CVE-2026-31518: Linux vulnerability

CVE-2026-31518: esp: fix skb leak with espintcp and async crypto

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.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 15, 2026, 01:16 UTC (UTC+00:00)

Potential ATT&CK relevance

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CVE-2026-31518 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 22, 2026, 13:54 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

1ADP providers

12Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Mar 9, 2026, 15:48 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Apr 22, 2026, 13:54 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 15, 2026, 01:16 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224CVE reference, Linux
https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcdCVE reference, Linux
https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9CVE reference, Linux
https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4CVE reference, Linux
https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15CVE reference, Linux
https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818CVE reference, Linux
https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47CVE reference, Linux
https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2CVE reference, Linux
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlCVE reference, siemens-SADP

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxe27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, e27cca96cd68fa2c6814c90f9a1cfd36bb68c593unaffected

LinuxLinux5.6, 0, 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0affected

Weakness

CWE details

No CWE listed

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