media: vidtv: fix NULL pointer dereference in vidtv_channel_pmt_match_sections

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Summary

CVECVE-2026-31599
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:38 UTC
Updated2026-06-01 17:16:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: media: vidtv: fix NULL pointer dereference in vidtv_channel_pmt_match_sections syzbot reported a general protection fault in vidtv_psi_desc_assign [1]. vidtv_psi_pmt_stream_init() can return NULL on memory allocation failure, but vidtv_channel_pmt_match_sections() does not check for this. When tail is NULL, the subsequent call to vidtv_psi_desc_assign(&tail->descriptor, desc) dereferences a NULL pointer offset, causing a general protection fault. Add a NULL check after vidtv_psi_pmt_stream_init(). On failure, clean up the already-allocated stream chain and return. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:vidtv_psi_desc_assign+0x24/0x90 drivers/media/test-drivers/vidtv/vidtv_psi.c:629 Call Trace: <TASK> vidtv_channel_pmt_match_sections drivers/media/test-drivers/vidtv/vidtv_channel.c:349 [inline] vidtv_channel_si_init+0x1445/0x1a50 drivers/media/test-drivers/vidtv/vidtv_channel.c:479 vidtv_mux_init+0x526/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:519 vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline] vidtv_start_feed+0x33e/0x4d0 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000180000 probability, percentile 0.048130000 (date 2026-04-27)

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 54e18a23e62e81b8335cec3e8e9c5cb33fd88665 git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 5c986b77200b5ea754ba6636deacc7e0942fec9b git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 93d9e747a9e8a5ca9e3c5e37dcff76b40399139f git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 b7efb4c94797c504a1c678edb48c2aa311d3309f git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 e589de36da106ef739ba98f66f5a5c2023370706 git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 2dff11fb5098ae453651f8f77e94ad499c078022 git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 b832cfd516b8504e95884622cee60bf9a39b7945 git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 07c1e474cf9acf777f09d14a8f8dfcef5b84e46f git Not specified
CNA Linux Linux affected f90cf6079bf67988f8b1ad1ade70fc89d0080905 f8e1fc918a9fe67103bcda01d20d745f264d00a7 git Not specified
CNA Linux Linux affected 5.10 Not specified
CNA Linux Linux unaffected 5.10 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0.1 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e589de36da106ef739ba98f66f5a5c2023370706 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/54e18a23e62e81b8335cec3e8e9c5cb33fd88665 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b7efb4c94797c504a1c678edb48c2aa311d3309f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b832cfd516b8504e95884622cee60bf9a39b7945 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/93d9e747a9e8a5ca9e3c5e37dcff76b40399139f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f8e1fc918a9fe67103bcda01d20d745f264d00a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5c986b77200b5ea754ba6636deacc7e0942fec9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2dff11fb5098ae453651f8f77e94ad499c078022 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/07c1e474cf9acf777f09d14a8f8dfcef5b84e46f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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