Vulnerability Details : CVE-2021-32606
In the Linux kernel 5.11 through 5.12.2, isotp_setsockopt in net/can/isotp.c allows privilege escalation to root by leveraging a use-after-free. (This does not affect earlier versions that lack CAN ISOTP SF_BROADCAST support.)
Vulnerability category: Memory CorruptionGain privilege
Products affected by CVE-2021-32606
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-32606
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-32606
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-32606
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-32606
-
http://www.openwall.com/lists/oss-security/2021/05/28/1
oss-security - Re: Linux kernel: net/can/isotp: race condition leads to local privilege escalationMailing List;Patch;Third Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b17c400aeb44daf041627722581ade527bb3c1d
can: isotp: prevent race between isotp_bind() and isotp_setsockopt() - kernel/git/torvalds/linux.git - Linux kernel source tree
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HD3NJBG25AADVGPRC63RX2JOQBMPSWK4/
[SECURITY] Fedora 33 Update: kernel-5.11.21-200.fc33 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/
[SECURITY] Fedora 34 Update: kernel-5.11.21-300.fc34 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73D53S4IZFPFQMRABMXXLW4AJK3EULDX/
[SECURITY] Fedora 32 Update: kernel-5.11.21-100.fc32 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HD3NJBG25AADVGPRC63RX2JOQBMPSWK4/
[SECURITY] Fedora 33 Update: kernel-5.11.21-200.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20210625-0001/
CVE-2021-32606 Linux Kernel Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
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https://www.openwall.com/lists/oss-security/2021/05/11/16
oss-security - Linux kernel: net/can/isotp: race condition leads to local privilege escalationMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/12/1
oss-security - Re: Linux kernel: net/can/isotp: race condition leads to local privilege escalationMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/13/2
oss-security - Re: Linux kernel: net/can/isotp: race condition leads to local privilege escalationMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/
[SECURITY] Fedora 34 Update: kernel-5.11.21-300.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/73D53S4IZFPFQMRABMXXLW4AJK3EULDX/
[SECURITY] Fedora 32 Update: kernel-5.11.21-100.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/14/1
oss-security - Re: Linux kernel: net/can/isotp: race condition leads to local privilege escalationMailing List;Third Party Advisory
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