CVE-2021-47668
can: dev: can_restart: fix use after free bug
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.31
References 7
git.kernel.org
- stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
- stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
- stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421
- stable/c/08ab951787098ae0b6c0364aeea7a8138226f234
- stable/c/ac48ef15826e83f4206c47add61072e8fc76d328
- stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a
- stable/c/03f16c5075b22c8902d2af739969e878b0879c94