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CVE-2022-49085— drbd: Fix five use after free bugs in get_initial_state

AI Predicted 4.9 Difficulty: Theoretical EPSS 0.27% · P19

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 20

VendorProductVersion RangeStatus
LinuxLinuxa29728463b254ce81ecefdf20c1a02e01d9361da< 0489700bfeb1e53eb2039c2291c67e71b0b40103affected
a29728463b254ce81ecefdf20c1a02e01d9361da< dcf6be17b5c53b741898d2223b23e66d682de300affected
a29728463b254ce81ecefdf20c1a02e01d9361da< 188fe6b26765edbad4055611c0f788b6870f4024affected
a29728463b254ce81ecefdf20c1a02e01d9361da< b6a4055036eed1f5e239ce3d8b0db1ce38bba447affected
a29728463b254ce81ecefdf20c1a02e01d9361da< 594205b4936771a250f9d141e7e0fff21c3dd2d9affected
a29728463b254ce81ecefdf20c1a02e01d9361da< a972c768723359ec995579902473028fe3cd64b1affected
a29728463b254ce81ecefdf20c1a02e01d9361da< de63e74da2333b4068bb79983e632db730fea97eaffected
a29728463b254ce81ecefdf20c1a02e01d9361da< 226e993c39405292781bfcf4b039a8db56aab362affected
… +12 more rows
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I. Basic Information for CVE-2022-49085

Vulnerability Information
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Vulnerability Title
drbd: Fix five use after free bugs in get_initial_state
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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get_initial_state中在释放skb后仍使用该skb，导致释放后重用。
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 a29728463b254ce81ecefdf20c1a02e01d9361da ~ 0489700bfeb1e53eb2039c2291c67e71b0b40103 -
LinuxLinux 4.5 -

II. Public POCs for CVE-2022-49085

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III. Intelligence Information for CVE-2022-49085

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Patches & Fixes for CVE-2022-49085 (9)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49498ALSA: pcm: Check for null pointer of pointer substream before dereferencing it
CVE-2022-49486ASoC: fsl: Fix refcount leak in imx_sgtl5000_probe
CVE-2022-49488drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected
CVE-2022-49489drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm run
CVE-2022-49490drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected
CVE-2022-49491drm/rockchip: vop: fix possible null-ptr-deref in vop_bind()
CVE-2022-49492nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags
CVE-2022-49493ASoC: rt5645: Fix errorenous cleanup order
CVE-2022-49494mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe()
CVE-2022-49495drm/msm/hdmi: check return value after calling platform_get_resource_byname()
CVE-2022-49497net: remove two BUG() from skb_checksum_help()
CVE-2022-49496media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko
CVE-2022-49502media: rga: fix possible memory leak in rga_probe
CVE-2022-49507regulator: da9121: Fix uninit-value in da9121_assign_chip_model()
CVE-2022-49508HID: elan: Fix potential double free in elan_input_configured
CVE-2022-49506drm/mediatek: Add vblank register/unregister callback functions
CVE-2022-49504scsi: lpfc: Inhibit aborts if external loopback plug is inserted
CVE-2022-49505NFC: NULL out the dev->rfkill to prevent UAF
CVE-2022-49501usbnet: Run unregister_netdev() before unbind() again
CVE-2022-49500wl1251: dynamically allocate memory used for DMA

Showing top 20 of 706 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-49085

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