rxrpc: Fix the ACK parser to extract the SACK table for parsing
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the ACK parser to extract the SACK table for parsing Fix modification of the received skbuff in rxrpc_input_soft_acks() and a potential incorrect access of the buffer in a fragmented UDP packet (the packet would probably have to be deliberately pre-generated as fragmented) when AF_RXRPC tries to extract the contents of the SACK table by copying out the contents of the SACK table into a buffer before attempting to parse AF_RXRPC assumes that it can just call skb_condense() and then validly access the SACK table from skb->data and that it will be a flat buffer - but skb_condense() can silently fail to do anything under some circumstances. Note that whilst rxrpc_input_soft_acks() should be able to parse extended ACKs, the rest of AF_RXRPC doesn't currently support that. Further, there's then no need to call skb_condense() in rxrpc_input_ack(), so don't.
CVE-2026-53151
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-2026-53151
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": "d57a3a151660902091491ac2633134e1be92557f",
"lessThan": "5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1",
"versionType": "git"
},
{
"status": "affected",
"version": "d57a3a151660902091491ac2633134e1be92557f",
"lessThan": "775c5e89272a2615b72bb84f611ba66fa3b7493e",
"versionType": "git"
},
{
"status": "affected",
"version": "d57a3a151660902091491ac2633134e1be92557f",
"lessThan": "566c4c1244de50fbff1f89ff93c9d7b0fc256db4",
"versionType": "git"
},
{
"status": "affected",
"version": "d57a3a151660902091491ac2633134e1be92557f",
"lessThan": "224298450be5c04d2a6ea1c2a94669d7ebf65d00",
"versionType": "git"
},
{
"status": "affected",
"version": "d57a3a151660902091491ac2633134e1be92557f",
"lessThan": "333b6d5bb9f87827ac2639c737bf9613dbae7253",
"versionType": "git"
}
],
"programFiles": [
"net/rxrpc/input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/rxrpc/input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53151
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40761 · Revision 1
- Added to Heist Feed
- Publisher date