CVE-2024-35895

Advisory lineage Upstream: 0 Downstream: 41
Modified
Published: 19 May 2024, 08:34
Last modified:12 May 2026, 11:52

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 May 2024, 08:34
Published
Vulnerability first disclosed
12 May 2026, 11:52
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-667•Improper Locking

    The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected Systems

  • debian•debian_linux

    10.0

  • linux•linux

    ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < f7990498b05ac41f7d6a190dc0418ef1d21bf058 | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < dd54b48db0c822ae7b520bc80751f0a0a173ef75 | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < a44770fed86515eedb5a7c00b787f847ebb134a5 | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < 668b3074aa14829e2ac2759799537a93b60fef86 | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < 6af057ccdd8e7619960aca1f0428339f213b31cd | ≥ 604326b41a6fb9b4a78b6179335decee0365cd8c, < ff91059932401894e6c86341915615c5eb0eca48 | 4.20

  • linux•linux_kernel

    ≥ 4.20, < 5.4.274 | ≥ 5.5, < 5.10.215 | ≥ 5.11, < 5.15.154 | ≥ 5.16, < 6.1.85 | ≥ 6.2, < 6.6.26 | ≥ 6.7, < 6.8.5 | 6.9:rc1 | 6.9:rc2

References (9)