Linux Kernel up to 5.17.3 poly1305_glue.c poly1305_update_arch link_len buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.17.3. Affected is the function poly1305_update_arch of the file arch/x86/crypto/poly1305_glue.c. Such manipulation of the argument link_len leads to buffer overflow. This vulnerability is uniquely identified as CVE-2022-49058. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.17.3. Affected by this issue is the function poly1305_update_arch of the file arch/x86/crypto/poly1305_glue.c. The manipulation of the argument link_len with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: cifs: potential buffer overflow in handling symlinks Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max) It's caused because Smatch marks 'link_len' as untrusted since it comes from sscanf(). Add a check to ensure that 'link_len' is not larger than the size of the 'link_str' buffer.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2022-49058 since 02/26/2025. The exploitation is known to be easy. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/27/2025).

The vulnerability scanner Nessus provides a plugin with the ID 238226 (EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-1635)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.311, 4.14.276, 4.19.239, 5.4.190, 5.10.112, 5.15.35 or 5.17.4 eliminates this vulnerability. Applying the patch 3e582749e742e662a8e9bb37cffac62dccaaa1e2/1316c28569a80ab3596eeab05bf5e01991e7e739/eb5f51756944735ac70cd8bb38637cc202e29c91/22d658c6c5affed10c8907e67160cef0b6c92186/4e166a41180be2f1e66bbb6d46448e80a9a5ec05/9901b07ba42b39266b34a888e48d7306fd707bee/515e7ba11ef043d6febe69389949c8ef5f25e9d0/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (238226) and CERT Bund (WID-SEC-2025-1905). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.310
• 4.14.275
• 4.19.238
• 5.4.189
• 5.10.111
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.17.0
• 5.17.1
• 5.17.2
• 5.17.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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