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CVE-2026-74438— crypto: sun4i-ss - Remove insecure and unused rng_alg

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sun4i_ss_rng的sun4i_ss_prng_seed函数缺少锁定且存在缓冲区溢出，sun4i_ss_prng_generate函数无法填充整个缓冲区且未等待硬件就绪，可能导致缓冲区溢出和加密随机数生成不完整。

CVSS 7.8 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1552.007 · Container API

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< 2eafecaba1b46bb9774eaf3556619fd5b6a17c1c affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< ee2458f8188732aa53a5d42f56e87bfad288b44e affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< 306ded31bfa00a69d25823a60d7c797170bfb4f8 affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< e4b7b9819811c4c51064c3d3d3c02f0be7491707 affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< c401492e01c7bfd38cf14c94d85c7efafe7d1a25 affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< 9c8086d9511189c34dfa3f9e3a03f2bee12f56a5 affected
b8ae5c7387ad075ee61e8c8774ce2bca46bc9236< b2c41fa9dd8fc740c489e060b199165771f268d1 affected
4.14 affected
… +8 more rows
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I. Basic Information for CVE-2026-74438

Vulnerability Information
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Vulnerability Title
crypto: sun4i-ss - Remove insecure and unused rng_alg
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: sun4i-ss - Remove insecure and unused rng_alg Remove sun4i_ss_rng, as it is insecure and unused: - It has multiple vulnerabilities. sun4i_ss_prng_seed() is missing locking and has a buffer overflow. sun4i_ss_prng_generate() fails to fill the entire buffer with cryptographic random bytes, because it rounds the destination length down and also doesn't actually wait for the hardware to be ready before pulling bytes from it. - No user of this code is known. It's usable only theoretically via the "rng" algorithm type of AF_ALG. But userspace actually just uses the actual Linux RNG (/dev/random etc) instead. And rng_algs don't contribute entropy to the actual Linux RNG either. (This may have been confused with hwrng, which does contribute entropy.) The sun4i_ss_prng_seed() buffer overflow was reported by Tianchu Chen and discovered by Atuin - Automated Vulnerability Discovery Engine There's no point in fixing all these vulnerabilities individually when this is unused code, so let's just remove it.
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sun4i_ss_rng的sun4i_ss_prng_seed函数缺少锁定且存在缓冲区溢出，sun4i_ss_prng_generate函数无法填充整个缓冲区且未等待硬件就绪，可能导致缓冲区溢出和加密随机数生成不完整。
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 b8ae5c7387ad075ee61e8c8774ce2bca46bc9236 ~ 2eafecaba1b46bb9774eaf3556619fd5b6a17c1c -
Linux Linux 4.14 -

II. Public POCs for CVE-2026-74438

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III. Intelligence Information for CVE-2026-74438

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Patches & Fixes for CVE-2026-74438 (6)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74398 9.8 CRITICAL ipv6: addrconf: bail out of dad_failure when state is no longer POSTDAD
CVE-2026-72191 9.8 CRITICAL ntfs3: validate split-point offset in indx_insert_into_buffer
CVE-2026-74401 9.8 CRITICAL dlm: fix add msg handle in send_queue ordered
CVE-2026-72084 9.8 CRITICAL scsi: target: Bound PR-OUT TransportID parsing to the received buffer
CVE-2026-72083 9.8 CRITICAL scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE
CVE-2026-74315 9.8 CRITICAL lockd: Avoid hashing uninitialized bytes in nlm4svc_lookup_file()
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-74493 9.8 CRITICAL net/smc: fix socket use-after-free during link group termination
CVE-2026-74345 9.8 CRITICAL RDMA/siw: Fix endpoint/socket association handling
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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