net: ioam6: fix OOB and missing lock
In the Linux kernel, the following vulnerability has been resolved: net: ioam6: fix OOB and missing lock When trace->type.bit6 is set: if (trace->type.bit6) { ... queue = skb_get_tx_queue(dev, skb); qdisc = rcu_dereference(queue->qdisc); This code can lead to an out-of-bounds access of the dev->_tx[] array when is_input is true. In such a case, the packet is on the RX path and skb->queue_mapping contains the RX queue index of the ingress device. If the ingress device has more RX queues than the egress device (dev) has TX queues, skb_get_queue_mapping(skb) will exceed dev->num_tx_queues. Add a check to avoid this situation since skb_get_tx_queue() does not clamp the index. This issue has also revealed that per queue visibility cannot be accurate and will be replaced later as a new feature. While at it, add missing lock around qdisc_qstats_qlen_backlog(). The function __ioam6_fill_trace_data() is called from both softirq and process contexts, hence the use of spin_lock_bh() here.
CVE-2026-43083
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-2026-43083
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": "b63c5478e9cb1d1504eb02d9dac827ad24612b32",
"lessThan": "a05a85779c2574b6534abb8cdc6d65fbc2e91208",
"versionType": "git"
},
{
"status": "affected",
"version": "b63c5478e9cb1d1504eb02d9dac827ad24612b32",
"lessThan": "f1af9d19503b73011dae5051c354fd39b03e240d",
"versionType": "git"
},
{
"status": "affected",
"version": "b63c5478e9cb1d1504eb02d9dac827ad24612b32",
"lessThan": "6d1d9ed9b409e0662241e3d245d574a18f643494",
"versionType": "git"
},
{
"status": "affected",
"version": "b63c5478e9cb1d1504eb02d9dac827ad24612b32",
"lessThan": "95a1334748c95dd15546056280ade0c4b8dd7b78",
"versionType": "git"
},
{
"status": "affected",
"version": "b63c5478e9cb1d1504eb02d9dac827ad24612b32",
"lessThan": "b30b1675aa2bcf0491fd3830b051df4e08a7c8ca",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/ioam6.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"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": "6.18.24",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/ioam6.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43083
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #46257 · Revision 1
- Added to Heist Feed
- Publisher date