CVE-2021-47520
can: pch_can: pch_can_rx_normal: fix use after free
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.37
References 8
git.kernel.org
- stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d
- stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
- stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
- stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
- stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
- stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
- stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
- stable/c/94cddf1e9227a171b27292509d59691819c458db