Description

In the Linux kernel, the following vulnerability has been resolved: tcp: check skb is non-NULL in tcp_rto_delta_us() We have some machines running stock Ubuntu 20.04.6 which is their 5.4.0-174-generic kernel that are running ceph and recently hit a null ptr dereference in tcp_rearm_rto(). Initially hitting it from the TLP path, but then later we also saw it getting hit from the RACK case as well. Here are examples of the oops messages we saw in each of those cases: Jul 26 15:05:02 rx [11061395.780353] BUG: kernel NULL pointer dereference, address: 0000000000000020 Jul 26 15:05:02 rx [11061395.787572] #PF: supervisor read access in kernel mode Jul 26 15:05:02 rx [11061395.792971] #PF: error_code(0x0000) - not-present page Jul 26 15:05:02 rx [11061395.798362] PGD 0 P4D 0 Jul 26 15:05:02 rx [11061395.801164] Oops: 0000 [#1] SMP NOPTI Jul 26 15:05:02 rx [11061395.805091] CPU: 0 PID: 9180 Comm: msgr-worker-1 Tainted: G W 5.4.0-174-generic #193-Ubuntu Jul 26 15:05:02 rx [11061395.814996] Hardware name: Supermicro SMC 2x26 os-gen8 64C NVME-Y 256G/H12SSW-NTR, BIOS 2.5.V1.2U.NVMe.UEFI 05/09/2023 Jul 26 15:05:02 rx [11061395.825952] RIP: 0010:tcp_rearm_rto+0xe4/0x160 Jul 26 15:05:02 rx [11061395.830656] Code: 87 ca 04 00 00 00 5b 41 5c 41 5d 5d c3 c3 49 8b bc 24 40 06 00 00 eb 8d 48 bb cf f7 53 e3 a5 9b c4 20 4c 89 ef e8 0c fe 0e 00 <48> 8b 78 20 48 c1 ef 03 48 89 f8 41 8b bc 24 80 04 00 00 48 f7 e3 Jul 26 15:05:02 rx [11061395.849665] RSP: 0018:ffffb75d40003e08 EFLAGS: 00010246 Jul 26 15:05:02 rx [11061395.855149] RAX: 0000000000000000 RBX: 20c49ba5e353f7cf RCX: 0000000000000000 Jul 26 15:05:02 rx [11061395.862542] RDX: 0000000062177c30 RSI: 000000000000231c RDI: ffff9874ad283a60 Jul 26 15:05:02 rx [11061395.869933] RBP: ffffb75d40003e20 R08: 0000000000000000 R09: ffff987605e20aa8 Jul 26 15:05:02 rx [11061395.877318] R10: ffffb75d40003f00 R11: ffffb75d4460f740 R12: ffff9874ad283900 Jul 26 15:05:02 rx [11061395.884710] R13: ffff9874ad283a60 R14: ffff9874ad283980 R15: ffff9874ad283d30 Jul 26 15:05:02 rx [11061395.892095] FS: 00007f1ef4a2e700(0000) GS:ffff987605e00000(0000) knlGS:0000000000000000 Jul 26 15:05:02 rx [11061395.900438] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jul 26 15:05:02 rx [11061395.906435] CR2: 0000000000000020 CR3: 0000003e450ba003 CR4: 0000000000760ef0 Jul 26 15:05:02 rx [11061395.913822] PKRU: 55555554 Jul 26 15:05:02 rx [11061395.916786] Call Trace: Jul 26 15:05:02 rx [11061395.919488] Jul 26 15:05:02 rx [11061395.921765] ? show_regs.cold+0x1a/0x1f Jul 26 15:05:02 rx [11061395.925859] ? __die+0x90/0xd9 Jul 26 15:05:02 rx [11061395.929169] ? no_context+0x196/0x380 Jul 26 15:05:02 rx [11061395.933088] ? ip6_protocol_deliver_rcu+0x4e0/0x4e0 Jul 26 15:05:02 rx [11061395.938216] ? ip6_sublist_rcv_finish+0x3d/0x50 Jul 26 15:05:02 rx [11061395.943000] ? __bad_area_nosemaphore+0x50/0x1a0 Jul 26 15:05:02 rx [11061395.947873] ? bad_area_nosemaphore+0x16/0x20 Jul 26 15:05:02 rx [11061395.952486] ? do_user_addr_fault+0x267/0x450 Jul 26 15:05:02 rx [11061395.957104] ? ipv6_list_rcv+0x112/0x140 Jul 26 15:05:02 rx [11061395.961279] ? __do_page_fault+0x58/0x90 Jul 26 15:05:02 rx [11061395.965458] ? do_page_fault+0x2c/0xe0 Jul 26 15:05:02 rx [11061395.969465] ? page_fault+0x34/0x40 Jul 26 15:05:02 rx [11061395.973217] ? tcp_rearm_rto+0xe4/0x160 Jul 26 15:05:02 rx [11061395.977313] ? tcp_rearm_rto+0xe4/0x160 Jul 26 15:05:02 rx [11061395.981408] tcp_send_loss_probe+0x10b/0x220 Jul 26 15:05:02 rx [11061395.985937] tcp_write_timer_handler+0x1b4/0x240 Jul 26 15:05:02 rx [11061395.990809] tcp_write_timer+0x9e/0xe0 Jul 26 15:05:02 rx [11061395.994814] ? tcp_write_timer_handler+0x240/0x240 Jul 26 15:05:02 rx [11061395.999866] call_timer_fn+0x32/0x130 Jul 26 15:05:02 rx [11061396.003782] __run_timers.part.0+0x180/0x280 Jul 26 15:05:02 rx [11061396.008309] ? recalibrate_cpu_khz+0x10/0x10 Jul 26 15:05:02 rx [11061396.012841] ? native_x2apic_icr_write+0x30/0x30 Jul 26 15:05:02 rx [11061396.017718] ? lapic_next_even ---truncated---

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  5.5 MEDIUM

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://git.kernel.org/stable/c/09aea49fbc7e755a915c405644f347137cdb62b0	Patch
https://git.kernel.org/stable/c/570f7d8c9bf14f041152ba8353d4330ef7575915	Patch
https://git.kernel.org/stable/c/5c4c03288a4aea705e36aa44119c13d7ee4dce99	Patch
https://git.kernel.org/stable/c/81d18c152e3f82bacadf83bc0a471b2363b9cc18	Patch
https://git.kernel.org/stable/c/96c4983eab2a5da235f7fff90beaf17b008ba029	Patch
https://git.kernel.org/stable/c/c8770db2d54437a5f49417ae7b46f7de23d14db6	Patch
https://git.kernel.org/stable/c/ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	NIST

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Change History

2 change records found show changes

Initial Analysis by NIST 10/22/2024 10:59:31 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 706 characters. View Entire Change Record OR *cpe:2.3:o:linux:linux_kernel:3.10.108:*:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.13 up to (excluding) 5.10.227 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.168 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.113 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.54 *c
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-476
Changed	Reference Type	https://git.kernel.org/stable/c/09aea49fbc7e755a915c405644f347137cdb62b0 No Types Assigned	https://git.kernel.org/stable/c/09aea49fbc7e755a915c405644f347137cdb62b0 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/570f7d8c9bf14f041152ba8353d4330ef7575915 No Types Assigned	https://git.kernel.org/stable/c/570f7d8c9bf14f041152ba8353d4330ef7575915 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/5c4c03288a4aea705e36aa44119c13d7ee4dce99 No Types Assigned	https://git.kernel.org/stable/c/5c4c03288a4aea705e36aa44119c13d7ee4dce99 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/81d18c152e3f82bacadf83bc0a471b2363b9cc18 No Types Assigned	https://git.kernel.org/stable/c/81d18c152e3f82bacadf83bc0a471b2363b9cc18 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/96c4983eab2a5da235f7fff90beaf17b008ba029 No Types Assigned	https://git.kernel.org/stable/c/96c4983eab2a5da235f7fff90beaf17b008ba029 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/c8770db2d54437a5f49417ae7b46f7de23d14db6 No Types Assigned	https://git.kernel.org/stable/c/c8770db2d54437a5f49417ae7b46f7de23d14db6 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86 No Types Assigned	https://git.kernel.org/stable/c/ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86 Patch

New CVE Received by NIST 10/21/2024 8:15:05 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 3998 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: tcp: check skb is non-NULL in tcp_rto_delta_us() We have some machines running stock Ubuntu 20.04.6 which is their 5.4.0-174-generic kernel that are running ceph and recently hit a null ptr dereference in tcp_rearm_rto(). Initially hitting it from the TLP path, but then later we also saw it getting hit from the RACK case as well. Here are examples of the oops messages we saw in each of those cases: Jul 26 15:05:02 rx [1106139
Added	Reference		kernel.org https://git.kernel.org/stable/c/09aea49fbc7e755a915c405644f347137cdb62b0 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/570f7d8c9bf14f041152ba8353d4330ef7575915 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/5c4c03288a4aea705e36aa44119c13d7ee4dce99 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/81d18c152e3f82bacadf83bc0a471b2363b9cc18 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/96c4983eab2a5da235f7fff90beaf17b008ba029 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/c8770db2d54437a5f49417ae7b46f7de23d14db6 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86 [No types assigned]