CVE-2024-35895bpf, sockmap: Prevent lock inversion deadlock in map delete elem
Updated under an hour ago ()
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It affects Linux and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 604326b41a6fb9b4a78b6179335decee0365cd8c before f7990498b05ac41f7d6a190dc0418ef1d21bf058; from 604326b41a6fb9b4a78b6179335decee0365cd8c before dd54b48db0c822ae7b520bc80751f0a0a173ef75; from 604326b41a6fb9b4a78b6179335decee0365cd8c before d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec; from 604326b41a6fb9b4a78b6179335decee0365cd8c before a44770fed86515eedb5a7c00b787f847ebb134a5; 604326b41a6fb9b4a78b6179335decee0365cd8c builds before 668b3074aa14829e2ac2759799537a93b60fef86; 604326b41a6fb9b4a78b6179335decee0365cd8c builds before 6af057ccdd8e7619960aca1f0428339f213b31cd; from 604326b41a6fb9b4a78b6179335decee0365cd8c before ff91059932401894e6c86341915615c5eb0eca48 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.20 before 5.4.274; from 5.5 before 5.10.215; from 5.11 before 5.15.154; from 5.16 before 6.1.85; from 6.2 before 6.6.26; from 6.7 before 6.8.5; 6.9; 6.9 | NVD |
debian debian_linux debian:debian_linux | 10.0 | NVD |
References
- https://git.kernel.org/stable/c/f7990498b05ac41f7d6a190dc0418ef1d21bf058patch
- https://git.kernel.org/stable/c/dd54b48db0c822ae7b520bc80751f0a0a173ef75patch
- https://git.kernel.org/stable/c/d1e73fb19a4c872d7a399ad3c66e8ca30e0875ecpatch
- https://git.kernel.org/stable/c/a44770fed86515eedb5a7c00b787f847ebb134a5patch
- https://git.kernel.org/stable/c/668b3074aa14829e2ac2759799537a93b60fef86patch
- https://git.kernel.org/stable/c/6af057ccdd8e7619960aca1f0428339f213b31cdpatch
- https://git.kernel.org/stable/c/ff91059932401894e6c86341915615c5eb0eca48patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlmailing-list
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.