CVE-2021-22555
First published: Wed Jul 07 2021(Updated: )
Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by a heap out-of-bounds write flaw in net/netfilter/x_tables.c. By sending a specially-crafted request through user name space, an authenticated attacker could exploit this vulnerability to gain elevated privileges or cause a denial of service condition.
Credit: cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.41.1.rt56.1181.el7 | 0:3.10.0-1160.41.1.rt56.1181.el7 |
| redhat/kernel | <0:3.10.0-1160.41.1.el7 | 0:3.10.0-1160.41.1.el7 |
| redhat/kernel | <0:3.10.0-327.100.1.el7 | 0:3.10.0-327.100.1.el7 |
| redhat/kernel | <0:3.10.0-514.92.1.el7 | 0:3.10.0-514.92.1.el7 |
| redhat/kernel | <0:3.10.0-693.94.1.el7 | 0:3.10.0-693.94.1.el7 |
| redhat/kernel | <0:3.10.0-957.84.1.el7 | 0:3.10.0-957.84.1.el7 |
| redhat/kernel | <0:3.10.0-1062.56.1.el7 | 0:3.10.0-1062.56.1.el7 |
| redhat/kernel-rt | <0:4.18.0-305.12.1.rt7.84.el8_4 | 0:4.18.0-305.12.1.rt7.84.el8_4 |
| redhat/kernel | <0:4.18.0-305.12.1.el8_4 | 0:4.18.0-305.12.1.el8_4 |
| redhat/kernel | <0:4.18.0-147.52.1.el8_1 | 0:4.18.0-147.52.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.64.1.rt13.115.el8_2 | 0:4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel | <0:4.18.0-193.64.1.el8_2 | 0:4.18.0-193.64.1.el8_2 |
| redhat/redhat-virtualization-host | <0:4.3.18-20210903.0.el7_9 | 0:4.3.18-20210903.0.el7_9 |
| redhat/redhat-virtualization-host | <0:4.4.7-20210804.0.el8_4 | 0:4.4.7-20210804.0.el8_4 |
| Linux Linux kernel | >=2.6.19<4.4.267 | |
| Linux Linux kernel | >=4.5<4.9.267 | |
| Linux Linux kernel | >=4.10<4.14.231 | |
| Linux Linux kernel | >=4.15<4.19.188 | |
| Linux Linux kernel | >=4.20<5.4.113 | |
| Linux Linux kernel | >=5.5<5.10.31 | |
| Linux Linux kernel | >=5.11<5.12 | |
| Brocade Fabric Operating System | ||
| Netapp Fas 8300 Firmware | ||
| Netapp Fas 8300 | ||
| Netapp Fas 8700 Firmware | ||
| Netapp Fas 8700 | ||
| Netapp Aff A400 Firmware | ||
| Netapp Aff A400 | ||
| Netapp Aff A250 Firmware | ||
| Netapp Aff A250 | ||
| Netapp Aff 500f Firmware | ||
| Netapp Aff 500f | ||
| Netapp H610c Firmware | ||
| Netapp H610c | ||
| Netapp H610s Firmware | ||
| Netapp H610s | ||
| Netapp H615c Firmware | ||
| Netapp H615c | ||
| Netapp Hci Management Node | ||
| Netapp Solidfire | ||
| IBM DRM | <=2.0.6 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://exchange.xforce.ibmcloud.com/vulnerabilities/204997
- https://www.ibm.com/support/pages/node/6497499 (Advisory)
- http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html
- http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html
- http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
- http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.html
- http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
- https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
- https://security.netapp.com/advisory/ntap-20210805-0010/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1980102
- https://access.redhat.com/errata/RHSA-2021:3044
- https://access.redhat.com/errata/RHSA-2021:3088
- https://access.redhat.com/errata/RHSA-2021:3057
- https://access.redhat.com/security/cve/cve-2021-22555
- https://access.redhat.com/errata/RHSA-2021:3173
- https://access.redhat.com/errata/RHSA-2021:3181
- https://access.redhat.com/errata/RHSA-2021:3235
- https://access.redhat.com/errata/RHSA-2021:3321
- https://access.redhat.com/errata/RHSA-2021:3375
- https://access.redhat.com/errata/RHSA-2021:3380
- https://access.redhat.com/errata/RHSA-2021:3327
- https://access.redhat.com/errata/RHSA-2021:3328
- https://access.redhat.com/errata/RHSA-2021:3363
- https://access.redhat.com/errata/RHSA-2021:3381
- https://access.redhat.com/errata/RHSA-2021:3399
- https://access.redhat.com/errata/RHSA-2021:3477
- https://access.redhat.com/errata/RHSA-2021:3522
- https://access.redhat.com/errata/RHSA-2021:3523
- https://access.redhat.com/errata/RHSA-2021:3725
- https://access.redhat.com/errata/RHSA-2021:3812
- https://access.redhat.com/errata/RHSA-2021:3814
- https://bugzilla.redhat.com/show_bug.cgi?id=1980101
- https://www.cve.org/CVERecord?id=CVE-2021-22555 https://nvd.nist.gov/vuln/detail/CVE-2021-22555 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2021-22555?
CVE-2021-22555 is a heap out-of-bounds write vulnerability affecting Linux kernel since v2.6.19-rc1 in the net/netfilter/x_tables component.
How does CVE-2021-22555 affect the system?
CVE-2021-22555 allows a local user to gain privileges or cause a denial-of-service (DoS) through user name space.
Which software versions are affected by CVE-2021-22555?
Linux kernel versions between v2.6.19-rc1 and 5.12 are affected by CVE-2021-22555.
What is the severity of CVE-2021-22555?
CVE-2021-22555 has a severity rating of 7.8 (High).
How can I fix CVE-2021-22555?
To fix CVE-2021-22555, update the Linux kernel to version 5.12 or apply the appropriate patches as recommended by the vendor.
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/ibm-support
- collector/nvd-index
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-22555
- agent/software-canonical-lookup
- collector/redhat-cve
- vendor/ibm
- canonical/ibm drm
- version/ibm drm/2.0.6
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/2.6.19
- version/linux linux kernel/4.5
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- version/linux linux kernel/5.5
- version/linux linux kernel/5.11
- vendor/brocade
- canonical/brocade fabric operating system
- vendor/netapp
- canonical/netapp fas 8300 firmware
- canonical/netapp fas 8300
- canonical/netapp fas 8700 firmware
- canonical/netapp fas 8700
- canonical/netapp aff a400 firmware
- canonical/netapp aff a400
- canonical/netapp aff a250 firmware
- canonical/netapp aff a250
- canonical/netapp aff 500f firmware
- canonical/netapp aff 500f
- canonical/netapp h610c firmware
- canonical/netapp h610c
- canonical/netapp h610s firmware
- canonical/netapp h610s
- canonical/netapp h615c firmware
- canonical/netapp h615c
- canonical/netapp hci management node
- canonical/netapp solidfire
- package-manager/redhat