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CVE-2023-52761— riscv: VMAP_STACK overflow detection thread-safe

CVSS 7.8 · High EPSS 0.27% · P19

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinux76d2a0493a17d4c8ecc781366850c3c4f8e1a446< 1493baaf09e3c1899959c8a107cd1207e16d1788affected
76d2a0493a17d4c8ecc781366850c3c4f8e1a446< eff53aea3855f71992c043cebb1c00988c17ee20affected
76d2a0493a17d4c8ecc781366850c3c4f8e1a446< be97d0db5f44c0674480cb79ac6f5b0529b84c76affected
4.15affected
< 4.15unaffected
6.5.13≤ 6.5.*unaffected
6.6.3≤ 6.6.*unaffected
6.7≤ *unaffected
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I. Basic Information for CVE-2023-52761

Vulnerability Information
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Vulnerability Title
riscv: VMAP_STACK overflow detection thread-safe
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: riscv: VMAP_STACK overflow detection thread-safe commit 31da94c25aea ("riscv: add VMAP_STACK overflow detection") added support for CONFIG_VMAP_STACK. If overflow is detected, CPU switches to `shadow_stack` temporarily before switching finally to per-cpu `overflow_stack`. If two CPUs/harts are racing and end up in over flowing kernel stack, one or both will end up corrupting each other state because `shadow_stack` is not per-cpu. This patch optimizes per-cpu overflow stack switch by directly picking per-cpu `overflow_stack` and gets rid of `shadow_stack`. Following are the changes in this patch - Defines an asm macro to obtain per-cpu symbols in destination register. - In entry.S, when overflow is detected, per-cpu overflow stack is located using per-cpu asm macro. Computing per-cpu symbol requires a temporary register. x31 is saved away into CSR_SCRATCH (CSR_SCRATCH is anyways zero since we're in kernel). Please see Links for additional relevant disccussion and alternative solution. Tested by `echo EXHAUST_STACK > /sys/kernel/debug/provoke-crash/DIRECT` Kernel crash log below Insufficient stack space to handle exception!/debug/provoke-crash/DIRECT Task stack: [0xff20000010a98000..0xff20000010a9c000] Overflow stack: [0xff600001f7d98370..0xff600001f7d99370] CPU: 1 PID: 205 Comm: bash Not tainted 6.1.0-rc2-00001-g328a1f96f7b9 #34 Hardware name: riscv-virtio,qemu (DT) epc : __memset+0x60/0xfc ra : recursive_loop+0x48/0xc6 [lkdtm] epc : ffffffff808de0e4 ra : ffffffff0163a752 sp : ff20000010a97e80 gp : ffffffff815c0330 tp : ff600000820ea280 t0 : ff20000010a97e88 t1 : 000000000000002e t2 : 3233206874706564 s0 : ff20000010a982b0 s1 : 0000000000000012 a0 : ff20000010a97e88 a1 : 0000000000000000 a2 : 0000000000000400 a3 : ff20000010a98288 a4 : 0000000000000000 a5 : 0000000000000000 a6 : fffffffffffe43f0 a7 : 00007fffffffffff s2 : ff20000010a97e88 s3 : ffffffff01644680 s4 : ff20000010a9be90 s5 : ff600000842ba6c0 s6 : 00aaaaaac29e42b0 s7 : 00fffffff0aa3684 s8 : 00aaaaaac2978040 s9 : 0000000000000065 s10: 00ffffff8a7cad10 s11: 00ffffff8a76a4e0 t3 : ffffffff815dbaf4 t4 : ffffffff815dbaf4 t5 : ffffffff815dbab8 t6 : ff20000010a9bb48 status: 0000000200000120 badaddr: ff20000010a97e88 cause: 000000000000000f Kernel panic - not syncing: Kernel stack overflow CPU: 1 PID: 205 Comm: bash Not tainted 6.1.0-rc2-00001-g328a1f96f7b9 #34 Hardware name: riscv-virtio,qemu (DT) Call Trace: [<ffffffff80006754>] dump_backtrace+0x30/0x38 [<ffffffff808de798>] show_stack+0x40/0x4c [<ffffffff808ea2a8>] dump_stack_lvl+0x44/0x5c [<ffffffff808ea2d8>] dump_stack+0x18/0x20 [<ffffffff808dec06>] panic+0x126/0x2fe [<ffffffff800065ea>] walk_stackframe+0x0/0xf0 [<ffffffff0163a752>] recursive_loop+0x48/0xc6 [lkdtm] SMP: stopping secondary CPUs ---[ end Kernel panic - not syncing: Kernel stack overflow ]---
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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riscv模块存在漏洞。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 76d2a0493a17d4c8ecc781366850c3c4f8e1a446 ~ 1493baaf09e3c1899959c8a107cd1207e16d1788 -
LinuxLinux 4.15 -

II. Public POCs for CVE-2023-52761

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III. Intelligence Information for CVE-2023-52761

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Other References for CVE-2023-52761 (3)

Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2021-474279.8 CRITICALscsi: iscsi: Fix iscsi_task use after free
CVE-2021-473289.8 CRITICALscsi: iscsi: Fix conn use after free during resets
CVE-2023-527329.8 CRITICALceph: blocklist the kclient when receiving corrupted snap trace
CVE-2023-527419.8 CRITICALcifs: Fix use-after-free in rdata->read_into_pages()
CVE-2021-472329.8 CRITICALcan: j1939: fix Use-after-Free, hold skb ref while in use
CVE-2023-527559.8 CRITICALksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2021-473789.8 CRITICALnvme-rdma: destroy cm id before destroy qp to avoid use after free
CVE-2021-473088.8 HIGHscsi: libfc: Fix array index out of bound exception
CVE-2023-528018.8 HIGHiommufd: Fix missing update of domains_itree after splitting iopt_area
CVE-2023-527988.8 HIGHwifi: ath11k: fix dfs radar event locking
CVE-2023-528468.8 HIGHhsr: Prevent use after free in prp_create_tagged_frame()
CVE-2023-527908.8 HIGHswiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC
CVE-2023-527768.8 HIGHwifi: ath12k: fix dfs-radar and temperature event locking
CVE-2023-527698.8 HIGHwifi: ath12k: fix htt mlo-offset event locking
CVE-2021-473888.8 HIGHmac80211: fix use-after-free in CCMP/GCMP RX
CVE-2021-473908.8 HIGHKVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect()
CVE-2023-528298.4 HIGHwifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()
CVE-2021-473528.4 HIGHvirtio-net: Add validation for used length
CVE-2021-472408.4 HIGHnet: qrtr: fix OOB Read in qrtr_endpoint_post
CVE-2021-472448.2 HIGHmptcp: Fix out of bounds when parsing TCP options

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52761

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