{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43083","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.983Z","datePublished":"2026-05-06T07:40:18.504Z","dateUpdated":"2026-05-11T22:17:23.786Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:17:23.786Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ioam6: fix OOB and missing lock\n\nWhen trace->type.bit6 is set:\n\n    if (trace->type.bit6) {\n        ...\n        queue = skb_get_tx_queue(dev, skb);\n        qdisc = rcu_dereference(queue->qdisc);\n\nThis code can lead to an out-of-bounds access of the dev->_tx[] array\nwhen is_input is true. In such a case, the packet is on the RX path and\nskb->queue_mapping contains the RX queue index of the ingress device. If\nthe ingress device has more RX queues than the egress device (dev) has\nTX queues, skb_get_queue_mapping(skb) will exceed dev->num_tx_queues.\nAdd a check to avoid this situation since skb_get_tx_queue() does not\nclamp the index. This issue has also revealed that per queue visibility\ncannot be accurate and will be replaced later as a new feature.\n\nWhile at it, add missing lock around qdisc_qstats_qlen_backlog(). The\nfunction __ioam6_fill_trace_data() is called from both softirq and\nprocess contexts, hence the use of spin_lock_bh() here."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ioam6.c"],"versions":[{"version":"b63c5478e9cb1d1504eb02d9dac827ad24612b32","lessThan":"6d1d9ed9b409e0662241e3d245d574a18f643494","status":"affected","versionType":"git"},{"version":"b63c5478e9cb1d1504eb02d9dac827ad24612b32","lessThan":"95a1334748c95dd15546056280ade0c4b8dd7b78","status":"affected","versionType":"git"},{"version":"b63c5478e9cb1d1504eb02d9dac827ad24612b32","lessThan":"b30b1675aa2bcf0491fd3830b051df4e08a7c8ca","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ioam6.c"],"versions":[{"version":"5.17","status":"affected"},{"version":"0","lessThan":"5.17","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6d1d9ed9b409e0662241e3d245d574a18f643494"},{"url":"https://git.kernel.org/stable/c/95a1334748c95dd15546056280ade0c4b8dd7b78"},{"url":"https://git.kernel.org/stable/c/b30b1675aa2bcf0491fd3830b051df4e08a7c8ca"}],"title":"net: ioam6: fix OOB and missing lock","x_generator":{"engine":"bippy-1.2.0"}}}}