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CVE-2025-37984— crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()

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DIV_ROUND_UP整数溢出，可能导致计算错误。

CVSS 7.0 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 55779f26eab9af12474a447001bd17070f055712< f02f0218be412cff1c844addf58e002071be298b affected
c6ab5c915da460c0397960af3c308386c3f3247b< f2133b849ff273abddb6da622daddd8f6f6fa448 affected
c6ab5c915da460c0397960af3c308386c3f3247b< 921b8167f10708e38080f84e195cdc68a7a561f1 affected
c6ab5c915da460c0397960af3c308386c3f3247b< b16510a530d1e6ab9683f04f8fb34f2e0f538275 affected
6.6.70< 6.6.99 affected
6.10 affected
< 6.10 unaffected
6.6.99≤ 6.6.* unaffected
… +3 more rows
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I. Basic Information for CVE-2025-37984

Vulnerability Information
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Vulnerability Title
crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP() Herbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa implementation's ->key_size() callback returns an unusually large value. Herbert instead suggests (for a division by 8): X / 8 + !!(X & 7) Based on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and use it in lieu of DIV_ROUND_UP() for ->key_size() return values. Additionally, use the macro in ecc_digits_from_bytes(), whose "nbytes" parameter is a ->key_size() return value in some instances, or a user-specified ASN.1 length in the case of ecdsa_get_signature_rs().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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DIV_ROUND_UP整数溢出，可能导致计算错误。
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 55779f26eab9af12474a447001bd17070f055712 ~ f02f0218be412cff1c844addf58e002071be298b -
Linux Linux 6.10 -

II. Public POCs for CVE-2025-37984

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III. Intelligence Information for CVE-2025-37984

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Patches & Fixes for CVE-2025-37984 (2)

Same Patch Batch · Linux · 2025-05-20 · 95 CVEs total

CVE-2025-37894 9.8 CRITICAL net: use sock_gen_put() when sk_state is TCP_TIME_WAIT
CVE-2025-37924 9.8 CRITICAL ksmbd: fix use-after-free in kerberos authentication
CVE-2025-37935 9.8 CRITICAL net: ethernet: mtk_eth_soc: fix SER panic with 4GB+ RAM
CVE-2025-37959 9.4 CRITICAL bpf: Scrub packet on bpf_redirect_peer
CVE-2025-37926 8.8 HIGH ksmbd: fix use-after-free in ksmbd_session_rpc_open
CVE-2025-37899 8.8 HIGH ksmbd: fix use-after-free in session logoff
CVE-2025-37918 8.8 HIGH Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()
CVE-2025-37943 8.8 HIGH wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi
CVE-2025-37944 8.8 HIGH wifi: ath12k: Fix invalid entry fetch in ath12k_dp_mon_srng_process
CVE-2025-37947 8.8 HIGH ksmbd: prevent out-of-bounds stream writes by validating *pos
CVE-2025-37952 8.8 HIGH ksmbd: Fix UAF in __close_file_table_ids
CVE-2025-37956 8.8 HIGH ksmbd: prevent rename with empty string
CVE-2025-37957 8.8 HIGH KVM: SVM: Forcibly leave SMM mode on SHUTDOWN interception
CVE-2025-37936 8.7 HIGH perf/x86/intel: KVM: Mask PEBS_ENABLE loaded for guest with vCPU's value.
CVE-2025-37973 8.1 HIGH wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation
CVE-2025-37901 7.8 HIGH irqchip/qcom-mpm: Prevent crash when trying to handle non-wake GPIOs
CVE-2025-37906 7.8 HIGH ublk: fix race between io_uring_cmd_complete_in_task and ublk_cancel_cmd
CVE-2025-37921 7.8 HIGH vxlan: vnifilter: Fix unlocked deletion of default FDB entry
CVE-2025-37923 7.8 HIGH tracing: Fix oob write in trace_seq_to_buffer()
CVE-2025-37903 7.8 HIGH drm/amd/display: Fix slab-use-after-free in hdcp

Showing top 20 of 95 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-37984

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