net/sched: ets: fix divide by zero in the offload path
In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: fix divide by zero in the offload path Offloading ETS requires computing each class' WRR weight: this is done by averaging over the sums of quanta as 'q_sum' and 'q_psum'. Using unsigned int, the same integer size as the individual DRR quanta, can overflow and even cause division by zero, like it happened in the following splat: Oops: divide error: 0000 [#1] SMP PTI CPU: 13 UID: 0 PID: 487 Comm: tc Tainted: G E 6.19.0-virtme #45 PREEMPT(full) Tainted: [E]=UNSIGNED_MODULE Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 RIP: 0010:ets_offload_change+0x11f/0x290 [sch_ets] Code: e4 45 31 ff eb 03 41 89 c7 41 89 cb 89 ce 83 f9 0f 0f 87 b7 00 00 00 45 8b 08 31 c0 45 01 cc 45 85 c9 74 09 41 6b c4 64 31 d2 <41> f7 f2 89 c2 44 29 fa 45 89 df 41 83 fb 0f 0f 87 c7 00 00 00 44 RSP: 0018:ffffd0a180d77588 EFLAGS: 00010246 RAX: 00000000ffffff38 RBX: ffff8d3d482ca000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffd0a180d77660 RBP: ffffd0a180d77690 R08: ffff8d3d482ca2d8 R09: 00000000fffffffe R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffffe R13: ffff8d3d472f2000 R14: 0000000000000003 R15: 0000000000000000 FS: 00007f440b6c2740(0000) GS:ffff8d3dc9803000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000003cdd2000 CR3: 0000000007b58002 CR4: 0000000000172ef0 Call Trace: ets_qdisc_change+0x870/0xf40 [sch_ets] qdisc_create+0x12b/0x54
CVE-2026-23379
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-2026-23379
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": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "62015c05878eb9ca448dca7f5a74423d10d40789",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "a11ec75a029b3a22b5596f98ce91a3be76a86213",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "3912871344d6a0f1f572a7af2716968182d1e536",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "7dbffffd5761687e168fb2f4aaa7a2c47e067efc",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "78b8d2f55a564236435649fbd8bd6a103f30acf5",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "a6677e23b313cd9fd03690c589c6452cb6fffb97",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "abe1d5cb7fe135c0862c58db32bc29e04cf1c906",
"versionType": "git"
},
{
"status": "affected",
"version": "d35eb52bd2ac7557b62bda52668f2e64dde2cf90",
"lessThan": "e35626f610f3d2b7953ccddf6a77453da22b3a9e",
"versionType": "git"
}
],
"programFiles": [
"net/sched/sch_ets.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.77",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.17",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.7",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sched/sch_ets.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23379
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27242 · Revision 1
- Added to Heist Feed
- Publisher date