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CVE-2026-98387— s390/crypto: Fix skcipher_walk return code handling in aes_s390

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，已修复以下漏洞： s390/crypto：修复 aes_s390 中 skcipher_walk 返回值处理的问题 在 ecb_aes_crypt() 和 ctr_aes_crypt() 函数的处理循环开始之前，未对 skcipher_walk_virt() 的返回值进行正确检查。如果 skcipher_walk_virt() 调用失败，walk 结构可能处于未定义状态，此时尝试处理数据可能导致异常行为或访问未初始化的内存。 新增适当的返回值检查，以确保正确初始化 walk 并正确处理 wa

AI Predicted 5.5 Difficulty: Moderate

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0< 89b58645646d1dac34162cc2597f42266bfbf930 affected
7988fb2c03c8cf9936f851ab19a6d21b3c3411c0< 35c3f97569306050e818fa18e17fa97c358f0f28 affected
7988fb2c03c8cf9936f851ab19a6d21b3c3411c0< aea3e1588f08e381a7a57b2bf1a60cc2347904cd affected
7988fb2c03c8cf9936f851ab19a6d21b3c3411c0< 15fa028589c3a2545f0bff355eff06d5844196bf affected
5.5 affected
< 5.5 unaffected
6.12.111≤ 6.12.* unaffected
6.18.53≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98387

Vulnerability Information
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Vulnerability Title
s390/crypto: Fix skcipher_walk return code handling in aes_s390
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix skcipher_walk return code handling in aes_s390 The return codes from skcipher_walk_virt() were not properly checked before entering the processing loops in ecb_aes_crypt() and ctr_aes_crypt(). If skcipher_walk_virt() fails, the walk structure may be in an undefined state, and attempting to process data could lead to incorrect behavior or accessing uninitialized memory. Add proper return code checking to ensure correct handling of the walk initialization and walk advance and eventually return to the caller with that return code.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7988fb2c03c8cf9936f851ab19a6d21b3c3411c0 ~ 89b58645646d1dac34162cc2597f42266bfbf930 -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-98387

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III. Intelligence Information for CVE-2026-98387

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Other References for CVE-2026-98387 (4)

Same Patch Batch · Linux · 2026-10-14 · 46 CVEs total

CVE-2026-98399 s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
CVE-2026-98395 powerpc/entry: Fix irq_soft_mask corruption on replayed interrupt exit
CVE-2026-98394 af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.
CVE-2026-98390 x86/amd_node: Avoid divide by zero on virtualized systems
CVE-2026-98391 drm/xe: Guard page-fault worker with runtime PM check
CVE-2026-98389 drm/amdgpu: skip gfx switch_power_profile during GPU reset
CVE-2026-98388 exec: do_close_on_exec() before taking exec_update_lock
CVE-2026-98386 scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot
CVE-2026-98392 Bluetooth: btintel_pcie: fix tx_handle bounds off-by-one
CVE-2026-98398 locking/lockdep: Invalidate stale class_cache entries for zapped classes
CVE-2026-98397 platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
CVE-2026-98400 s390/ipl: Fix NULL deref in kdump without re-IPL parm block
CVE-2026-98402 net: icmp: avoid invalid transport header access in icmp_send tracepoint
CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation
CVE-2026-98403 s390/boot: Avoid IPL parameter append past command line
CVE-2026-98404 drm/virtio: Fix a NULL vs ERR_PTR() bug in virtio_gpu_user_framebuffer_create()
CVE-2026-98405 smb: client: fix missing iov bounds check in parse_posix_sids()
CVE-2026-98406 wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
CVE-2026-98408 watchdog: rzv2h: Avoid division by zero
CVE-2026-98407 wifi: rsi: fix heap OOB write on key removal

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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