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CVE-2026-46291— crypto: caam - guard HMAC key hex dumps in hash_digest_key

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caam驱动中HMAC密钥十六进制转储，可能导致密钥泄露。

AI Predicted 5.3 Difficulty: Theoretical EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1081

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 045e36780f11523e26d1e4a8c78bdc57f4003bd0< e8e72fdf47bd5ef7abe642b034c6178a61a8580a affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< cd849c07b8d706425e60a4dfcef54b7b67c967ce affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< a9207798fe619cbc85c8744a9b9e2af1db2b6e1a affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< 2adbfca7452eeac45117b8e803288a2767f7075f affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< c7e52fe3f7901ccb9cd29b3f7c683d809ba87e48 affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< 5cffe3c136891aa4d579bf5c079a68f7cb371b0c affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< b8f12d9b00c1950779e5679b9c13908584682bb6 affected
045e36780f11523e26d1e4a8c78bdc57f4003bd0< 177730a273b18e195263ed953853273e901b5064 affected
… +10 more rows
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I. Basic Information for CVE-2026-46291

Vulnerability Information
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Vulnerability Title
crypto: caam - guard HMAC key hex dumps in hash_digest_key
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: caam - guard HMAC key hex dumps in hash_digest_key Use print_hex_dump_devel() for dumping sensitive HMAC key bytes in hash_digest_key() to avoid leaking secrets at runtime when CONFIG_DYNAMIC_DEBUG is enabled.
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
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caam驱动中HMAC密钥十六进制转储，可能导致密钥泄露。
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 045e36780f11523e26d1e4a8c78bdc57f4003bd0 ~ e8e72fdf47bd5ef7abe642b034c6178a61a8580a -
Linux Linux 3.6 -

II. Public POCs for CVE-2026-46291

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III. Intelligence Information for CVE-2026-46291

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Patches & Fixes for CVE-2026-46291 (8)

Same Patch Batch · Linux · 2026-06-08 · 41 CVEs total

CVE-2026-46289 9.8 CRITICAL lib/scatterlist: fix length calculations in extract_kvec_to_sg
CVE-2026-46288 8.4 HIGH of: unittest: fix use-after-free in of_unittest_changeset()
CVE-2026-46307 8.3 HIGH wifi: ath5k: do not access array OOB
CVE-2026-46303 8.2 HIGH isofs: validate Rock Ridge CE continuation extent against volume size
CVE-2026-46274 7.8 HIGH io-wq: check that the predecessor is hashed in io_wq_remove_pending()
CVE-2026-46275 7.8 HIGH Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths
CVE-2026-46277 7.8 HIGH mm/zone_device: do not touch device folio after calling ->folio_free()
CVE-2026-46280 7.8 HIGH lib: test_hmm: evict device pages on file close to avoid use-after-free
CVE-2026-46311 7.8 HIGH drm/amdgpu/userq: fix access to stale wptr mapping
CVE-2026-46304 7.5 HIGH nvmet: avoid recursive nvmet-wq flush in nvmet_ctrl_free
CVE-2026-46306 7.5 HIGH flow_dissector: do not dissect PPPoE PFC frames
CVE-2026-46299 7.0 HIGH hfsplus: fix held lock freed on hfsplus_fill_super()
CVE-2026-46298 pseries/papr-hvpipe: Fix race with interrupt handler
CVE-2026-46314 drm/v3d: Reject empty multisync extension to prevent infinite loop
CVE-2026-46301 spi: topcliff-pch: fix use-after-free on unbind
CVE-2026-46302 selinux: allow multiple opens of /sys/fs/selinux/policy
CVE-2026-46305 staging: rtl8723bs: os_dep: avoid NULL pointer dereference in rtw_cbuf_alloc
CVE-2026-46308 pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()
CVE-2026-46309 drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise
CVE-2026-46310 media: renesas: vsp1: Fix NULL pointer deref on module unload

Showing top 20 of 41 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46291

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