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vuln-cve/data/2026/72xxx/CVE-2026-72028.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-72028",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-09T03:40:39.901Z",
"datePublished": "2026-08-15T05:51:51.868Z",
"dateUpdated": "2026-10-30T12:28:45.873Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-30T12:28:45.873Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: probes: save original sp in rethook trampoline\n\nReading a word from the stack in a kretprobe crashes a risc-v kernel.\n\n$ cd /sys/kernel/tracing/\n$ echo 'r n_tty_write $stack0' > dynamic_events\n$ echo 1 > events/kprobes/enable\nUnable to handle kernel paging request at virtual address 0000000200000128\n...\n[<ffffffff80016d16>] regs_get_kernel_stack_nth+0x26/0x38\n[<ffffffff80177196>] process_fetch_insn+0x3ee/0x760\n[<ffffffff80177836>] kretprobe_trace_func+0x116/0x1f0\n[<ffffffff8017795a>] kretprobe_dispatcher+0x4a/0x58\n[<ffffffff8013572e>] kretprobe_rethook_handler+0x5e/0x90\n[<ffffffff80180838>] rethook_trampoline_handler+0x70/0x108\n[<ffffffff8001ba32>] arch_rethook_trampoline_callback+0x12/0x1c\n[<ffffffff8001ba84>] arch_rethook_trampoline+0x48/0x94\n[<ffffffff8067872a>] tty_write+0x1a/0x30\n\nIn regs_get_kernel_stack_nth, regs->sp contains an arbitrary value.\n\narch_rethook_trampoline saves the registers from the probed function in a\nstruct pt_regs. sp is not saved. Instead, sp is decremented for\narch_rethook_trampoline's local stack.\n\nFix this crash and save the original sp along with the other registers.\nUse a0 as a temporary register, it is overwritten anyway.\n\n[pjw@kernel.org: added Fixes tag; cc'ed stable]"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"arch/riscv/kernel/probes/rethook_trampoline.S"
],
"versions": [
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "d21109fe4a55247094f913773a334772907cd016",
"status": "affected",
"versionType": "git"
},
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "5da5cf48a432e30ded8d58087854e5383a36eff1",
"status": "affected",
"versionType": "git"
},
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "c386e1c591d72eab58ee2e69105c8cbc70928857",
"status": "affected",
"versionType": "git"
},
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "2faf0198168d2017cb528a79f76c560fda3b6e94",
"status": "affected",
"versionType": "git"
},
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "91b4d76dd07f1a1f20f73dfebb42ba04ac911a56",
"status": "affected",
"versionType": "git"
},
{
"version": "c22b0bcb1dd024cb9caad9230e3a387d8b061df5",
"lessThan": "bc7b086a45521a986a49045907f017e3e46c763e",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"arch/riscv/kernel/probes/rethook_trampoline.S"
],
"versions": [
{
"version": "5.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.145",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.97",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2",
"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": "5.12",
"versionEndExcluding": "6.1.191"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12",
"versionEndExcluding": "6.6.145"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12",
"versionEndExcluding": "6.12.97"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12",
"versionEndExcluding": "6.18.40"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12",
"versionEndExcluding": "7.1.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.12",
"versionEndExcluding": "7.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/d21109fe4a55247094f913773a334772907cd016"
},
{
"url": "https://git.kernel.org/stable/c/5da5cf48a432e30ded8d58087854e5383a36eff1"
},
{
"url": "https://git.kernel.org/stable/c/c386e1c591d72eab58ee2e69105c8cbc70928857"
},
{
"url": "https://git.kernel.org/stable/c/2faf0198168d2017cb528a79f76c560fda3b6e94"
},
{
"url": "https://git.kernel.org/stable/c/91b4d76dd07f1a1f20f73dfebb42ba04ac911a56"
},
{
"url": "https://git.kernel.org/stable/c/bc7b086a45521a986a49045907f017e3e46c763e"
}
],
"title": "riscv: probes: save original sp in rethook trampoline",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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