219 lines
11 KiB
JSON
219 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98923",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.380Z",
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"datePublished": "2026-10-23T12:03:28.027Z",
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"dateUpdated": "2026-10-23T12:05:45.179Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-23T12:05:45.179Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: io: Reject non-user protection in ioremap_prot()\n\nMapping a stack-top page via /dev/mem with PROT_NONE and then\nreading that process's /proc/<pid>/cmdline triggers a spurious WARN\nin ioremap_prot() through generic_access_phys():\n\n WARNING: ./arch/arm64/include/asm/io.h:275 at generic_access_phys\n Call trace:\n generic_access_phys+0x1c8/0x228 (P)\n __access_remote_vm+0x2b4/0x398\n access_remote_vm+0x14/0x30\n get_mm_cmdline+0xf8/0x2a0\n proc_pid_cmdline_read+0x68/0x120\n\ngeneric_access_phys() passes the protection derived from the user PTE\nto ioremap_prot(). On arm64, a PROT_NONE mapping is represented by a\npresent-invalid PTE, so pte_present() still returns true and the\nprotection reaches ioremap_prot().\n\nA PROT_NONE mapping does not have PTE_USER, causing the existing\nWARN_ON_ONCE() in ioremap_prot() to fire even though this is a valid\nuser mapping. Execute-only mappings have the same issue and must not\nbe readable through this path either.\n\nioremap_prot() should therefore reject protection values without\nPTE_USER without warning. This makes the access fail cleanly for\nPROT_NONE and execute-only mappings while retaining the existing\nuser-protection contract."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/include/asm/io.h"
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],
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"versions": [
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{
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"version": "64858b76ec67c5fc40fef8ec1841fecb78c1ebde",
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"lessThan": "fddc90d4af4550af410f52d11bbf6b5f36443838",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "eeecafce5afffb4da703666ebefbd4d6e2a5abf6",
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"lessThan": "0b04af3d88bb7fc69b2d92457890608860e42365",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3d64dcc0799c2d6921ba027716b7be721eb19fa8",
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"lessThan": "b17aa4955e3a694c663ebe99626e4c76ca4f7cfb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f098037139b294050053123ab2bc0f819d08932",
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"lessThan": "9b583795feb51f8d50203228d001760d1344ef01",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f098037139b294050053123ab2bc0f819d08932",
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"lessThan": "bb756b11ad63832ebee58caf9e8f9381eaecff9f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.6.143",
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"lessThan": "6.6.158",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.93",
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"lessThan": "6.12.112",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.18.17",
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"lessThan": "6.18.55",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.19.7",
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"lessThan": "6.20",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/include/asm/io.h"
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],
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"versions": [
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{
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"version": "7.0",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "7.0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.55",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6.143",
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"versionEndExcluding": "6.6.158"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.93",
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"versionEndExcluding": "6.12.112"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18.17",
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"versionEndExcluding": "6.18.55"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.0",
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"versionEndExcluding": "7.2.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.0",
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"versionEndExcluding": "7.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.19.7"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fddc90d4af4550af410f52d11bbf6b5f36443838"
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},
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{
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"url": "https://git.kernel.org/stable/c/0b04af3d88bb7fc69b2d92457890608860e42365"
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},
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{
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"url": "https://git.kernel.org/stable/c/b17aa4955e3a694c663ebe99626e4c76ca4f7cfb"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b583795feb51f8d50203228d001760d1344ef01"
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},
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{
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"url": "https://git.kernel.org/stable/c/bb756b11ad63832ebee58caf9e8f9381eaecff9f"
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}
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],
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"title": "arm64: io: Reject non-user protection in ioremap_prot()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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} |