CVE-2026-53314 is a vulnerability in Linux Kernel
Published on June 26, 2026
padata: Put CPU offline callback in ONLINE section to allow failure
In the Linux kernel, the following vulnerability has been resolved:
padata: Put CPU offline callback in ONLINE section to allow failure
syzbot reported the following warning:
DEAD callback error for CPU1
WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614
at commit 4ae12d8bd9a8 ("Merge tag 'kbuild-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux")
which tglx traced to padata_cpu_dead() given it's the only
sub-CPUHP_TEARDOWN_CPU callback that returns an error.
Failure isn't allowed in hotplug states before CPUHP_TEARDOWN_CPU
so move the CPU offline callback to the ONLINE section where failure is
possible.
Products Associated with CVE-2026-53314
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below 65dae8b34f0810f3fa9f77c4c63650cd20820693 is affected.
- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below a6d44f477000c6352de6b05e9e276e62083e5fbf is affected.
- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below 3e6c08dd97dcd22a00aee469e0adfa819071d80e is affected.
- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below 5a9f29a3e076b637d2234093e57989cf755ded5b is affected.
- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below 9afe53f14a2aae8c4beb30e5ea51641a34f1a3d3 is affected.
- Version 894c9ef9780c5cf2f143415e867ee39a33ecb75d and below c8c4a2972f83c8b68ff03b43cecdb898939ff851 is affected.
- Version 2b1207801c393a5e9af2fbac2dd8b0377d8ae63a is affected.
- Version 0685dfa0a2ff7635c0b64f7b7f0fafbf1c3e0c14 is affected.
- Version 3f4d3d010477365ee1aefedc3ad52563740b777e is affected.
- Version 4.19.202 and below 4.20 is affected.
- Version 5.4.22 and below 5.5 is affected.
- Version 5.5.6 and below 5.6 is affected.
- Version 5.6 is affected.
- Before 5.6 is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.141, <= 6.6.* is unaffected.
- Version 6.12.91, <= 6.12.* is unaffected.
- Version 6.18.33, <= 6.18.* is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.