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CVE-2024-42318— landlock: Don't lose track of restrictions on cred_transfer

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，该漏洞源于在特定情况下丢失Landlock限制。

CVSS 8.8 · High EPSS 0.30% · P21

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 385975dca53eb41031d0cbd1de318eb1bc5d6bb9< 916c648323fa53b89eedb34a0988ddaf01406117 affected
385975dca53eb41031d0cbd1de318eb1bc5d6bb9< 0d74fd54db0bd0c0c224bef0da8fc95ea9c9f36c affected
385975dca53eb41031d0cbd1de318eb1bc5d6bb9< 16896914bace82d7811c62f3b6d5320132384f49 affected
385975dca53eb41031d0cbd1de318eb1bc5d6bb9< b14cc2cf313bd29056fadbc8ecd7f957cf5791ff affected
385975dca53eb41031d0cbd1de318eb1bc5d6bb9< 39705a6c29f8a2b93cf5b99528a55366c50014d1 affected
5.13 affected
< 5.13 unaffected
5.15.165≤ 5.15.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-42318

Vulnerability Information
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Vulnerability Title
landlock: Don't lose track of restrictions on cred_transfer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: landlock: Don't lose track of restrictions on cred_transfer When a process' cred struct is replaced, this _almost_ always invokes the cred_prepare LSM hook; but in one special case (when KEYCTL_SESSION_TO_PARENT updates the parent's credentials), the cred_transfer LSM hook is used instead. Landlock only implements the cred_prepare hook, not cred_transfer, so KEYCTL_SESSION_TO_PARENT causes all information on Landlock restrictions to be lost. This basically means that a process with the ability to use the fork() and keyctl() syscalls can get rid of all Landlock restrictions on itself. Fix it by adding a cred_transfer hook that does the same thing as the existing cred_prepare hook. (Implemented by having hook_cred_prepare() call hook_cred_transfer() so that the two functions are less likely to accidentally diverge in the future.)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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，该漏洞源于在特定情况下丢失Landlock限制。
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 385975dca53eb41031d0cbd1de318eb1bc5d6bb9 ~ 916c648323fa53b89eedb34a0988ddaf01406117 -
Linux Linux 5.13 -

II. Public POCs for CVE-2024-42318

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III. Intelligence Information for CVE-2024-42318

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Mailing List Discussions for CVE-2024-42318 (1)

Other References for CVE-2024-42318 (6)

Same Patch Batch · Linux · 2024-08-17 · 109 CVEs total

CVE-2024-42285 9.8 CRITICAL RDMA/iwcm: Fix a use-after-free related to destroying CM IDs
CVE-2024-42284 9.1 CRITICAL tipc: Return non-zero value from tipc_udp_addr2str() on error
CVE-2024-42287 8.8 HIGH scsi: qla2xxx: Complete command early within lock
CVE-2024-43847 8.8 HIGH wifi: ath12k: fix invalid memory access while processing fragmented packets
CVE-2024-43848 8.8 HIGH wifi: mac80211: fix TTLM teardown work
CVE-2024-42279 7.8 HIGH spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
CVE-2024-42299 7.8 HIGH fs/ntfs3: Update log->page_{mask,bits} if log->page_size changed
CVE-2024-42297 7.8 HIGH f2fs: fix to don't dirty inode for readonly filesystem
CVE-2024-43840 7.8 HIGH bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG
CVE-2024-42296 7.8 HIGH f2fs: fix return value of f2fs_convert_inline_inode()
CVE-2024-42314 7.8 HIGH btrfs: fix extent map use-after-free when adding pages to compressed bio
CVE-2024-42293 7.8 HIGH arm64: mm: Fix lockless walks with static and dynamic page-table folding
CVE-2024-43832 7.8 HIGH s390/uv: Don't call folio_wait_writeback() without a folio reference
CVE-2024-43830 7.8 HIGH leds: trigger: Unregister sysfs attributes before calling deactivate()
CVE-2024-42300 7.8 HIGH erofs: fix race in z_erofs_get_gbuf()
CVE-2024-43845 7.8 HIGH udf: Fix bogus checksum computation in udf_rename()
CVE-2024-42288 7.8 HIGH scsi: qla2xxx: Fix for possible memory corruption
CVE-2024-43846 7.8 HIGH lib: objagg: Fix general protection fault
CVE-2024-42280 7.8 HIGH mISDN: Fix a use after free in hfcmulti_tx()
CVE-2024-42306 7.8 HIGH udf: Avoid using corrupted block bitmap buffer

Showing top 20 of 109 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-42318

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