io_uring/net: don't overconsume buffers when using MSG_TRUNC
In the Linux kernel, the following vulnerability has been resolved: io_uring/net: don't overconsume buffers when using MSG_TRUNC When a recv/recvmsg is issued with MSG_TRUNC and the incoming packet is larger than the provided buffer, the net layer returns the full length of the packet rather than the number of bytes actually copied into the buffer. As a result, io_uring advances more of the provided buffer ring than was actually filled. Use the actual filled region size to consume the buffer, but still return the full size to preserve MSG_TRUNC semantics. Take care with multishot, because that seems to already truncate the consumption based on the available payload size. This was reported in https://github.com/axboe/liburing/issues/1619. [axboe: fold in size_t unsigned fix]
CVE-2026-97618
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-97618
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
"lessThan": "41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1",
"versionType": "git"
},
{
"status": "affected",
"version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
"lessThan": "927d96f91c582b319d104ecf50ec935a8dc29193",
"versionType": "git"
},
{
"status": "affected",
"version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
"lessThan": "2e70ea75c7bb38a6dc212975f887310f14f7c043",
"versionType": "git"
},
{
"status": "affected",
"version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
"lessThan": "6028b543884f8735e057ec9eea4908cd61cab230",
"versionType": "git"
}
],
"programFiles": [
"io_uring/net.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/net.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97618
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38055 · Revision 1
- Added to Heist Feed
- Publisher date