cbcvebase.
CVE-2024-35895
published 2024-05-19

CVE-2024-35895: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Prevent lock inversion deadlock in map delete elem syzkaller started using…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
7.8th percentile
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); 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.

Affected

24 ranges
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.85-1 (bookworm)linux 6.1.85-1 (bookworm)
linuxlinux
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < f7990498b05ac41f7d6a190dc0418ef1d21bf058f7990498b05ac41f7d6a190dc0418ef1d21bf058
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < dd54b48db0c822ae7b520bc80751f0a0a173ef75dd54b48db0c822ae7b520bc80751f0a0a173ef75
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < d1e73fb19a4c872d7a399ad3c66e8ca30e0875ecd1e73fb19a4c872d7a399ad3c66e8ca30e0875ec
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < a44770fed86515eedb5a7c00b787f847ebb134a5a44770fed86515eedb5a7c00b787f847ebb134a5
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < 668b3074aa14829e2ac2759799537a93b60fef86668b3074aa14829e2ac2759799537a93b60fef86
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < 6af057ccdd8e7619960aca1f0428339f213b31cd6af057ccdd8e7619960aca1f0428339f213b31cd
linuxlinux>= 604326b41a6fb9b4a78b6179335decee0365cd8c < ff91059932401894e6c86341915615c5eb0eca48ff91059932401894e6c86341915615c5eb0eca48
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.85-16.1.85-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-116.1265.15.0-116.126
linuxlinux_kernel>= 0 < 6.8.0-38.386.8.0-38.38
linuxlinux_kernel>= 4.20 < 5.4.2745.4.274
linuxlinux_kernel>= 5.11 < 5.15.1545.15.154
linuxlinux_kernel>= 5.16 < 6.1.856.1.85
linuxlinux_kernel>= 5.5 < 5.10.2155.10.215
linuxlinux_kernel>= 6.2 < 6.6.266.6.26
linuxlinux_kernel>= 6.7 < 6.8.56.8.5

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.0HIGH
vendor_ubuntu7.0HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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