Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2022-49769— gfs2: Check sb_bsize_shift after reading superblock

AI Predicted 4.3 Difficulty: Hard EPSS 0.21% · P11

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxb3b94faa5fe5968827ba0640ee9fba4b3e7f736e< d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 1ad197097343568066a8ffaa27ee7d0ae6d9f476affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 15c83fa0fd659dd9fbdc940a560b61236e876a80affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 8b6534c9ae9dba5489703a19d8ba6c8f2cfa33c2affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 5fa30be7ba81191b0a0c7239a89befc0c94286d5affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 28275a7c84d21c55ab3282d897f284d8d527173caffected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 16670534c7cff1acd918a6a5ec751b14e7436b76affected
b3b94faa5fe5968827ba0640ee9fba4b3e7f736e< 670f8ce56dd0632dc29a0322e188cc73ce3c6b92affected
… +10 more rows
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2022-49769

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
gfs2: Check sb_bsize_shift after reading superblock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gfs2: Check sb_bsize_shift after reading superblock Fuzzers like to scribble over sb_bsize_shift but in reality it's very unlikely that this field would be corrupted on its own. Nevertheless it should be checked to avoid the possibility of messy mount errors due to bad calculations. It's always a fixed value based on the block size so we can just check that it's the expected value. Tested with: mkfs.gfs2 -O -p lock_nolock /dev/vdb for i in 0 -1 64 65 32 33; do gfs2_edit -p sb field sb_bsize_shift $i /dev/vdb mount /dev/vdb /mnt/test && umount /mnt/test done Before this patch we get a withdraw after [ 76.413681] gfs2: fsid=loop0.0: fatal: invalid metadata block [ 76.413681] bh = 19 (type: exp=5, found=4) [ 76.413681] function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 492 and with UBSAN configured we also get complaints like [ 76.373395] UBSAN: shift-out-of-bounds in fs/gfs2/ops_fstype.c:295:19 [ 76.373815] shift exponent 4294967287 is too large for 64-bit type 'long unsigned int' After the patch, these complaints don't appear, mount fails immediately and we get an explanation in dmesg.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未检查sb_bsize_shift值，可能导致元数据损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux b3b94faa5fe5968827ba0640ee9fba4b3e7f736e ~ d6b1e8ea6f3418c3b461ad5a35cdc93c996b2c87 -
LinuxLinux 2.6.19 -

II. Public POCs for CVE-2022-49769

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2022-49769

请登录查看更多情报信息。

Patches & Fixes for CVE-2022-49769 (8)

Same Patch Batch · Linux · 2025-05-01 · 245 CVEs total

CVE-2025-377509.8 CRITICALsmb: client: fix UAF in decryption with multichannel
CVE-2025-377789.8 CRITICALksmbd: Fix dangling pointer in krb_authenticate
CVE-2022-497709.8 CRITICALceph: avoid putting the realm twice when decoding snaps fails
CVE-2022-499318.8 HIGHIB/hfi1: Correctly move list in sc_disable()
CVE-2025-377768.8 HIGHksmbd: fix use-after-free in smb_break_all_levII_oplock()
CVE-2025-377778.8 HIGHksmbd: fix use-after-free in __smb2_lease_break_noti()
CVE-2025-377908.8 HIGHnet: mctp: Set SOCK_RCU_FREE
CVE-2022-499108.8 HIGHBluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu
CVE-2022-498868.4 HIGHx86/tdx: Panic on bad configs that #VE on "private" memory access
CVE-2025-231598.4 HIGHmedia: venus: hfi: add a check to handle OOB in sfr region
CVE-2025-377498.2 HIGHnet: ppp: Add bound checking for skb data on ppp_sync_txmung
CVE-2025-377657.8 HIGHdrm/nouveau: prime: fix ttm_bo_delayed_delete oops
CVE-2025-377797.8 HIGHlib/iov_iter: fix to increase non slab folio refcount
CVE-2022-499207.8 HIGHnetfilter: nf_tables: netlink notifier might race to release objects
CVE-2022-499197.8 HIGHnetfilter: nf_tables: release flow rule object from commit path
CVE-2022-499217.8 HIGHnet: sched: Fix use after free in red_enqueue()
CVE-2025-377527.8 HIGHnet_sched: sch_sfq: move the limit validation
CVE-2025-377567.8 HIGHnet: tls: explicitly disallow disconnect
CVE-2025-377617.8 HIGHdrm/xe: Fix an out-of-bounds shift when invalidating TLB
CVE-2022-498047.8 HIGHs390: avoid using global register for current_stack_pointer

Showing top 20 of 245 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49769

No comments yet

Leave a comment