CVE-2026-31518 (GCVE-0-2026-31518)
Vulnerability from cvelistv5
Published
2026-04-22 13:54
Modified
2026-04-22 13:54
Severity ?
VLAI Severity ?
EPSS score ?
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
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 Version: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 |
||
{
"containers": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/ipv4/esp4.c",
"net/ipv6/esp6.c"
],
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{
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],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"lessThan": "5.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.131",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.80",
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},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.21",
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},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.11",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
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],
"negate": false,
"operator": "OR"
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]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nesp: fix skb leak with espintcp and async crypto\n\nWhen the TX queue for espintcp is full, esp_output_tail_tcp will\nreturn an error and not free the skb, because with synchronous crypto,\nthe common xfrm output code will drop the packet for us.\n\nWith async crypto (esp_output_done), we need to drop the skb when\nesp_output_tail_tcp returns an error."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-22T13:54:34.191Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/aca3ad0c262f54a5b5c95dda80a48365997d1224"
},
{
"url": "https://git.kernel.org/stable/c/41aafca57de4a4c026701622bd4648f112a9edcd"
},
{
"url": "https://git.kernel.org/stable/c/4820847e036ff1035b01b69ad68dfc17e7028fe9"
},
{
"url": "https://git.kernel.org/stable/c/6a3ec6efbc4f90e0ccb2e71574f07351f19996f4"
},
{
"url": "https://git.kernel.org/stable/c/df6f995358dc1f3c42484f5cfe241d7bd3e1cd15"
},
{
"url": "https://git.kernel.org/stable/c/88d386243ed374ac969dabd3bbc1409a31d81818"
},
{
"url": "https://git.kernel.org/stable/c/6aa9841d917532d0f2d932d1ff2f3a94305aaf47"
},
{
"url": "https://git.kernel.org/stable/c/0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2"
}
],
"title": "esp: fix skb leak with espintcp and async crypto",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31518",
"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"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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