Answer in brief
CVE-2026-53314 records a Medium severity (CVSS 5.5) vulnerability in padata: Put CPU offline callback in ONLINE section to allow failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <65dae8b34f0810f3fa9f77c4c63650cd20820693 || >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <a6d44f477000c6352de6b05e9e276e62083e5fbf || >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <3e6c08dd97dcd22a00aee469e0adfa819071d80e || >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <5a9f29a3e076b637d2234093e57989cf755ded5b || >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <9afe53f14a2aae8c4beb30e5ea51641a34f1a3d3 || >=894c9ef9780c5cf2f143415e867ee39a33ecb75d <c8c4a2972f83c8b68ff03b43cecdb898939ff851 || 2b1207801c393a5e9af2fbac2dd8b0377d8ae63a || 0685dfa0a2ff7635c0b64f7b7f0fafbf1c3e0c14 || 3f4d3d010477365ee1aefedc3ad52563740b777e || >=4.19.202 <4.20 || >=5.4.22 <5.5 || >=5.5.6 <5.6 | 65dae8b34f0810f3fa9f77c4c63650cd20820693, a6d44f477000c6352de6b05e9e276e62083e5fbf, 3e6c08dd97dcd22a00aee469e0adfa819071d80e, 5a9f29a3e076b637d2234093e57989cf755ded5b, 9afe53f14a2aae8c4beb30e5ea51641a34f1a3d3, c8c4a2972f83c8b68ff03b43cecdb898939ff851, 4.20, 5.5, 5.6 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
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.
Quoted source text, attributed separately from HOL analysis.