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CVE-2025-38033— x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST or Rust >= 1.88

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于Rust版本不兼容，可能导致内核崩溃。

AI Predicted 5.3 Difficulty: Theoretical EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux d6f635bcaca8d38dfa47ee20658705f9eff156b5< 5a8d073d87da4ad1496b35adaee5719e94665d81 affected
d6f635bcaca8d38dfa47ee20658705f9eff156b5< 6b9956d09382bcbd5fd260c4b60ec48680a4cffb affected
d6f635bcaca8d38dfa47ee20658705f9eff156b5< 5595c31c370957aabe739ac3996aedba8267603f affected
6.11 affected
< 6.11 unaffected
6.12.31≤ 6.12.* unaffected
6.14.9≤ 6.14.* unaffected
6.15≤ * unaffected
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I. Basic Information for CVE-2025-38033

Vulnerability Information
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Vulnerability Title
x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST or Rust >= 1.88
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST or Rust >= 1.88 Calling core::fmt::write() from rust code while FineIBT is enabled results in a kernel panic: [ 4614.199779] kernel BUG at arch/x86/kernel/cet.c:132! [ 4614.205343] Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 4614.211781] CPU: 2 UID: 0 PID: 6057 Comm: dmabuf_dump Tainted: G U O 6.12.17-android16-0-g6ab38c534a43 #1 9da040f27673ec3945e23b998a0f8bd64c846599 [ 4614.227832] Tainted: [U]=USER, [O]=OOT_MODULE [ 4614.241247] RIP: 0010:do_kernel_cp_fault+0xea/0xf0 ... [ 4614.398144] RIP: 0010:_RNvXs5_NtNtNtCs3o2tGsuHyou_4core3fmt3num3impyNtB9_7Display3fmt+0x0/0x20 [ 4614.407792] Code: 48 f7 df 48 0f 48 f9 48 89 f2 89 c6 5d e9 18 fd ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 81 ea 14 61 af 2c 74 03 0f 0b 90 <66> 0f 1f 00 55 48 89 e5 48 89 f2 48 8b 3f be 01 00 00 00 5d e9 e7 [ 4614.428775] RSP: 0018:ffffb95acfa4ba68 EFLAGS: 00010246 [ 4614.434609] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000 [ 4614.442587] RDX: 0000000000000007 RSI: ffffb95acfa4ba70 RDI: ffffb95acfa4bc88 [ 4614.450557] RBP: ffffb95acfa4bae0 R08: ffff0a00ffffff05 R09: 0000000000000070 [ 4614.458527] R10: 0000000000000000 R11: ffffffffab67eaf0 R12: ffffb95acfa4bcc8 [ 4614.466493] R13: ffffffffac5d50f0 R14: 0000000000000000 R15: 0000000000000000 [ 4614.474473] ? __cfi__RNvXs5_NtNtNtCs3o2tGsuHyou_4core3fmt3num3impyNtB9_7Display3fmt+0x10/0x10 [ 4614.484118] ? _RNvNtCs3o2tGsuHyou_4core3fmt5write+0x1d2/0x250 This happens because core::fmt::write() calls core::fmt::rt::Argument::fmt(), which currently has CFI disabled: library/core/src/fmt/rt.rs: 171 // FIXME: Transmuting formatter in new and indirectly branching to/calling 172 // it here is an explicit CFI violation. 173 #[allow(inline_no_sanitize)] 174 #[no_sanitize(cfi, kcfi)] 175 #[inline] 176 pub(super) unsafe fn fmt(&self, f: &mut Formatter<'_>) -> Result { This causes a Control Protection exception, because FineIBT has sealed off the original function's endbr64. This makes rust currently incompatible with FineIBT. Add a Kconfig dependency that prevents FineIBT from getting turned on by default if rust is enabled. [ Rust 1.88.0 (scheduled for 2025-06-26) should have this fixed [1], and thus we relaxed the condition with Rust >= 1.88. When `objtool` lands checking for this with e.g. [2], the plan is to ideally run that in upstream Rust's CI to prevent regressions early [3], since we do not control `core`'s source code. Alice tested the Rust PR backported to an older compiler. Peter would like that Rust provides a stable `core` which can be pulled into the kernel: "Relying on that much out of tree code is 'unfortunate'". - Miguel ] [ Reduced splat. - Miguel ]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于Rust版本不兼容，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d6f635bcaca8d38dfa47ee20658705f9eff156b5 ~ 5a8d073d87da4ad1496b35adaee5719e94665d81 -
Linux Linux 6.11 -

II. Public POCs for CVE-2025-38033

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III. Intelligence Information for CVE-2025-38033

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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075 9.8 CRITICAL scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-50035 7.8 HIGH drm/amdgpu: Fix use-after-free on amdgpu_bo_list mutex
CVE-2022-49944 7.8 HIGH Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
CVE-2022-50028 7.8 HIGH gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-50182 7.8 HIGH media: imx-jpeg: Align upwards buffer size
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38060 7.8 HIGH bpf: copy_verifier_state() should copy 'loop_entry' field
CVE-2022-50101 7.8 HIGH video: fbdev: vt8623fb: Check the size of screen before memset_io()
CVE-2025-38062 7.8 HIGH genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38033

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