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redhat/kernelInteger overflow in TCP_SKB_CB(skb)->tcp_gso_segs

Risk 46
Severity
7.8
Integer Overflow
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

An integer overflow flaw was found in the way the Linux kernel's networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel's socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS).

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Remedy

For mitigation, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/tcpsack
First published (updated )
CVE-2019-11477

redhat/kernelLast updated 25 September 2025

Risk 46
Severity
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

An excessive resource consumption flaw was found in the way the Linux kernel's networking subsystem processed TCP segments. If the Maximum Segment Size (MSS) of a TCP connection was set to low values, such as 48 bytes, it can leave as little as 8 bytes for the user data, which significantly increases the Linux kernel's resource (CPU, Memory, and Bandwidth) utilization. A remote attacker could use this flaw to cause a denial of service (DoS) by repeatedly sending network traffic on a TCP connection with low TCP MSS.

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Remedy

For mitigation, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/tcpsack

Remedy

This can be mitigated by dropping all packets which specify a too small MSS value. For example, to only allow MSS values of greater than 500 bytes, an iptables rule can be specified as: sudo iptables -A INPUT -p tcp -m tcpmss --mss 1:500 -j DROP Note: this will only take effect if the net.ipv4.tcp_mtu_probing sysctl is disabled as well.
First published (updated )
CVE-2019-11479

debian/strongswanInteger Overflow

Risk 43
Severity
7.5
Integer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.

First published (updated )
CVE-2021-41991

Siemens 6gk5622-2gs00-2ac2 FirmwareA vulnerability has been identified in SCALANCE SC622-2C (All versions < V2.3), SCALANCE SC622-2C (A…

Risk 40
Severity
7.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

A vulnerability has been identified in SCALANCE SC622-2C (6GK5622-2GS00-2AC2) (All versions < V2.3), SCALANCE SC622-2C (6GK5622-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE SC626-2C (6GK5626-2GS00-2AC2) (All versions < V2.3), SCALANCE SC626-2C (6GK5626-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE SC632-2C (6GK5632-2GS00-2AC2) (All versions < V2.3), SCALANCE SC632-2C (6GK5632-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE SC636-2C (6GK5636-2GS00-2AC2) (All versions < V2.3), SCALANCE SC636-2C (6GK5636-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE SC642-2C (6GK5642-2GS00-2AC2) (All versions < V2.3), SCALANCE SC642-2C (6GK5642-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE SC646-2C (6GK5646-2GS00-2AC2) (All versions < V2.3), SCALANCE SC646-2C (6GK5646-2GS00-2AC2) (All versions >= V2.3 < V3.0), SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) (All versions < V2.0.0), SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) (All versions < V2.0.0), SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) (All versions < V2.0.0), SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) (All versions < V2.0.0), SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) (All versions < V2.0.0), SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) (All versions < V2.0.0), SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) (All versions < V2.0.0), SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) (All versions < V2.0.0), SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) (All versions < V2.0.0). Affected devices do not properly process CLI commands after a user forcefully quitted the SSH connection. This could allow an authenticated attacker to make the CLI via SSH or serial interface irresponsive.

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Source: MITRE
First published (updated )
CVE-2022-46144

Siemens Ruggedcom Rm1224 Lte\(4g\) Eu FirmwareWeak Encryption

Risk 40
Severity
7.1
Weak Encryption
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected devices use a weak encryption scheme to encrypt the debug zip file. This could allow an authenticated attacker to decrypt the contents of the file and retrieve debug information about the system.

First published (updated )
CVE-2022-46140

Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2)A vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) (All version…

Risk 29
Severity
6.3
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

A vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) (All versions < V8.2.1), RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2) (All versions < V8.2.1), SCALANCE M804PB (6GK5804-0AP00-2AA2) (All versions < V8.2.1), SCALANCE M812-1 ADSL-Router family (All versions < V8.2.1), SCALANCE M816-1 ADSL-Router family (All versions < V8.2.1), SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2) (All versions < V8.2.1), SCALANCE M874-2 (6GK5874-2AA00-2AA2) (All versions < V8.2.1), SCALANCE M874-3 (6GK5874-3AA00-2AA2) (All versions < V8.2.1), SCALANCE M874-3 3G-Router (CN) (6GK5874-3AA00-2FA2) (All versions < V8.2.1), SCALANCE M876-3 (6GK5876-3AA02-2BA2) (All versions < V8.2.1), SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2) (All versions < V8.2.1), SCALANCE M876-4 (6GK5876-4AA10-2BA2) (All versions < V8.2.1), SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2) (All versions < V8.2.1), SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2) (All versions < V8.2.1), SCALANCE MUB852-1 (A1) (6GK5852-1EA10-1AA1) (All versions < V8.2.1), SCALANCE MUB852-1 (B1) (6GK5852-1EA10-1BA1) (All versions < V8.2.1), SCALANCE MUM853-1 (A1) (6GK5853-2EA10-2AA1) (All versions < V8.2.1), SCALANCE MUM853-1 (B1) (6GK5853-2EA10-2BA1) (All versions < V8.2.1), SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1) (All versions < V8.2.1), SCALANCE MUM856-1 (A1) (6GK5856-2EA10-3AA1) (All versions < V8.2.1), SCALANCE MUM856-1 (B1) (6GK5856-2EA10-3BA1) (All versions < V8.2.1), SCALANCE MUM856-1 (CN) (6GK5856-2EA00-3FA1) (All versions < V8.2.1), SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1) (All versions < V8.2.1), SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1) (All versions < V8.2.1), SCALANCE S615 EEC LAN-Router (6GK5615-0AA01-2AA2) (All versions < V8.2.1), SCALANCE S615 LAN-Router (6GK5615-0AA00-2AA2) (All versions < V8.2.1), SCALANCE SC622-2C (6GK5622-2GS00-2AC2) (All versions < V3.2), SCALANCE SC626-2C (6GK5626-2GS00-2AC2) (All versions < V3.2), SCALANCE SC632-2C (6GK5632-2GS00-2AC2) (All versions < V3.2), SCALANCE SC636-2C (6GK5636-2GS00-2AC2) (All versions < V3.2), SCALANCE SC642-2C (6GK5642-2GS00-2AC2) (All versions < V3.2), SCALANCE SC646-2C (6GK5646-2GS00-2AC2) (All versions < V3.2). Affected devices improperly validate usernames during OpenVPN authentication. This could allow an attacker to get partial invalid usernames accepted by the server.

First published (updated )
CVE-2025-23384

Siemens Ruggedcom Rm1224 Lte\(4g\) Eu FirmwareAffected devices store the CLI user passwords encrypted in flash memory. Attackers with physical acc…

Risk 45
Severity
5.7
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Affected devices store the CLI user passwords encrypted in flash memory. Attackers with physical access to the device could retrieve the file and decrypt the CLI user passwords.

First published (updated )
CVE-2022-46142

Siemens Ruggedcom Rm1224 Lte\(4g\) Eu FirmwareAffected devices do not check the TFTP blocksize correctly. This could allow an authenticated attack…

Risk 23
Severity
5.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Affected devices do not check the TFTP blocksize correctly. This could allow an authenticated attacker to read from an uninitialized buffer that potentially contains previously allocated data.

First published (updated )
CVE-2022-46143

debian/curlInput Validation

Risk 23
Severity
4.3
Input Validation
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

A malicious server can serve excessive amounts of Set-Cookie: headers in a HTTP response to curl and curl < 7.84.0 stores all of them. A sufficiently large amount of (big) cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger than the threshold that curl uses internally to avoid sending crazy large requests (1048576 bytes) and instead returns an error.This denial state might remain for as long as the same cookies are kept, match and haven't expired. Due to cookie matching rules, a server on foo.example.com can set cookies that also would match for bar.example.com, making it it possible for a "sister server" to effectively cause a denial of service for a sibling site on the same second level domain using this method.

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First published (updated )
CVE-2022-32205

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