Linux Kernel up to 6.19.10 esp esp_output_tail_tcp privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.19.10. The impacted element is the function esp_output_tail_tcp of the component esp. Executing a manipulation can lead to an unknown weakness. This vulnerability appears as CVE-2026-31518. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.19.10. This vulnerability affects the function esp_output_tail_tcp of the component esp. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: esp: fix skb leak with espintcp and async crypto When the TX queue for espintcp is full, esp_output_tail_tcp will return an error and not free the skb, because with synchronous crypto, the common xfrm output code will drop the packet for us. With async crypto (esp_output_done), we need to drop the skb when esp_output_tail_tcp returns an error.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-31518 since 03/09/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318288 (Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21 or 6.19.11 eliminates this vulnerability. Applying the patch aca3ad0c262f54a5b5c95dda80a48365997d1224/41aafca57de4a4c026701622bd4648f112a9edcd/4820847e036ff1035b01b69ad68dfc17e7028fe9/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15/88d386243ed374ac969dabd3bbc1409a31d81818/6aa9841d917532d0f2d932d1ff2f3a94305aaf47/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2 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 (318288) and CERT Bund (WID-SEC-2026-1252). Once again VulDB remains the best source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318288
Nessus Name: Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.131/6.12.80/6.18.21/6.19.11
Patch: aca3ad0c262f54a5b5c95dda80a48365997d1224/41aafca57de4a4c026701622bd4648f112a9edcd/4820847e036ff1035b01b69ad68dfc17e7028fe9/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15/88d386243ed374ac969dabd3bbc1409a31d81818/6aa9841d917532d0f2d932d1ff2f3a94305aaf47/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2

Timelineinfo

03/09/2026 CVE reserved
04/22/2026 +43 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
06/18/2026 +57 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31518 (🔒)
GCVE (CVE): GCVE-0-2026-31518
GCVE (VulDB): GCVE-100-358948
CERT Bund: WID-SEC-2026-1252 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 17:24
Updated: 06/18/2026 08:59
Changes: 04/22/2026 17:24 (59), 06/03/2026 19:28 (2), 06/18/2026 08:59 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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