CVE-2025-21725
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21725
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21725.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-21725
- Downstream
- Related
- Published
- 2025-02-27T02:07:32Z
- Modified
- 2025-10-15T22:33:38.831773Z
- Summary
- smb: client: fix oops due to unset link speed
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix oops due to unset link speed
It isn't guaranteed that NETWORKINTERFACEINFO::LinkSpeed will always be set by the server, so the client must handle any values and then prevent oopses like below from happening:
Oops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41 04/01/2014 RIP: 0010:cifsdebugdataprocshow+0xa45/0x1460 [cifs] Code: 00 00 48 89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8 e7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 <48> f7 74 24 18 48 89 c3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24 RSP: 0018:ffffc90001817be0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99 RDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228 RBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac R10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200 R13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58 FS: 00007fe27119e740(0000) GS:ffff888148600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? _diebody.cold+0x19/0x27 ? die+0x2e/0x50 ? dotrap+0x159/0x1b0 ? cifsdebugdataprocshow+0xa45/0x1460 [cifs] ? doerrortrap+0x90/0x130 ? cifsdebugdataprocshow+0xa45/0x1460 [cifs] ? excdivideerror+0x39/0x50 ? cifsdebugdataprocshow+0xa45/0x1460 [cifs] ? asmexcdivideerror+0x1a/0x20 ? cifsdebugdataprocshow+0xa39/0x1460 [cifs] ? cifsdebugdataprocshow+0xa45/0x1460 [cifs] ? seqreaditer+0x42e/0x790 seqreaditer+0x19a/0x790 procregreaditer+0xbe/0x110 ? _pfxprocregreaditer+0x10/0x10 vfsread+0x469/0x570 ? douseraddrfault+0x398/0x760 ? _pfxvfsread+0x10/0x10 ? findheldlock+0x8a/0xa0 ? _pfxlockrelease+0x10/0x10 ksysread+0xd3/0x170 ? _pfxksysread+0x10/0x10 ? _rcureadunlock+0x50/0x270 ? markheldlocks+0x1a/0x90 dosyscall64+0xbb/0x1d0 entrySYSCALL64afterhwframe+0x77/0x7f RIP: 0033:0x7fe271288911 Code: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8 20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec RSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIGRAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911 RDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003 RBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380 R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000 R13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000 </TASK>
Fix this by setting cifsserveriface::speed to a sane value (1Gbps) by default when link speed is unset.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/208e102a2fca44e40a6c3f7b9e2609cfd17a15aa
- https://git.kernel.org/stable/c/3f901c35e1a1b3ed1b528a17ffdb941aa0294458
- https://git.kernel.org/stable/c/699179dfc8d7da457b152ca5d18ae45f9ed9beaa
- https://git.kernel.org/stable/c/ad3b49fbdb156aa8ee2026ba590642c9b5a410f2
- https://git.kernel.org/stable/c/be7a6a77669588bfa5022a470989702bbbb11e7f
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced548893404c44fc01a59f17727876e02553146fe6Fixed208e102a2fca44e40a6c3f7b9e2609cfd17a15aa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1cd8c353708de99d8bfa7db8a0c961a800b1fa7fFixed3f901c35e1a1b3ed1b528a17ffdb941aa0294458
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda6d8fb54a515f0546ffdb7870102b1238917e567Fixed699179dfc8d7da457b152ca5d18ae45f9ed9beaa
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda6d8fb54a515f0546ffdb7870102b1238917e567Fixedad3b49fbdb156aa8ee2026ba590642c9b5a410f2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda6d8fb54a515f0546ffdb7870102b1238917e567Fixedbe7a6a77669588bfa5022a470989702bbbb11e7f