net: team: stop reusing skb after queue override
In the Linux kernel, the following vulnerability has been resolved: net: team: stop reusing skb after queue override A nonzero dev_queue_xmit() result does not return ownership of the skb. When an override port's qdisc drops it, the queue override helper used to try another port or the mode transmit op with the freed skb. Return the handoff decision separately from transmit success. Select only the first override port under RCU and stop after handing it the skb, regardless of the lower transmit result. Keep the existing success and drop accounting. BUG: KASAN: slab-use-after-free in sk_skb_reason_drop Write of size 4 by task poc/5040 sk_skb_reason_drop (net/core/skbuff.c:1240) dev_kfree_skb_any_reason (net/core/dev.c:3470) ab_transmit (drivers/net/team/team_mode_activebackup.c:49) team_xmit (drivers/net/team/team_core.c:1849) __dev_direct_xmit (net/core/dev.c:4934) Freed by task 5040: __tcf_kfree_skb_list (net/sched/sch_generic.c:43) __dev_queue_xmit (net/core/dev.c:4831) team_xmit (drivers/net/team/team_core.c:1846) Kernel panic - not syncing: KASAN: panic_on_warn set ...
CVE-2026-99027
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-2026-99027
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": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
"lessThan": "b21f20320fa2f3c683e3334d70de6bfd172e544a",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
"lessThan": "07a48cfceb3d0555710a9acb87c949500a7b4523",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
"lessThan": "0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
"lessThan": "bed63353341d2d44cbad034001dd382cfe3a3892",
"versionType": "git"
},
{
"status": "affected",
"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a",
"lessThan": "b7454f1940c5e6d92e753853c476a769e452f30a",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/team/team_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/team/team_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99027
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52862 · Revision 1
- Added to Heist Feed
- Publisher date