CVE-2026-72326
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: cake: reject overhead values that underflow length CAKE accepts signed overhead values and stores them in an s16, but the adjusted packet length calculation uses unsigned arithmetic. A negative effective length can therefore wrap to a large value. Such configurations make rate accounting depend on integer wraparound rather than on the packet size userspace intended to model. A static netlink lower bound is not enough because packets reaching CAKE can be smaller than any reasonable manual-overhead allowance. Fold the signed overhead adjustment into the existing datapath MPU clamp so negative adjusted lengths are clamped before link-layer framing adjustments.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-08-15 06:22:05.660000
Last modified
2026-11-06 17:19:43.173000
View original CVE JSON
{
"id": "CVE-2026-72326",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-08-15T06:22:05.660",
"lastModified": "2026-11-06T17:19:43.173",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cake: reject overhead values that underflow length\n\nCAKE accepts signed overhead values and stores them in an s16, but the\nadjusted packet length calculation uses unsigned arithmetic. A negative\neffective length can therefore wrap to a large value.\n\nSuch configurations make rate accounting depend on integer wraparound\nrather than on the packet size userspace intended to model. A static\nnetlink lower bound is not enough because packets reaching CAKE can be\nsmaller than any reasonable manual-overhead allowance.\n\nFold the signed overhead adjustment into the existing datapath MPU clamp\nso negative adjusted lengths are clamped before link-layer framing\nadjustments."
}
],
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{
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"metrics": {
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"id": "CVE-2026-72326",
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