net: skbuff: don't touch shared zerocopy state in skb_tx_error()
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't touch shared zerocopy state in skb_tx_error() skb_tx_error() completes the zerocopy uarg and clears SKBFL_ALL_ZEROCOPY, and skb_zcopy_downgrade_managed() clears SKBFL_MANAGED_FRAG_REFS. Both live in skb_shinfo(), which every clone shares, while the caller only owns the reference it is about to drop. Through a clone it tells the producer its pages are free and drops SKBFL_SHARED_FRAG for an skb that is still in flight. Open vSwitch reaches this with a non-last OVS_ACTION_ATTR_RECIRC: clone_execute() sends a skb_clone() into ovs_dp_process_packet() while do_execute_actions() keeps forwarding the original, and skb_clone() does not privatise the frags here -- skb_orphan_frags() returns early on SKBFL_DONT_ORPHAN. A flow miss on the clone then strips the marker from the packet still being forwarded, and a later local ESP delivery decrypts in place over frags it does not own privately. Skip it for a cloned skb. Nothing is lost: skb_release_data() clears the zerocopy state once the last reference to the shared data goes.
CVE-2026-80977
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-2026-80977
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": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "6493165034bca14033bf49c9cec7b45e97a91497",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "b4452349dcf4d561e13be768d5d278de58248930",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "363c4252ffc473a0203e91b83ede5519dfb8bd07",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "6ec22afc82a3cae07ade0a6ec361ae2532128ff5",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "15aa81b390d401abf4b8211042470e9e92e3b7fb",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "288f9970670841044ab030104fa6b6ed159949d0",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "0370da114a9bc044e248b85c6809d1b5e0c1f7f9",
"versionType": "git"
},
{
"status": "affected",
"version": "25121173f7b1e4ac3fc692df6e7b8c52ec36abba",
"lessThan": "f66bdb1cc0fcd227a062378f8be0b5873aa5600a",
"versionType": "git"
}
],
"programFiles": [
"net/core/skbuff.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/skbuff.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80977
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34935 · Revision 1
- Added to Heist Feed
- Publisher date