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

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2024-56593— wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw()

EPSS 0.01% · P1

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxaf1fa210f4fc6e304b859b386a3c8a266b1110ab< 342f87d263462c2670b77ea9a32074cab2ac6fa1affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< 7522d7d745d13fbeff3350fe6aa56c8dae263571affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< dfb3f9d3f602602de208da7bdcc0f6d5ee74af68affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< 67a25ea28f8ec1da8894f2f115d01d3becf67dc7affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< 07c020c6d14d29e5a3ea4e4576b8ecf956a80834affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< 34941321b516bd7c6103bd01287d71a1804d19d3affected
af1fa210f4fc6e304b859b386a3c8a266b1110ab< 857282b819cbaa0675aaab1e7542e2c0579f52d7affected
3.15affected
… +8 more rows
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2024-56593

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw() This patch fixes a NULL pointer dereference bug in brcmfmac that occurs when a high 'sd_sgentry_align' value applies (e.g. 512) and a lot of queued SKBs are sent from the pkt queue. The problem is the number of entries in the pre-allocated sgtable, it is nents = max(rxglom_size, txglom_size) + max(rxglom_size, txglom_size) >> 4 + 1. Given the default [rt]xglom_size=32 it's actually 35 which is too small. Worst case, the pkt queue can end up with 64 SKBs. This occurs when a new SKB is added for each original SKB if tailroom isn't enough to hold tail_pad. At least one sg entry is needed for each SKB. So, eventually the "skb_queue_walk loop" in brcmf_sdiod_sglist_rw may run out of sg entries. This makes sg_next return NULL and this causes the oops. The patch sets nents to max(rxglom_size, txglom_size) * 2 to be able handle the worst-case. Btw. this requires only 64-35=29 * 16 (or 20 if CONFIG_NEED_SG_DMA_LENGTH) = 464 additional bytes of memory.
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wifi:brcmfmac模块中brcmf_sdiod_sglist_rw函数中的空指针取消引用问题。
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 af1fa210f4fc6e304b859b386a3c8a266b1110ab ~ 342f87d263462c2670b77ea9a32074cab2ac6fa1 -
LinuxLinux 3.15 -

II. Public POCs for CVE-2024-56593

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-56593

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-12-27 · 221 CVEs total

CVE-2024-56607wifi: ath12k: fix atomic calls in ath12k_mac_op_set_bitrate_mask()
CVE-2024-56594drm/amdgpu: set the right AMDGPU sg segment limitation
CVE-2024-56595jfs: add a check to prevent array-index-out-of-bounds in dbAdjTree
CVE-2024-56596jfs: fix array-index-out-of-bounds in jfs_readdir
CVE-2024-56597jfs: fix shift-out-of-bounds in dbSplit
CVE-2024-56598jfs: array-index-out-of-bounds fix in dtReadFirst
CVE-2024-56599wifi: ath10k: avoid NULL pointer error during sdio remove
CVE-2024-56601net: inet: do not leave a dangling sk pointer in inet_create()
CVE-2024-56600net: inet6: do not leave a dangling sk pointer in inet6_create()
CVE-2024-56602net: ieee802154: do not leave a dangling sk pointer in ieee802154_create()
CVE-2024-56603net: af_can: do not leave a dangling sk pointer in can_create()
CVE-2024-56604Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()
CVE-2024-56605Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create()
CVE-2024-56606af_packet: avoid erroring out after sock_init_data() in packet_create()
CVE-2024-56618pmdomain: imx: gpcv2: Adjust delay after power up handshake
CVE-2024-56615bpf: fix OOB devmap writes when deleting elements
CVE-2024-56616drm/dp_mst: Fix MST sideband message body length check
CVE-2024-56617cacheinfo: Allocate memory during CPU hotplug if not done from the primary CPU
CVE-2024-56614xsk: fix OOB map writes when deleting elements
CVE-2024-56619nilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()

Showing top 20 of 221 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56593

No comments yet

Leave a comment