CVE-2026-90143
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: net: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:17:07.097000
Last modified
2026-10-19 09:19:04.170000
View original CVE JSON
{
"id": "CVE-2026-90143",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:17:07.097",
"lastModified": "2026-10-19T09:19:04.170",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: kcm: Hold RCU read lock while running BPF parser\n\nkcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which\nprevents CPU migration, but does not establish an RCU read-side\ncritical section. Consequently, BPF map operations can trigger\nWARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser\nprogram.\n\nHold the RCU read lock while running the program."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"net/kcm/kcmsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "37108861cf7bd909d4a372069bcd61c8f489e232",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "3c70d27e792a28bca650ddd8a9aa0fe3591ffec5",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "1d26a6e007d46babc7fa76e5a157dccf86cd55c0",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "21526f8a191a3c50622b8c10bd927870d780eae4",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "292846223eaddba890e40699d2ab82ee5671798c",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "f392affef3c9ce64dfdde794df0579e0a7793440",
"versionType": "git",
"status": "affected"
},
{
"version": "9b73896a81dc68a638a011877b7344b252f92276",
"lessThan": "b0346dd64e4905291cc9c479f2e6cf1884ced4e6",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"net/kcm/kcmsock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.9",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.9",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/1d26a6e007d46babc7fa76e5a157dccf86cd55c0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/21526f8a191a3c50622b8c10bd927870d780eae4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/292846223eaddba890e40699d2ab82ee5671798c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/37108861cf7bd909d4a372069bcd61c8f489e232",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3c70d27e792a28bca650ddd8a9aa0fe3591ffec5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b0346dd64e4905291cc9c479f2e6cf1884ced4e6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f392affef3c9ce64dfdde794df0579e0a7793440",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}