From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@kernel.org>
Subject: CVE-2026-72402: bpf: Mask pseudo pointer values in verifier logs
Date: Sat, 15 Aug 2026 15:08:01 +0900 [thread overview]
Message-ID: <2026081522-CVE-2026-72402-4c1c@gregkh> (raw)
From: Greg Kroah-Hartman <gregkh@kernel.org>
Description
===========
In the Linux kernel, the following vulnerability has been resolved:
bpf: Mask pseudo pointer values in verifier logs
print_bpf_insn() masks ldimm64 immediates for pointer-bearing pseudo
sources when pointer leaks are not allowed, but the mask only covers
BPF_PSEUDO_MAP_FD and BPF_PSEUDO_MAP_VALUE.
BPF_PSEUDO_MAP_IDX, BPF_PSEUDO_MAP_IDX_VALUE, and BPF_PSEUDO_BTF_ID can
also be resolved to kernel pointer values before the verifier log prints
the instruction. Include them in the existing pointer classification so
the log prints 0x0 instead of the rewritten address.
The Linux kernel CVE team has assigned CVE-2026-72402 to this issue.
Affected and fixed versions
===========================
Issue introduced in 5.10 with commit 4976b718c3551faba2c0616ef55ebeb74db1c5ca and fixed in 7.1.5 with commit 1c53d16b174dd9e02243fc0e85089e2aa6a0d21a
Issue introduced in 5.10 with commit 4976b718c3551faba2c0616ef55ebeb74db1c5ca and fixed in 7.2-rc2 with commit 72a85e9464a5332fb2cd7efd26d9295275ceda2d
Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.
Unaffected versions might change over time as fixes are backported to
older supported kernel versions. The official CVE entry at
https://cve.org/CVERecord/?id=CVE-2026-72402
will be updated if fixes are backported, please check that for the most
up to date information about this issue.
Affected files
==============
The file(s) affected by this issue are:
kernel/bpf/disasm.c
Mitigation
==========
The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes. Individual
changes are never tested alone, but rather are part of a larger kernel
release. Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all. If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
https://git.kernel.org/stable/c/1c53d16b174dd9e02243fc0e85089e2aa6a0d21a
https://git.kernel.org/stable/c/72a85e9464a5332fb2cd7efd26d9295275ceda2d
reply other threads:[~2026-08-15 6:26 UTC|newest]
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