241 lines
12 KiB
JSON
241 lines
12 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-2024-42067",
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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": "2024-07-29T15:50:41.168Z",
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"datePublished": "2024-07-29T15:52:31.825Z",
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"dateUpdated": "2026-10-21T12:34:57.072Z"
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},
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"containers": {
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-10-21T12:34:57.072Z"
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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\nbpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()\n\nset_memory_rox() can fail, leaving memory unprotected.\n\nCheck return and bail out when bpf_jit_binary_lock_ro() returns\nan error."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The JIT is driven only from local syscalls — `setsockopt(SO_ATTACH_FILTER)`, `seccomp(SECCOMP_SET_MODE_FILTER)`, or `bpf()` — all requiring local access to the machine. No remote peer can cause a BPF program to be JIT-compiled.\nAC:L - The precondition is a page-table allocation failure inside `set_memory_rox()`, and memory pressure is something a local attacker directly influences by ballooning allocations while spraying thousands of concurrent filter attachments. Both sides of the condition are under attacker control, so this is not a state beyond their influence.\nPR:L - A completely unprivileged user reaches `bpf_int_jit_compile()` through `sk_attach_filter()` on any socket or through `seccomp()` under NO_NEW_PRIVS — no CAP_BPF, no CAP_NET_ADMIN, and no user namespace required. Only a basic local account is needed.\nUI:N - The attacker attaches the filter and triggers execution entirely from their own process. No victim action, mount, or file open is involved.\nS:U - The unprotected memory and the resulting crash or code injection are all within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - A failed lock leaves a writable, executable kernel page containing attacker-influenced JIT output, which is a direct kernel code-injection primitive when paired with any write; injected code yields arbitrary kernel memory disclosure. The loss of the read-only guarantee on executable memory is a full compromise of confidentiality in the worst case.\nI:H - On arm32 the JIT buffer stays RWX with attacker-chosen immediates embedded in it — precisely the JIT-spray/control-flow-hijack scenario that `bpf_jit_binary_lock_ro()` exists to prevent, permitting arbitrary kernel code execution. Kernel executable memory silently remaining writable is an integrity failure of the highest order.\nA:H - On s390 and x86-32 the buffer is allocated NX and only becomes executable via `set_memory_rox()`; on failure the JIT still sets `bpf_func`/`jited = 1`, so the first run of the filter faults on an instruction fetch from a non-executable page and oopses the kernel. An unprivileged user can repeat this to panic the system."
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}
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]
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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/arm/net/bpf_jit_32.c",
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"arch/loongarch/net/bpf_jit.c",
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"arch/mips/net/bpf_jit_comp.c",
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"arch/parisc/net/bpf_jit_core.c",
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"arch/s390/net/bpf_jit_comp.c",
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"arch/sparc/net/bpf_jit_comp_64.c",
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"arch/x86/net/bpf_jit_comp32.c",
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"include/linux/filter.h"
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],
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"versions": [
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{
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"lessThan": "c20d0fa873039bce82d4b1b2ffcda8bb22242790",
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"status": "affected",
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"versionType": "git"
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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/arm/net/bpf_jit_32.c",
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"arch/loongarch/net/bpf_jit.c",
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"arch/mips/net/bpf_jit_comp.c",
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"arch/parisc/net/bpf_jit_core.c",
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"arch/s390/net/bpf_jit_comp.c",
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"arch/sparc/net/bpf_jit_comp_64.c",
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"arch/x86/net/bpf_jit_comp32.c",
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"include/linux/filter.h"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.9.8",
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"lessThanOrEqual": "6.9.*",
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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": "6.10",
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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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