Bug 1223630 (CVE-2024-26980)

Summary:	VUL-0: CVE-2024-26980: kernel: ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	gabriele.sonnu, vasant.karasulli
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/403751/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-26980:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-05-02 08:28:08 UTC

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf

If ->ProtocolId is SMB2_TRANSFORM_PROTO_NUM, smb2 request size
validation could be skipped. if request size is smaller than
sizeof(struct smb2_query_info_req), slab-out-of-bounds read can happen in
smb2_allocate_rsp_buf(). This patch allocate response buffer after
decrypting transform request. smb3_decrypt_req() will validate transform
request size and avoid slab-out-of-bound in smb2_allocate_rsp_buf().

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26980
https://www.cve.org/CVERecord?id=CVE-2024-26980
https://git.kernel.org/stable/c/0977f89722eceba165700ea384f075143f012085
https://git.kernel.org/stable/c/3160d9734453a40db248487f8204830879c207f1
https://git.kernel.org/stable/c/b80ba648714e6d790d69610cf14656be222d0248
https://git.kernel.org/stable/c/c119f4ede3fa90a9463f50831761c28f989bfb20
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26980.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2278341