CVE-2019-20812
published 2020-06-03CVE-2019-20812: An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service…
PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.44%
36.2th percentile
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.4.8-1 (bookworm) | linux 5.4.8-1 (bookworm) |
| linux | linux_kernel | < 5.4.7 | 5.4.7 |
| linux | linux_kernel | >= 0 < 5.4.8-1 | 5.4.8-1 |
| linux | linux_kernel | >= 0 < 5.4.8-1 | 5.4.8-1 |
| linux | linux_kernel | >= 0 < 5.4.8-1 | 5.4.8-1 |
| linux | linux_kernel | >= 0 < 5.4.8-1 | 5.4.8-1 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: af_packet: TPACKET_V3: invalid timer timeout on error
vendor_redhat·2019-12-09·CVSS 5.5
CVE-2019-20812 [MEDIUM] CWE-400 kernel: af_packet: TPACKET_V3: invalid timer timeout on error
kernel: af_packet: TPACKET_V3: invalid timer timeout on error
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
A flaw was found in the way the af_packet functionality in the Linux kernel handled the retirement timer setting for TPACKET_v3 when getting settings from the underlying network device errors out. This flaw allows a local user who can open the af_packet domain socket and who can hit the error path, to use this vulnerability to starve the system.
Statement: This issue is rated as having Moderate impact because of the preconditions needed to trigger the error code path an
Debian
CVE-2019-20812: linux - An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_bl...
vendor_debian·2019·CVSS 5.5
CVE-2019-20812 [MEDIUM] CVE-2019-20812: linux - An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_bl...
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
Scope: local
bookworm: resolved (fixed in 5.4.8-1)
bullseye: resolved (fixed in 5.4.8-1)
forky: resolved (fixed in 5.4.8-1)
sid: resolved (fixed in 5.4.8-1)
trixie: resolved (fixed in 5.4.8-1)
GHSA
GHSA-vqww-4qr9-q8f7: An issue was discovered in the Linux kernel before 5
ghsa_unreviewed·2022-05-24
CVE-2019-20812 [MEDIUM] CWE-400 GHSA-vqww-4qr9-q8f7: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
OSV
CVE-2019-20812: An issue was discovered in the Linux kernel before 5
osv·2020-06-03·CVSS 5.5
CVE-2019-20812 [MEDIUM] CVE-2019-20812: An issue was discovered in the Linux kernel before 5
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error
bugzilla·2020-06-11·CVSS 5.5
CVE-2019-20812 [MEDIUM] CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error
CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error
An issue was discovered in the Linux kernel. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3.
Discussion:
Statement:
This issue is rated as having Moderate impact because of the preconditions needed to trigger the error code path and privileges required (CAP_NET_RAW).
---
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.
---
Created kernel tracking bugs for this issue:
Affects: fedor
Bugzilla
CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error [fedora-all]
bugzilla·2020-06-11·CVSS 5.5
CVE-2019-20812 [MEDIUM] CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error [fedora-all]
CVE-2019-20812 kernel: af_packet: TPACKET_V3: invalid timer timeout on error [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple suppor
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fehttps://www.oracle.com/security-alerts/cpuApr2021.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fehttps://www.oracle.com/security-alerts/cpuApr2021.html
2020-06-03
Published