199 lines
11 KiB
JSON
199 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-2022-50168",
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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": "2025-06-18T10:57:27.426Z",
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"datePublished": "2025-06-18T11:03:21.593Z",
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"dateUpdated": "2026-10-15T21:31:18.723Z"
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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": "2026-08-05T08:57:37.473Z"
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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, x86: fix freeing of not-finalized bpf_prog_pack\n\nsyzbot reported a few issues with bpf_prog_pack [1], [2]. This only happens\nwith multiple subprogs. In jit_subprogs(), we first call bpf_int_jit_compile()\non each sub program. And then, we call it on each sub program again. jit_data\nis not freed in the first call of bpf_int_jit_compile(). Similarly we don't\ncall bpf_jit_binary_pack_finalize() in the first call of bpf_int_jit_compile().\n\nIf bpf_int_jit_compile() failed for one sub program, we will call\nbpf_jit_binary_pack_finalize() for this sub program. However, we don't have a\nchance to call it for other sub programs. Then we will hit \"goto out_free\" in\njit_subprogs(), and call bpf_jit_free on some subprograms that haven't got\nbpf_jit_binary_pack_finalize() yet.\n\nAt this point, bpf_jit_binary_pack_free() is called and the whole 2MB page is\nfreed erroneously.\n\nFix this with a custom bpf_jit_free() for x86_64, which calls\nbpf_jit_binary_pack_finalize() if necessary. Also, with custom\nbpf_jit_free(), bpf_prog_aux->use_bpf_prog_pack is not needed any more,\nremove it.\n\n[1] https://syzkaller.appspot.com/bug?extid=2f649ec6d2eea1495a8f\n[2] https://syzkaller.appspot.com/bug?extid=87f65c75f4a72db05445"
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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 bug is reached only through the local bpf() syscall (BPF_PROG_LOAD → bpf_check → jit_subprogs → bpf_jit_free) while JIT-compiling a multi-subprog eBPF program on x86_64; BPF is a local syscall path, not a network or adjacent-protocol entry.\nAC:L - The attacker fully controls program shape and can force the multi-subprog JIT failure path (failed second pass / alloc failure after earlier subprogs succeeded), as syzbot did repeatedly; no race or attacker-uncontrollable layout is required.\nPR:L - Multi-subprog programs require bpf_capable() (CAP_BPF or CAP_SYS_ADMIN), but CAP_BPF is a delegatable non-root capability routinely granted to containers, agents, and Android services, so only low privileges are needed in the worst reasonable deployment.\nUI:N - The attacker loads the crafted multi-subprog BPF program themselves via bpf(); no separate victim action is required.\nS:U - Impact is host-kernel memory corruption / privilege escalation within the same OS security authority; this is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - Freeing a not-finalized bpf_prog_pack slice via the wrong path can release the shared 2MB JIT pack while other programs still use it (explicit UAF of pack contents), enabling reclaim and arbitrary kernel/JIT memory disclosure.\nI:H - The same erroneous pack free / module_memfree of shared RX JIT memory is a use-after-free of executable BPF images and allocator state, sprayable into arbitrary write and control-flow hijack primitives.\nA:H - syzbot observed KASAN vmalloc-OOB in bpf_jit_free escalating to a page-fault oops, and a kernel BUG in __text_poke when later JIT touches corrupted pack memory, so availability impact is High."
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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/x86/net/bpf_jit_comp.c",
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"include/linux/bpf.h",
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"include/linux/filter.h",
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"kernel/bpf/core.c"
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],
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"versions": [
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{
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"version": "1022a5498f6f745c3b5fd3f050a5e11e7ca354f0",
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"lessThan": "f91ce608a79c0db3e72bd63c23e011a9ebc31505",
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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": "1022a5498f6f745c3b5fd3f050a5e11e7ca354f0",
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"lessThan": "60e66074812dde9cde3d99cdd3caa9e40f1a4516",
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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": "1022a5498f6f745c3b5fd3f050a5e11e7ca354f0",
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"lessThan": "1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d",
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"status": "affected",
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"versionType": "git"
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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/x86/net/bpf_jit_comp.c",
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"include/linux/bpf.h",
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"include/linux/filter.h",
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"kernel/bpf/core.c"
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],
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"versions": [
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{
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"version": "5.18",
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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": "5.18",
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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": "5.18.18",
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"lessThanOrEqual": "5.18.*",
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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": "5.19.2",
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"lessThanOrEqual": "5.19.*",
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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": "6.0",
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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": "5.18",
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"versionEndExcluding": "5.18.18"
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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": "5.18",
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"versionEndExcluding": "5.19.2"
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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": "5.18",
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"versionEndExcluding": "6.0"
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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/f91ce608a79c0db3e72bd63c23e011a9ebc31505"
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},
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{
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"url": "https://git.kernel.org/stable/c/60e66074812dde9cde3d99cdd3caa9e40f1a4516"
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},
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{
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"url": "https://git.kernel.org/stable/c/1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d"
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}
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],
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"title": "bpf, x86: fix freeing of not-finalized bpf_prog_pack",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-50168",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:30:21.051809Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T21:31:18.723Z"
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}
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}
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]
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}
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} |