CVE-2026-53092bpf: Fix linked reg delta tracking when src_reg == dst_reg
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: bpf: Fix linked reg delta tracking when src_reg == dst_reg Consider the case of rX += rX where src_reg and dst_reg are pointers to the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first modifies the dst_reg in-place, and later in the delta tracking, the subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the post-{add,sub} value instead of the original source. This is problematic since it sets an incorrect delta, which sync_linked_regs() then propagates to linked registers, thus creating a verifier-vs-runtime mismatch. Fix it by just skipping this corner case.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-393
- 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 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 98d7ca374ba4b39e7535613d40e159f09ca14da2 before 1509c1ae9185ec7103899967ed788b6eebab3fcc; from 98d7ca374ba4b39e7535613d40e159f09ca14da2 before d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066; from 98d7ca374ba4b39e7535613d40e159f09ca14da2 before cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de; from 98d7ca374ba4b39e7535613d40e159f09ca14da2 before d7f14173c0d5866c3cae759dee560ad1bed10d2e | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 6.11 before 6.18.33; from 6.19 before 7.0.10 | NVD |
References
- https://git.kernel.org/stable/c/1509c1ae9185ec7103899967ed788b6eebab3fcc
- https://git.kernel.org/stable/c/d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066patch
- https://git.kernel.org/stable/c/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84depatch
- https://git.kernel.org/stable/c/d7f14173c0d5866c3cae759dee560ad1bed10d2epatch
- https://access.redhat.com/security/cve/CVE-2026-53092third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492362third-party-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53092.jsonthird-party-advisory
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.