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CVE-2026-45890

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect() function in the backend only validates the upper bound (requested_num_queues > xenvif_max_queues) but not zero, allowing requested_num_queues=0 to reach vzalloc(array_size(0, sizeof(struct xenvif_queue))), which triggers WARN_ON_ONCE(!size) in __vmalloc_node_range(). On
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:973a9f47ec011a45582ce039c5d84f3004ba12b5af17bd060fa1c187d2241b61
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/xen-netback/xenbus.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2993e0f904c45f8af12917344bb1cac7ccd05a60","status":"affected","version":"8d3d53b3e43363e79ab9a9ecc149b06c1314b25d","versionType":"git"},{"lessThan":"787bfa423228c4b02ba3368128f625d579085353","status":"affected","version":"8d3d53b3e43363e79ab9a9ecc149b06c1314b25d","versionType":"git"},{"lessThan":"ce66d6786de45b7ed9cbbdc0988054bf09e58f54","status":"affected","version":"8d3d53b3e4336…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/xen-netback/xenbus.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.16"},{"lessThan":"3.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/xen-netback/xenbus.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2993e0f904c45f8af12917344bb1cac7ccd05a60","status":"affected","version":"8d3d53b3e43363e79ab9a9ecc149b06c1314b25d","versionType":"git"},{"lessThan":"787bfa423228c4b02ba3368128f625d579085353","status":"affected","version":"8d3d53b3e43363e79ab9a9ecc149b06c1314b25d","versionType":"git"},{"lessThan":"ce66d6786de45b7ed9cbbdc0988054bf09e58f54","status":"affected","version":"8d3d53b3e4336…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/xen-netback/xenbus.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.16"},{"lessThan":"3.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/affected/1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/2993e0f904c45f8af12917344bb1cac7ccd05a60"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/654780dee9eae419e1648ea58462c4efe54518fa"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/6d1dc8014334c7fb25719999bca84d811e60a559"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/787bfa423228c4b02ba3368128f625d579085353"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/88b0fced1bbbfdb356a007592604008ffc93a6a1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/ce66d6786de45b7ed9cbbdc0988054bf09e58f54"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/d99f69ddc70fd9f4b8148add62209a1a8eb5c615"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/ec4859ac5c933e3315543a61adc1ca4358006a41"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:52c3cc4ec88f94e5cd03c854a0d90f53ee488edbed4ff60ade8e8050db797b10 · sha256:4cd4854daf466d29… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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