256 lines
14 KiB
JSON
256 lines
14 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-2025-37822",
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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": "2025-04-16T04:51:23.947Z",
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"datePublished": "2025-05-08T06:26:16.209Z",
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"dateUpdated": "2026-10-15T21:52:01.328Z"
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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": "2026-08-05T11:57:45.691Z"
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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\nriscv: uprobes: Add missing fence.i after building the XOL buffer\n\nThe XOL (execute out-of-line) buffer is used to single-step the\nreplaced instruction(s) for uprobes. The RISC-V port was missing a\nproper fence.i (i$ flushing) after constructing the XOL buffer, which\ncan result in incorrect execution of stale/broken instructions.\n\nThis was found running the BPF selftests \"test_progs:\nuprobe_autoattach, attach_probe\" on the Spacemit K1/X60, where the\nuprobes tests randomly blew up."
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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 - Exploitation requires local execution on the target — the attacker must run a process that executes the probed instruction and primes the I-cache at the user-mapped `[uprobes]` XOL page. There is no network-reachable path to `arch_uprobe_copy_ixol()`.\nAC:L - RISC-V has no implicit I$/D$ coherence, so the missing `fence.i` leaves stale lines as baseline architectural behavior, not a rare config; the attacker can trigger the XOL path repeatedly at will and can deliberately execute at the known, user-mapped XOL slot addresses to seed the stale lines. The bug was observed reproducing on stock hardware during ordinary selftest runs.\nPR:L - Once a uprobe is active — a routine observability configuration installed by an admin, not an attack step — an entirely unprivileged local user drives the vulnerable path just by calling the probed function in their own process. No capability is needed to reach `xol_get_insn_slot()` → `arch_uprobe_copy_ixol()`.\nUI:N - The attacker executes the probed instruction in its own process to trigger the XOL copy; no action by any other user or victim is required.\nS:U - The stale instruction executes in the traced process's own user context and the WARN/panic effects stay within the kernel's own authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The traced process — potentially a privileged daemon or setuid binary under a system-wide probe on libc/libssl — executes a stale instruction with its live register state, a control-flow-integrity failure that can branch into or read out that process's memory. The attacker influences what sits in the I-cache at that kernel-provided address.\nI:H - Executing a stale/wrong instruction with the probed process's live registers yields arbitrary stores and control-flow deviation inside that process, and the trailing ebreak may be skipped entirely, letting the PC run past the slot into adjacent slot contents.\nA:H - The probed process is killed via `force_sig(SIGILL)`, and the broken single-step contract hits `WARN_ON_ONCE` in both `arch_uprobe_post_xol()` and `handle_singlestep()`, which is a kernel panic under `panic_on_warn`. The commit reports uprobe selftests randomly blowing up on real hardware."
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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/riscv/kernel/probes/uprobes.c"
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],
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"versions": [
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{
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"version": "74784081aac8a0f3636965fc230e2d3b7cc123c6",
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"lessThan": "be6d98766ac952d38241d5a5b213f363afa421c3",
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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": "74784081aac8a0f3636965fc230e2d3b7cc123c6",
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"lessThan": "b6d8d4d01ca8514fa89b05355f296758a91e2297",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "77c956152a3a7c7a18b68f3654f70565b2181d03",
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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": "74784081aac8a0f3636965fc230e2d3b7cc123c6",
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"lessThan": "bcf6d3158c5902d92b6d62335af4422b7bf7c4e2",
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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": "74784081aac8a0f3636965fc230e2d3b7cc123c6",
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"lessThan": "1dbb95a36499374c51b47ee8ae258a8862c20978",
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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": "74784081aac8a0f3636965fc230e2d3b7cc123c6",
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"lessThan": "7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48",
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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/riscv/kernel/probes/uprobes.c"
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],
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"versions": [
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{
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"version": "5.12",
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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": "5.12",
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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": "5.15.200",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.163",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.121",
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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": "6.12.26",
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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": "6.14.5",
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"lessThanOrEqual": "6.14.*",
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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": "6.15",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.12",
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"versionEndExcluding": "5.15.200"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/be6d98766ac952d38241d5a5b213f363afa421c3"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6d8d4d01ca8514fa89b05355f296758a91e2297"
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},
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{
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"url": "https://git.kernel.org/stable/c/77c956152a3a7c7a18b68f3654f70565b2181d03"
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},
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{
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"url": "https://git.kernel.org/stable/c/bcf6d3158c5902d92b6d62335af4422b7bf7c4e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/1dbb95a36499374c51b47ee8ae258a8862c20978"
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},
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{
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"url": "https://git.kernel.org/stable/c/7d1d19a11cfbfd8bae1d89cc010b2cc397cd0c48"
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}
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],
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"title": "riscv: uprobes: Add missing fence.i after building the XOL buffer",
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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-2025-37822",
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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": "2026-10-15T21:45:27.323225Z"
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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": "2026-10-15T21:52:01.328Z"
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}
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}
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]
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}
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} |