Vulnerability-Lookup

FKIE_CVE-2026-31518

Vulnerability from fkie_nvd - Published: 2026-04-22 14:16 - Updated: 2026-04-28 17:25

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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    }
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CVE-2026-31518 (GCVE-0-2026-31518)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54

Title

esp: fix skb leak with espintcp and async crypto

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/aca3ad0c262f54a5b…
	https://git.kernel.org/stable/c/41aafca57de4a4c02…
	https://git.kernel.org/stable/c/4820847e036ff1035…
	https://git.kernel.org/stable/c/6a3ec6efbc4f90e0c…
	https://git.kernel.org/stable/c/df6f995358dc1f3c4…
	https://git.kernel.org/stable/c/88d386243ed374ac9…
	https://git.kernel.org/stable/c/6aa9841d917532d0f…
	https://git.kernel.org/stable/c/0c0eef8ccd2413b0a…

Impacted products

Vendor

Product

Version

Linux

Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < aca3ad0c262f54a5b5c95dda80a48365997d1224 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 41aafca57de4a4c026701622bd4648f112a9edcd (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 4820847e036ff1035b01b69ad68dfc17e7028fe9 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 6a3ec6efbc4f90e0ccb2e71574f07351f19996f4 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < df6f995358dc1f3c42484f5cfe241d7bd3e1cd15 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 88d386243ed374ac969dabd3bbc1409a31d81818 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 6aa9841d917532d0f2d932d1ff2f3a94305aaf47 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2 (git)

Linux

Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/esp4.c",
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      "title": "esp: fix skb leak with espintcp and async crypto",
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    "datePublished": "2026-04-22T13:54:34.191Z",
    "dateReserved": "2026-03-09T15:48:24.108Z",
    "dateUpdated": "2026-04-22T13:54:34.191Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-31518

CVE-2026-31518 (GCVE-0-2026-31518)

Tags

Sightings

Nomenclature