CVE-2020-12653 — An issue was found in Linux kernel before 5

An issue was found in Linux kernel before 5.5.4. The mwifiex_cmd_append_vsie_tlv() function in drivers/net/wireless/marvell/mwifiex/scan.c allows local users to gain privileges or cause a denial of service because of an incorrect memcpy and buffer overflow, aka CID-b70261a288ea.

01What is this vulnerability?

An issue was found in Linux kernel before 5.5.4. The mwifiex_cmd_append_vsie_tlv() function in drivers/net/wireless/marvell/mwifiex/scan.c allows local users to gain privileges or cause a denial of service because of an incorrect memcpy and buffer overflow, aka CID-b70261a288ea.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-05-05T04:47:35.000Z
• Last modified: 2024-08-04T12:04:22.557Z

09References

• cdn.kernel.org — https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.4
• github.com — https://github.com/torvalds/linux/commit/b70261a288ea4d2f4ac7cd04be08a9f0f2de4f4…
• git.kernel.org — https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b7026…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2020/05/08/2
• security.netapp.com — https://security.netapp.com/advisory/ntap-20200608-0001/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
• www.debian.org — https://www.debian.org/security/2020/dsa-4698
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html