CVE-2021-47006
ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/[email protected]/
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 83% of all CVEs (8 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
- CWE-noinfo Not enough information
Affected products
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < 555a70f7fff03bd669123487905c47ae27dbdaac
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < ed1f67465327cec4457bb988775245b199da86e6
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < 3ed8832aeaa9a37b0fc386bb72ff604352567c80
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < 630146203108bf6b8934eec0dfdb3e46dcb917de
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < 7eeacc6728c5478e3c01bc82a1f08958eaa12366
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < dabe299425b1a53a69461fed7ac8922ea6733a25
- affected 1879445dfa7bbd6fe21b09c5cc72f4934798afed – < a506bd5756290821a4314f502b4bafc2afcf5260
- affected 4.7
- unaffected < 4.7
- unaffected 4.9.269 – ≤ 4.9.*
- unaffected 4.14.233 – ≤ 4.14.*
- unaffected 4.19.191 – ≤ 4.19.*
- unaffected 5.4.120 – ≤ 5.4.*
- unaffected 5.10.38 – ≤ 5.10.*
- unaffected 5.11.22 – ≤ 5.11.*
- unaffected 5.12.5 – ≤ 5.12.*
- unaffected 5.13 – ≤ *
References (8)
- https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-47006)Record last updated .