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CVE-2023-53536— blk-crypto: make blk_crypto_evict_key() more robust

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blk_crypto_evict_key函数在失败时未从密钥槽管理结构中取消链接密钥，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1074 · Data Staged

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 1b2628397058ebce7277480960b29c788138de90< 701a8220762ff90615dc91d3543f789391b63298 affected
1b2628397058ebce7277480960b29c788138de90< 5bb4005fb667c6e2188fa87950f8d5faf2994410 affected
1b2628397058ebce7277480960b29c788138de90< 64ef787bb1588475163069c2e62fdd8f6c27b1f6 affected
1b2628397058ebce7277480960b29c788138de90< 809a5be62e92a444a3c3d7b9f438019d0b322f55 affected
1b2628397058ebce7277480960b29c788138de90< 5c62852942667c613de0458fc797c5b8c36112b5 affected
1b2628397058ebce7277480960b29c788138de90< 5c7cb94452901a93e90c2230632e2c12a681bc92 affected
5.8 affected
< 5.8 unaffected
… +6 more rows
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I. Basic Information for CVE-2023-53536

Vulnerability Information
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Vulnerability Title
blk-crypto: make blk_crypto_evict_key() more robust
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: blk-crypto: make blk_crypto_evict_key() more robust If blk_crypto_evict_key() sees that the key is still in-use (due to a bug) or that ->keyslot_evict failed, it currently just returns while leaving the key linked into the keyslot management structures. However, blk_crypto_evict_key() is only called in contexts such as inode eviction where failure is not an option. So actually the caller proceeds with freeing the blk_crypto_key regardless of the return value of blk_crypto_evict_key(). These two assumptions don't match, and the result is that there can be a use-after-free in blk_crypto_reprogram_all_keys() after one of these errors occurs. (Note, these errors *shouldn't* happen; we're just talking about what happens if they do anyway.) Fix this by making blk_crypto_evict_key() unlink the key from the keyslot management structures even on failure. Also improve some comments.
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blk_crypto_evict_key函数在失败时未从密钥槽管理结构中取消链接密钥，可能导致释放后重用。
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 1b2628397058ebce7277480960b29c788138de90 ~ 701a8220762ff90615dc91d3543f789391b63298 -
Linux Linux 5.8 -

II. Public POCs for CVE-2023-53536

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III. Intelligence Information for CVE-2023-53536

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Patches & Fixes for CVE-2023-53536 (6)

Same Patch Batch · Linux · 2025-10-04 · 144 CVEs total

CVE-2025-39932 9.8 CRITICAL smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
CVE-2025-39948 9.8 CRITICAL ice: fix Rx page leak on multi-buffer frames
CVE-2025-39946 9.8 CRITICAL tls: make sure to abort the stream if headers are bogus
CVE-2025-39933 9.4 CRITICAL smb: client: let recv_done verify data_offset, data_length and remaining_data_length
CVE-2025-39943 9.4 CRITICAL ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
CVE-2023-53600 9.1 CRITICAL tunnels: fix kasan splat when generating ipv4 pmtu error
CVE-2023-53615 8.8 HIGH scsi: qla2xxx: Fix deletion race condition
CVE-2025-39952 8.8 HIGH wifi: wilc1000: avoid buffer overflow in WID string configuration
CVE-2023-53589 8.8 HIGH wifi: iwlwifi: mvm: don't trust firmware n_channels
CVE-2023-53586 8.8 HIGH scsi: target: Fix multiple LUN_RESET handling
CVE-2022-50493 8.8 HIGH scsi: qla2xxx: Fix crash when I/O abort times out
CVE-2023-53598 8.4 HIGH bus: mhi: host: Range check CHDBOFF and ERDBOFF
CVE-2023-53554 7.8 HIGH staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext()
CVE-2023-53566 7.8 HIGH netfilter: nft_set_rbtree: fix null deref on element insertion
CVE-2023-53560 7.8 HIGH tracing/histograms: Add histograms to hist_vars if they have referenced variables
CVE-2023-53559 7.8 HIGH ip_vti: fix potential slab-use-after-free in decode_session6
CVE-2023-53539 7.8 HIGH RDMA/rxe: Fix incomplete state save in rxe_requester
CVE-2023-53545 7.8 HIGH drm/amdgpu: unmap and remove csa_va properly
CVE-2023-53552 7.8 HIGH drm/i915: mark requests for GuC virtual engines to avoid use-after-free
CVE-2025-39931 7.8 HIGH crypto: af_alg - Set merge to zero early in af_alg_sendmsg

Showing top 20 of 144 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53536

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