CVE-2022-49017
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49017
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49017.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49017
- Downstream
- Related
- Published
- 2024-10-21T20:15:12Z
- Modified
- 2025-08-09T20:01:26Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
tipc: re-fetch skb cb after tipcmsgvalidate
As the call trace shows, the original skb was freed in tipcmsgvalidate(), and dereferencing the old skb cb would cause an use-after-free crash.
BUG: KASAN: use-after-free in tipccryptorcvcomplete+0x1835/0x2240 [tipc] Call Trace: <IRQ> tipccryptorcvcomplete+0x1835/0x2240 [tipc] tipccryptorcv+0xd32/0x1ec0 [tipc] tipcrcv+0x744/0x1150 [tipc] ... Allocated by task 47078: kmemcacheallocnode+0x158/0x4d0 _allocskb+0x1c1/0x270 tipcbufacquire+0x1e/0xe0 [tipc] tipcmsgcreate+0x33/0x1c0 [tipc] tipclinkbuildprotomsg+0x38a/0x2100 [tipc] tipclinktimeout+0x8b8/0xef0 [tipc] tipcnodetimeout+0x2a1/0x960 [tipc] calltimerfn+0x2d/0x1c0 ... Freed by task 47078: tipcmsgvalidate+0x7b/0x440 [tipc] tipccryptorcvcomplete+0x4b5/0x2240 [tipc] tipccryptorcv+0xd32/0x1ec0 [tipc] tipcrcv+0x744/0x1150 [tipc]
This patch fixes it by re-fetching the skb cb from the new allocated skb after calling tipcmsgvalidate().
- References