CVE-2021-47245
published 2024-05-21CVE-2021-47245: In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fix out of bounds when parsing TCP options The TCP option parser in…
PriorityP430high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.26%
18.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option parser in synproxy (synproxy_parse_options) could read
one byte out of bounds. When the length is 1, the execution flow gets
into the loop, reads one byte of the opcode, and if the opcode is
neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds
the length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
out of bounds when parsing TCP options.").
v2 changes:
Added an early return when length < 0 to avoid calling
skb_header_pointer with negative length.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.46-1 (bookworm) | linux 5.10.46-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8 | e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8 |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 576c1526b4d83c44ad7b673cb841f36cbc6cb6c4 | 576c1526b4d83c44ad7b673cb841f36cbc6cb6c4 |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 674b5f0c6a4fc5d3abce877048290cea6091fcb1 | 674b5f0c6a4fc5d3abce877048290cea6091fcb1 |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 7d9a9a1a88a3da574e019b4de756bc73337b3b0b | 7d9a9a1a88a3da574e019b4de756bc73337b3b0b |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 6defc77d48eff74075b80ad5925061b2fc010d98 | 6defc77d48eff74075b80ad5925061b2fc010d98 |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 9cdf299ba4e153b5e56187648420de22c6216f02 | 9cdf299ba4e153b5e56187648420de22c6216f02 |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < f648089337cb8ed40b2bb96e244f72b9d97dc96b | f648089337cb8ed40b2bb96e244f72b9d97dc96b |
| linux | linux | >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 5fc177ab759418c9537433e63301096e733fb915 | 5fc177ab759418c9537433e63301096e733fb915 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 4.4.0-268.302 | 4.4.0-268.302 |
| linux | linux_kernel | >= 3.12 < 4.4.274 | 4.4.274 |
| linux | linux_kernel | >= 4.10 < 4.14.238 | 4.14.238 |
| linux | linux_kernel | >= 4.15 < 4.19.196 | 4.19.196 |
| linux | linux_kernel | >= 4.20 < 5.4.128 | 5.4.128 |
| linux | linux_kernel | >= 4.5 < 4.9.274 | 4.9.274 |
| linux | linux_kernel | >= 5.11 < 5.12.13 | 5.12.13 |
| linux | linux_kernel | >= 5.5 < 5.10.46 | 5.10.46 |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
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Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-12·CVSS 7.8
CVE-2024-56650 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
Ubuntu
Linux kernel (AWS) vulnerabilities
vendor_ubuntu·2025-05-12·CVSS 7.8
CVE-2023-52741 [HIGH] Linux kernel (AWS) vulnerabilities
Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file s
Red Hat
kernel: netfilter: synproxy: Fix out of bounds when parsing TCP options
vendor_redhat·2024-05-21·CVSS 7.1
CVE-2021-47245 [HIGH] CWE-125 kernel: netfilter: synproxy: Fix out of bounds when parsing TCP options
kernel: netfilter: synproxy: Fix out of bounds when parsing TCP options
In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option parser in synproxy (synproxy_parse_options) could read
one byte out of bounds. When the length is 1, the execution flow gets
into the loop, reads one byte of the opcode, and if the opcode is
neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds
the length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
out of bounds when parsing TCP options.").
v2 changes:
Added an early return when length < 0 to avoid calling
skb_header_pointer with negative length.
A vulnerability was found in the Linux kernel's netfilter system, in the s
Debian
CVE-2021-47245: linux - In the Linux kernel, the following vulnerability has been resolved: netfilter: ...
vendor_debian·2021·CVSS 7.1
CVE-2021-47245 [HIGH] CVE-2021-47245: linux - In the Linux kernel, the following vulnerability has been resolved: netfilter: ...
In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fix out of bounds when parsing TCP options The TCP option parser in synproxy (synproxy_parse_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options."). v2 changes: Added an early return when length < 0 to avoid calling skb_header_pointer with negative length.
Scope: local
bookworm: resolved (fixed in 5.10.46-1)
bullseye: resolved (fixed in 5.10.46-1)
forky: resolved (fixed in 5.10.46-1)
sid: resolved (fix
OSV
linux-lts-xenial vulnerabilities
osv·2025-05-13·CVSS 7.8
CVE-2022-23041 [HIGH] linux-lts-xenial vulnerabilities
linux-lts-xenial vulnerabilities
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file sys
OSV
linux-fips vulnerabilities
osv·2025-05-12·CVSS 7.8
CVE-2022-23041 [HIGH] linux-fips vulnerabilities
linux-fips vulnerabilities
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (N
OSV
linux-aws vulnerabilities
osv·2025-05-12·CVSS 7.8
CVE-2022-23041 [HIGH] linux-aws vulnerabilities
linux-aws vulnerabilities
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NF
OSV
linux, linux-aws, linux-kvm vulnerabilities
osv·2025-05-12·CVSS 7.8
CVE-2022-23041 [HIGH] linux, linux-aws, linux-kvm vulnerabilities
linux, linux-aws, linux-kvm vulnerabilities
Demi Marie Obenour and Simon Gaiser discovered that several Xen para-
virtualization device frontends did not properly restrict the access rights
of device backends. An attacker could possibly use a malicious Xen backend
to gain access to memory pages of a guest VM or cause a denial of service
in the guest. (CVE-2022-23041)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Hardware crypto device drivers;
- GPU drivers;
- IIO subsystem;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- SPI subsystem;
- USB Gadget drivers;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Netwo
GHSA
GHSA-ch44-784c-7wgq: In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option p
ghsa_unreviewed·2024-05-21
CVE-2021-47245 [HIGH] CWE-125 GHSA-ch44-784c-7wgq: In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option p
In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: Fix out of bounds when parsing TCP options
The TCP option parser in synproxy (synproxy_parse_options) could read
one byte out of bounds. When the length is 1, the execution flow gets
into the loop, reads one byte of the opcode, and if the opcode is
neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds
the length of 1.
This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack
out of bounds when parsing TCP options.").
v2 changes:
Added an early return when length < 0 to avoid calling
skb_header_pointer with negative length.
OSV
CVE-2021-47245: In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fix out of bounds when parsing TCP options The TCP option par
osv·2024-05-21·CVSS 7.1
CVE-2021-47245 [HIGH] CVE-2021-47245: In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fix out of bounds when parsing TCP options The TCP option par
In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: Fix out of bounds when parsing TCP options The TCP option parser in synproxy (synproxy_parse_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options."). v2 changes: Added an early return when length < 0 to avoid calling skb_header_pointer with negative length.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/576c1526b4d83c44ad7b673cb841f36cbc6cb6c4https://git.kernel.org/stable/c/5fc177ab759418c9537433e63301096e733fb915https://git.kernel.org/stable/c/674b5f0c6a4fc5d3abce877048290cea6091fcb1https://git.kernel.org/stable/c/6defc77d48eff74075b80ad5925061b2fc010d98https://git.kernel.org/stable/c/7d9a9a1a88a3da574e019b4de756bc73337b3b0bhttps://git.kernel.org/stable/c/9cdf299ba4e153b5e56187648420de22c6216f02https://git.kernel.org/stable/c/e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8https://git.kernel.org/stable/c/f648089337cb8ed40b2bb96e244f72b9d97dc96bhttps://git.kernel.org/stable/c/576c1526b4d83c44ad7b673cb841f36cbc6cb6c4https://git.kernel.org/stable/c/5fc177ab759418c9537433e63301096e733fb915https://git.kernel.org/stable/c/674b5f0c6a4fc5d3abce877048290cea6091fcb1https://git.kernel.org/stable/c/6defc77d48eff74075b80ad5925061b2fc010d98https://git.kernel.org/stable/c/7d9a9a1a88a3da574e019b4de756bc73337b3b0bhttps://git.kernel.org/stable/c/9cdf299ba4e153b5e56187648420de22c6216f02https://git.kernel.org/stable/c/e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8https://git.kernel.org/stable/c/f648089337cb8ed40b2bb96e244f72b9d97dc96b
2024-05-21
Published