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CVE-2024-35895— bpf, sockmap: Prevent lock inversion deadlock in map delete elem

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，该漏洞源于存在死锁问题。

AI Predicted 7.5 Difficulty: Hard EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 604326b41a6fb9b4a78b6179335decee0365cd8c< f7990498b05ac41f7d6a190dc0418ef1d21bf058 affected
604326b41a6fb9b4a78b6179335decee0365cd8c< dd54b48db0c822ae7b520bc80751f0a0a173ef75 affected
604326b41a6fb9b4a78b6179335decee0365cd8c< d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec affected
604326b41a6fb9b4a78b6179335decee0365cd8c< a44770fed86515eedb5a7c00b787f847ebb134a5 affected
604326b41a6fb9b4a78b6179335decee0365cd8c< 668b3074aa14829e2ac2759799537a93b60fef86 affected
604326b41a6fb9b4a78b6179335decee0365cd8c< 6af057ccdd8e7619960aca1f0428339f213b31cd affected
604326b41a6fb9b4a78b6179335decee0365cd8c< ff91059932401894e6c86341915615c5eb0eca48 affected
4.20 affected
… +8 more rows
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I. Basic Information for CVE-2024-35895

Vulnerability Information
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Vulnerability Title
bpf, sockmap: Prevent lock inversion deadlock in map delete elem
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Prevent lock inversion deadlock in map delete elem syzkaller started using corpuses where a BPF tracing program deletes elements from a sockmap/sockhash map. Because BPF tracing programs can be invoked from any interrupt context, locks taken during a map_delete_elem operation must be hardirq-safe. Otherwise a deadlock due to lock inversion is possible, as reported by lockdep: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&host->lock); lock(&htab->buckets[i].lock); <Interrupt> lock(&host->lock); Locks in sockmap are hardirq-unsafe by design. We expects elements to be deleted from sockmap/sockhash only in task (normal) context with interrupts enabled, or in softirq context. Detect when map_delete_elem operation is invoked from a context which is _not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an error. Note that map updates are not affected by this issue. BPF verifier does not allow updating sockmap/sockhash from a BPF tracing program today.
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，该漏洞源于存在死锁问题。
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 604326b41a6fb9b4a78b6179335decee0365cd8c ~ f7990498b05ac41f7d6a190dc0418ef1d21bf058 -
Linux Linux 4.20 -

II. Public POCs for CVE-2024-35895

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III. Intelligence Information for CVE-2024-35895

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Patches & Fixes for CVE-2024-35895 (1)

Mailing List Discussions for CVE-2024-35895 (1)

Other References for CVE-2024-35895 (7)

Same Patch Batch · Linux · 2024-05-19 · 82 CVEs total

CVE-2024-35861 9.8 CRITICAL smb: client: fix potential UAF in cifs_signal_cifsd_for_reconnect()
CVE-2024-35862 9.8 CRITICAL smb: client: fix potential UAF in smb2_is_network_name_deleted()
CVE-2024-35863 9.8 CRITICAL smb: client: fix potential UAF in is_valid_oplock_break()
CVE-2024-35864 9.8 CRITICAL smb: client: fix potential UAF in smb2_is_valid_lease_break()
CVE-2024-35865 9.8 CRITICAL smb: client: fix potential UAF in smb2_is_valid_oplock_break()
CVE-2024-35884 9.8 CRITICAL udp: do not accept non-tunnel GSO skbs landing in a tunnel
CVE-2024-35870 9.8 CRITICAL smb: client: fix UAF in smb2_reconnect_server()
CVE-2024-35869 9.8 CRITICAL smb: client: guarantee refcounted children from parent session
CVE-2024-35939 9.3 CRITICAL dma-direct: Leak pages on dma_set_decrypted() failure
CVE-2024-35887 8.8 HIGH ax25: fix use-after-free bugs caused by ax25_ds_del_timer
CVE-2024-35915 8.8 HIGH nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet
CVE-2024-35889 8.6 HIGH idpf: fix kernel panic on unknown packet types
CVE-2024-35875 8.4 HIGH x86/coco: Require seeding RNG with RDRAND on CoCo systems
CVE-2024-35937 8.1 HIGH wifi: cfg80211: check A-MSDU format more carefully
CVE-2024-35919 7.8 HIGH media: mediatek: vcodec: adding lock to protect encoder context list
CVE-2024-35931 7.8 HIGH drm/amdgpu: Skip do PCI error slot reset during RAS recovery
CVE-2024-35890 7.8 HIGH gro: fix ownership transfer
CVE-2024-35920 7.8 HIGH media: mediatek: vcodec: adding lock to protect decoder context list
CVE-2024-35921 7.8 HIGH media: mediatek: vcodec: Fix oops when HEVC init fails
CVE-2024-35897 7.8 HIGH netfilter: nf_tables: discard table flag update with pending basechain deletion

Showing top 20 of 82 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35895

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