4.18.0-147.34.1.el8_1
Fixed · RHSA-2020:5374
Red Hat Enterprise Linux 8.2 Extended Update Support
kernel-0:4.18.0-193.40.1.el8_2
Fixed · RHSA-2021:0073
Red Hat Enterprise Linux 8.2 Extended Update Support
kernel-rt-0:4.18.0-193.40.1.rt13.90.el8_2
Fixed · RHSA-2021:0136
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-alt-0:4.14.0-115.33.1.el7a | Fixed | RHSA-2020:5079 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-240.el8 | Fixed | RHSA-2020:4431 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-240.rt7.54.el8 | Fixed | RHSA-2020:4609 |
| Red Hat Enterprise Linux 8.1 Extended Update Support | kernel-0:4.18.0-147.34.1.el8_1 | Fixed | RHSA-2020:5374 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel-0:4.18.0-193.40.1.el8_2 | Fixed | RHSA-2021:0073 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel-rt-0:4.18.0-193.40.1.rt13.90.el8_2 | Fixed | RHSA-2021:0136 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel | Out of support scope | 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 (13)
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/10/06/9 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2020-25641 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1881424 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-18307 Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124 x_refsource_MISCMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-25641
- https://usn.ubuntu.com/4576-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-25641
- https://www.kernel.org/doc/html/latest/block/biovecs.html x_refsource_MISCVendor Advisory
Change history (0)
No recorded changes yet.