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vuln-cve/data/2025/38xxx/CVE-2025-38591.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-38591",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T04:51:24.026Z",
"datePublished": "2025-08-19T17:03:12.508Z",
"dateUpdated": "2026-11-10T12:36:26.169Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-09-14T11:58:03.288Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject narrower access to pointer ctx fields\n\nThe following BPF program, simplified from a syzkaller repro, causes a\nkernel warning:\n\n r0 = *(u8 *)(r1 + 169);\n exit;\n\nWith pointer field sk being at offset 168 in __sk_buff. This access is\ndetected as a narrower read in bpf_skb_is_valid_access because it\ndoesn't match offsetof(struct __sk_buff, sk). It is therefore allowed\nand later proceeds to bpf_convert_ctx_access. Note that for the\n\"is_narrower_load\" case in the convert_ctx_accesses(), the insn->off\nis aligned, so the cnt may not be 0 because it matches the\noffsetof(struct __sk_buff, sk) in the bpf_convert_ctx_access. However,\nthe target_size stays 0 and the verifier errors with a kernel warning:\n\n verifier bug: error during ctx access conversion(1)\n\nThis patch fixes that to return a proper \"invalid bpf_context access\noff=X size=Y\" error on the load instruction.\n\nThe same issue affects multiple other fields in context structures that\nallow narrow access. Some other non-affected fields (for sk_msg,\nsk_lookup, and sockopt) were also changed to use bpf_ctx_range_ptr for\nconsistency.\n\nNote this syzkaller crash was reported in the \"Closes\" link below, which\nused to be about a different bug, fixed in\ncommit fce7bd8e385a (\"bpf/verifier: Handle BPF_LOAD_ACQ instructions\nin insn_def_regno()\"). Because syzbot somehow confused the two bugs,\nthe new crash and repro didn't get reported to the mailing list."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"kernel/bpf/cgroup.c",
"net/core/filter.c"
],
"versions": [
{
"version": "f96da09473b52c09125cc9bf7d7d4576ae8229e0",
"lessThan": "7847c4140e06f6e87229faae22cc38525334c156",
"status": "affected",
"versionType": "git"
},
{
"version": "f96da09473b52c09125cc9bf7d7d4576ae8229e0",
"lessThan": "feae34c992eb7191862fb1594c704fbbf650fef8",
"status": "affected",
"versionType": "git"
},
{
"version": "f96da09473b52c09125cc9bf7d7d4576ae8229e0",
"lessThan": "33660d44e789edb4f303210c813fc56d56377a90",
"status": "affected",
"versionType": "git"
},
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"status": "affected",
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{
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"lessThan": "058a0da4f6d916a79b693384111bb80a90d73763",
"status": "affected",
"versionType": "git"
},
{
"version": "f96da09473b52c09125cc9bf7d7d4576ae8229e0",
"lessThan": "202900ceeef67458c964c2af6e1427c8e533ea7c",
"status": "affected",
"versionType": "git"
},
{
"version": "f96da09473b52c09125cc9bf7d7d4576ae8229e0",
"lessThan": "e09299225d5ba3916c91ef70565f7d2187e4cca0",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"kernel/bpf/cgroup.c",
"net/core/filter.c"
],
"versions": [
{
"version": "4.13",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.13",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.249",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.199",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.162",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.67",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.16.1",
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.17",
"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": "4.13",
"versionEndExcluding": "5.10.249"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.13",
"versionEndExcluding": "5.15.199"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.16.1"
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{
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"references": [
{
"url": "https://git.kernel.org/stable/c/7847c4140e06f6e87229faae22cc38525334c156"
},
{
"url": "https://git.kernel.org/stable/c/feae34c992eb7191862fb1594c704fbbf650fef8"
},
{
"url": "https://git.kernel.org/stable/c/33660d44e789edb4f303210c813fc56d56377a90"
},
{
"url": "https://git.kernel.org/stable/c/e2e9599f3503df7cf3569d2b6c50d5488fb59435"
},
{
"url": "https://git.kernel.org/stable/c/058a0da4f6d916a79b693384111bb80a90d73763"
},
{
"url": "https://git.kernel.org/stable/c/202900ceeef67458c964c2af6e1427c8e533ea7c"
},
{
"url": "https://git.kernel.org/stable/c/e09299225d5ba3916c91ef70565f7d2187e4cca0"
}
],
"title": "bpf: Reject narrower access to pointer ctx fields",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-38591",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-10T20:41:20.077651Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-11T18:44:11.247Z"
}
},
{
"x_adpType": "supplier",
"providerMetadata": {
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"dateUpdated": "2026-11-10T12:36:26.169Z"
},
"affected": [
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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}
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