CVE-2026-97589— s390/crypto: Fix wrong return code to engine in asynch callbacks
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.
在 Linux 内核中，已解决以下漏洞： s390/crypto：修复异步回调中向加密引擎返回错误代码的问题 当 或 显式完成请求时， 回调必须返回 0，以表示请求已成功处理。如果返回负值错误代码，加密引擎会误认为驱动程序未能取得请求的所有权，从而通过 触发第二次完成操作，导致双重完成（double completion）。该问题模式在 中出现 4 次，在 中出现 1 次。 修复方式：在 以及全部四个 的 回调（ecb、cbc、ctr、xts）中，在完成请求后返回 0，而非传递错误代码。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6cd87cb5ef6ca50ae17c371482ceaab1d635e232< 972e0d9b7d1d112240ccde1f1be85bf9ffaa1720 |
affected |
6cd87cb5ef6ca50ae17c371482ceaab1d635e232< 5480291aa848e19e61175abfd457933516db70c6 |
affected | ||
6cd87cb5ef6ca50ae17c371482ceaab1d635e232< ac1481320110b803ab9b79ab4d2ca11a74fc05f2 |
affected | ||
6.16 |
affected | ||
< 6.16 |
unaffected | ||
6.18.53≤ 6.18.* |
unaffected | ||
7.2.7≤ 7.2.* |
unaffected | ||
7.3-rc3≤ * |
unaffected |
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I. Basic Information for CVE-2026-97589
Vulnerability Information
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Vulnerability Title
s390/crypto: Fix wrong return code to engine in asynch callbacks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
s390/crypto: Fix wrong return code to engine in asynch callbacks
When crypto_finalize_hash_request() or
crypto_finalize_skcipher_request() explicitly completes a request, the
do_one_request callback must return 0 to indicate successful
handling. Returning a negative error code causes the crypto engine to
assume the driver failed to take ownership and triggers a second
completion via crypto_request_complete(), resulting in a double
completion. This pattern occurs in paes_s390.c 4 times and once in
phmac_s390.c.
Fixed in phmac_do_one_request() and all four paes do_one_request
callbacks (ecb, cbc, ctr, xts) by returning 0 after explicit
finalization instead of propagating the error code.
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
Affected Products
II. Public POCs for CVE-2026-97589
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-97589 (3)
Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters |
| CVE-2026-97957 | 8.8 HIGH | net: hinic: fix mailbox segment buffer overflow |
| CVE-2026-97527 | 8.8 HIGH | scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock |
| CVE-2026-97528 | 8.8 HIGH | scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error |
| CVE-2026-97555 | 8.8 HIGH | smb: client: fix heap overflow in DACL owner/group rewrite |
| CVE-2026-98115 | 8.8 HIGH | ksmbd: safely drain sessions during logoff |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat: Allocate split page tables as kernel page tables |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() |
| CVE-2026-98130 | 8.1 HIGH | sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START |
| CVE-2026-98069 | 8.1 HIGH | net/rds: acquire the fastpath locks in rds_conn_shutdown() |
| CVE-2026-98070 | 8.1 HIGH | net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks() |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: Bound SW TPA IDs to prevent crashes |
| CVE-2026-97911 | 7.8 HIGH | accel: ethosu: Ensure SRAM region size matches job |
| CVE-2026-98116 | 7.8 HIGH | ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF |
| CVE-2026-97910 | 7.8 HIGH | ASoC: sprd: validate compress buffer sizes against fixed allocations |
| CVE-2026-98143 | 7.8 HIGH | accel: ethosu: Don't read the U65 rounding mode as a storage mode |
| CVE-2026-97903 | 7.8 HIGH | exit: hold a reference to thread_pid across proc_flush_pid |
| CVE-2026-97548 | 7.8 HIGH | xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions |
| CVE-2026-97584 | 7.8 HIGH | afs: Fix incorrect free in candidate cleanup in afs_lookup_server() |
| CVE-2026-97602 | 7.8 HIGH | inet: frags: invalidate queues before flushing them |
Showing top 20 of 372 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-97589
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